Sperm Egg Describe life a sperm life egg start finish. Cover points story: - Trace movements sperm
here It All Started
In order to properly chronicle the journey of a sperm and egg to fertilization, one must begin with the factors responsible for their creation. It all starts with a thought -- or, from a release from the brain. For sperms to be created, the pituitary gland (which is inside the brain) receives a hormone known as GnRH that causes it to produce the two key chemicals responsible for sperm production (Rosick 2003). The first is called follicle stimulating hormone and the second is known as lutenizing hormone.
Once these hormones are created, sperm development can actually begin in the lower portions of seminiferous tubules, which are located inside of the testicles. The lower part of these tubules are known contain sertoli cells, in which sperm creation begins. Gradually, sperms…… [Read More]
This is true of the study on the intelligence of what Kalat identifies as 'intersexed' individuals. To determine why it would appear that intersex children possess higher than average IQ scores, it is appropriate to first court a sample of participants. The population should be a substantial enough size to promote statistically meaningful findings. Once this experimental population is defined, two separate control populations should be established of male and female participants. Based on the premise that intersex children are likely to be brought to the attention of investigators through the reconnaissance of 'intelligent families,' qualifying conditions for an intelligent family must be designed. These qualifications should then be used to identify potential experimental and control group participants. Finally, testing-validated measures of intelligence should be used to determine whether differences in IQ scores do exist between intesex, male and female participants from a common familial-intellectual background.
In reality, the…… [Read More]
The majority of women can return to their normal routine the next day ("In Vitro Fertilization"). In most cases total bed rest is not required unless there is some risk associated with the development of OHSS ("In Vitro Fertilization").
The NIH further explains that women who utilize IVF must take the hormone progesterone for at least two months following the embryo transfer ("In Vitro Fertilization"). The hormone is taken through daily shots or pills. Progesterone is a naturaly produced hormone produced that assists in thickenign the lining of the uterus ("In Vitro Fertilization"). This thickening makes it easier for the embryo to implant to the wall of the uterus. If there is ot enough progesterone the woman will miscarry ("In Vitro Fertilization").
In additon to the risks associated with this type of reproductive technology, IVF is very expensive ("In Vitro Fertilization"). The NIH explains that many states require that insurance…… [Read More]
Parents be Allowed to Choose their aby's Gender?
THE TWO SIDES
Should Parents be Allowed to Choose their aby's Gender?
A revolutionary lab technique, called sperm sorting, can now establish the gender of an offspring (Mail Online, 2013). The sperm carries the sex chromosome of a future child and sorting involves choosing the desired sex chromosome and then inseminating a woman with it. Gender can also be selected by abortion and before the embryonic stage through IVF or in vitro fertilization. Gender selection has been the subject of much debate because of its many consequences (Mail Online).
Artificial insemination consists of inserting concentrated sperm into the uterus to achieve a greater chance of fertilization (Stephens, 2011). Other methods are used to choose the gender of the baby. One is by using a dye on the desired gender from the sperm and then returning the dyed cell into womb. The Ericsson…… [Read More]
Men vs. omen' -- Nonverbal communication and the egg meeting the sperm
One need look no father than the bookshelves that proclaim men are from Mars, omen are from Venus to see the point-of-view of Emily Martin advocated in her essay "The Egg and the Sperm: How Science Has Constructed a Romance Based on Stereotypical Male-Female Roles." Although readers may like to think of science as objective in its categories, in fact, beginning a study by looking at men and women as the absolute categories of human sexual nature is itself biased, Martin suggests. The language of biological texts is equally as coded between activity and passivity, sperm vs. egg, just as subjective as the language that 'sees' certain planets as male or female.
Scientific language is human created, and it both affects and reflects the way we think about gender. Even in a female-created and directed study such as…… [Read More]
Studies have shown that the mean maternal age of motherhood has been increasing since 1980, which although may suit many modern careers and life styles, it puts women at a greater risk of declining fertility. The fundamental manifestation of ovarian aging is not just because of a decrease in the number of oocytes, but also because of a decline in its quality. Moreover, women of advanced maternal age are at a greater risk of developing aneuploidy in embryos. This contributes to their inability to bear a child by increasing both implantation loss and pregnancy failure. (Judy et al., 2012)
In Vitro Fertilization, IVF is one of the forms of assisted reproductive technology that enhances the chances of conception. In IVF, ovaries are stimulated to produce mature oocytes which are retrieved transvaginally under sonographic guidance. Oocyte retrieval is normally an outpatient procedure, performed with adequate analgesia. The sperm and…… [Read More]
gender have influenced the historic development of science in the west, as reason and science have long been seen as male traits. Similarly, gender ideals such as the characterization of females as maternal, associated with nature, irrational, and week have been reflected in scientific literature. Today, science continues to be influenced by ideas of gender, as literature reflects gender biases, and female scientists routinely must challenge gender biases.
Many of the ideals the influence the historic development science come from the Enlightenment, a time during the 17th and 18th centuries where reason was seen to be a driving force for progress. Enlightened men were rational, and sought happiness, knowledge, and freedom. Given this emphasis on rationality, and the association of women with the home and emotion, women were largely excluded from the ideals of the Enlightenment. The rational affairs of humankind were thought to be left to men, who acted…… [Read More]
A also consider that a proper legislation should protect the surrogate mother, in order to avoid situations in which her rights would not be respected. Therefore, she should be paid her medical expenses and, as a sort of benefit for her act, she should be granted a free medical insurance and the right to free medical analyses. Moreover, the legislation should stipulate that the surrogate mother should be of the same nationality - American in this case - as the future parents, in order to avoid situations as those which occurred in the Indian women case, who have thought to have been abused, a thing they have accepted because of their poor material status.
All in all, it seems that gestational surrogacy is not among the best surrogacy practice, and this is because of the ethnic, legal and cultural misunderstandings it might generate. In addition, I consider it should be…… [Read More]
Original DNA Strand:
Transcription (base sequence of NA):
Translation (amino acid sequence):
Met -- Gly -- Asn -- His -- Arg -- STOP
Mutated gene sequence one:
Transcription (base sequence of NA):
Translation (amino acid sequence):
Met -- Arg -- Asn -- His -- Arg -- STOP
Mutated gene sequence two:
Transcription (base sequence of NA):
Translation (amino acid sequence):
Ile -- Gly -- Asn -- Asp -- Pro-STOP
What is the significance of the first and last codons of an mNA transcript?
The first codon ("Met") indicates the beginning of the transcription sequence. The last codon indicates the end of a protein sequence, which stops transcription.
Each protein sequence is coded with a starting and ending point, to indicate the length and type of the protein according to the sequence transcribed from the…… [Read More]
Original Gene Sequence: 3'-T AC CC T. TT AGTAGCCAC T-5
Transcription of Original: 3'-A UG GG A AA UCAUCGGUG A-5'
Translation of Original: Start codon Met, Gly, Asn, His, Arg, Stop
Mutated Gene Sequence 1: 3'-T ACGCT TT AGTAGCCAT T-5'
Transcription of Mutated 1: 3'-A UGCGA AA UCAUCGGUA A-5'
Translation of Mutated 1: Start codon Met, Arg, Asn, His, Arg, Stop
Mutated Gene Sequence 2: 3'-T AACCT TT ACTAGGCAC T-5'
Transcription of Mutated 2: 3'-AUUGGAAAUGAUCCGUGA
Translation of Mutated 2: Ile, Gly, Asn, Asp, Pro, Stop
The first and last codons of the sequences are the start and stop codons respectively. The start codon indicates where transcription should begin. The stop codon indicates where transcription should end.
When a mutation occurs in the start codon, transcription will not be initiated and thus a protein will not be produced. When a mutation in the stop codon occurs sometimes the mutation will…… [Read More]
ethical dilemmas surround surrogacy and the donation of egg and/or sperm? Because surrogates are paid, is this a practice that exploits the poor, such as surrogate mothers in ndia? Why or Why not?
Egg donation and surrogacy raises ethical dilemmas on all four basic principles of medical ethics: autonomy, justice, beneficence, and non-maleficence.
Autonomy -- .
Consent has to be given freely and with full volition of the surrogate mother. Yet, most times, intense pressure is involved aside from the fact that poor women in ndia may capitulate to the need for money and be taken in by the huge sums offered. The emotional and medical pressures are immense, but these women are often grossly misinformed about the situation that they are bound to undergo. Their poverty hampers them from making the clear, informed decisions that they would otherwise need to in order to undergo the procedure. Whilst most egg…… [Read More]
However, proper treatment may restore fertility. During pregnancy, existing fibroids may grow at a greater pace due to the increased blood flow and estrogen levels but they usually return to their original size after delivery.
Pelvic Inflammatory Disease
Definition & Cause: Pelvic inflammatory disease (PID) is a general term for infection of the lining of the uterus, the fallopian tubes. It is a very common disease and in the United States alone, nearly 1 million women develop PID each year and more than 100,000 women become infertile as a result of PID (NAID Fact sheet, 2005). It is caused in a majority of cases through sexually transmitted diseases such as Chlamydia and gonorrhea but PID-causing bacteria may also cause infection through other means such as during childbirth, abortion, or IUD insertion.
Complications: PID can damage the fallopian tubes, ovaries, uterus, and cervix, leading to chronic pelvic pain and serious damage…… [Read More]
oman Clings to Hope of Having Dead Fiancee's Baby
Today medical science is capable of things only imagined in the past. One of these possibilities stems from the technique of Invitro fertilization and cryobiology. It is now possible to freeze a man's sperm and impregnate a woman with it at some future time. This practice raises many ethical issues as far as the legal professions are concerned, primarily informed consent, ownership of the sperm and many other issues. However, it also raises issues for the medical profession as well. Now it is possible, but the primary question remains, should we? This research will examine the role of the nurse in relation to her ethical obligations and the moral issues imposed upon her concerning this tricky moral issue.
Recently a court case surface where a woman wants to have he fiancee's sperm inseminated into her in order to get pregnant with…… [Read More]
rapid movement of the modern age and the vast usage of technological equipment, it has become a constant question on whether radio frequencies are damaging to human health. Cell phones are known to emit relatively high doses of electromagnetic waves, which in some research, has been pinpointed to the adverse effect that it has on males, namely the issue on fertility. eports have been made indicating that cell phones might be another risk factor regarding the rise of male infertility due to its frequency emissions. While previous research has found no conclusive tie-ins to the phenomena, the latest technology and data have shown the contrary, though even this research is still subject to much scrutiny. Overall, there are too many variables to indicate that cell phones would be a main cause for male fertility, not without discussing the various other factors that help infertility along.
Infertility as defined…… [Read More]
With recessive genes (in which both mother and father have to contribute a 'positive' set of the same genes) are designed to work in precisely the same way that hemophilia does: One out of four offspring (on average) will have the condition, two will be carriers, and one will be neither sick nor a carrier.
Klinefelter's syndrome, on the other hand, arises from a mechanical mistake that occurs on the genetic level during the process of the way in which egg and sperm come together to create a genetically whole zygote/fetus/baby. Under normal genetic conditions, an egg brings half of the needed genetic material to an individual. This female contribution is referred to as the X chromosome. Sperm, which also contribute half of an individual's genetic material, can be either X or Y in terms of chromosomal type. An X sperm combines with the X chromosome of an egg to…… [Read More]
Chromosomal Abnormality: Down Syndrome
Down Syndrome is a chromosomal abnormality which is accompanied by both serious physical and mental developmental problems, and it is one of the most common genetic syndromes. According to Rebecca Saenz (1999), Down Syndrome occurs in one out of every 800 to 1,000 live births, which is an extremely high rate of incidence. This disorder occurs equally among both boys and girls. There are several genetic occurrences that can cause Down Syndrome to appear in a child, but all of them lead to the same chromosomal abnormality. An extra chromosome, which is the unit of genetic information that exists within each cell, appears in the genetic code of the affected person. When a baby is normally conceived, the egg cell of the mother and the sperm cell of the father each contribute 23 chromosomes to the genetic makeup of the child. In some cases, there may…… [Read More]
Particularly, the risks of diverse neoplasms have been seen to be raised in Turner Syndrome is quite low quantum, however, except for gut cancer and gonaboblastoma in patients having occult Y chromosome sequences. (Cabanas; Garcia-Caballero; Barreiro; Castro-Feijoo; Gallego; Arevalo; Canete; Pombo, 2005)
Additionally, there appear to have no prior indication of the relationship between the Turner Syndrome and papillary thyroid carcinoma, irrespective of the fact that there has been one report of an anaplastic thyroid carcinoma in a TS patient in association with Hashimoto's thyroiditis. Several epidemiological studies and studies relating to exhaustive long-term monitoring of GH-associated patients have been seen to have benefited therapeutically from GH treatment and found to be safe having no detectable effect on risk of cancer. But the current studies have shown a probable relationship between GH-IGF axis and the pathogenesis of neoplasms. The study on papillary thyroid carcinoma after GH therapy for Turner Syndrome…… [Read More]
Vitro' fertilization is one of the applications of advanced technology that provides a solution to infertility among couples. The practice has long been in existence, and many referred to offspring of couples who have undergone this process, 'test tube babies.' In vitro ('in glass') fertilization is only one of the many treatments for infertility. The general term by which in vitro can be identified is through artificial insemination, wherein semen taken from the woman's partner or male donor is "injected" into a woman's uterus. In the technique of in vitro fertilization, however, "eggs are removed from a woman's ovaries and fertilized in a laboratory dish with her partner's sperm" (Dmowski 1991 265).
There are several reasons why infertility happens, and indications that show that a couple needs to undergo an in vitro treatment. Infertility may be due to either the man or the woman's infertility. A man becomes infertile when…… [Read More]
Scrimshaw: As History and Currency of a Bygone Era
The art of Scrimshaw is an art of idle hands. Scrimshaw, as we know it today dates back to the early part of the nineteenth century. Sailors on long idle whaling expeditions would use the leavings of the hunt to create art. haling required many more crew than was actually needed to man the ship, as the animal required many men to finish the kill once it was injured and also many to ground it, bring it on board or on shore and hundreds sometimes to quickly finish the butchering and harvest. (Paszkiewicz 1)
haling was even seen as a punishment for young evil doers and in that way
Scrimshaw could be compared at least somewhat to prison art, probably its closest folk art neighbor. "haling, after all, was better than most systems of peonage that flourish to-day, for it released…… [Read More]
Timing and Principle Characteristics of Developing Female and Male Germ Cells From Differentiation in Early Embryo to Point of Fertilization
Principle Characteristics Male and Female Germ Cells
The female and male germ cells are reproductive cells that fuse with one another during fertilization (Encarta, 2005; Burfoot, 1999). Each possesses unique characteristics and molecular structure during the prefertilization phase of development and post fertilization. These characteristics are influenced by the production of various hormones in the male and female body.
Fertilization occurs when the materials from two gametes come together to form an embryo. The female gamete is often referred to as the egg or female germ cell whereas the male gamete is often referred to as sperm or the male germ cells (Encarta, 2005; Burfoot, 1999). Developing female germ cells are generally large and contain nutrient reserves including what is referred to as the egg 'yolk' or sometimes white and…… [Read More]
Hermaphrodite is an organism in which a single individual has both male and female gametes. Many plants and some animals are naturally hermaphroditic and can self-fertilize and reproduce themselves from a single organism. (Omoto & Lurquin, 2004, p. 209) While some species actually reproduce asexually, such as single celled organisms and other creatures, this is not the same as being hermaphrodite. There are benefits to the species in some sense in being able to self-fertilize and reproduce in this way. Sexual reproduction in effects cuts the population's growth rate in half. Only females produce offspring, not males. If half the population is male, then the speed of population growth is half that of an all-female population. An all-female species can quickly out produce a male/female species, allowing an all-female species to survive in high mortality habitats where a male/female species can't succeed. This result is also true in hermaphrodite species,…… [Read More]
I do not believe that wearing glasses or make-up is wrong, even though this is an enhancement of the human body by improving one's life by being able to see, or covering blemishes and unsightly birthmarks that might make an individual self-conscious. Is selecting the best sperm donor really so much different than a man or a woman basing his or her choice of a mate upon that individual's appearance, intelligence, and lack of unpleasant 'skeletons' in the genetic closet? Svaulescu's idea that one has a moral obligation to screen for genetic defects or to personally improve the human race through reproduction makes one queasy, but the idea of leaving everything up to nature, in theory, would mean an end of folic acid for pregnant women or even birth control.
But really, the ultimate argument for allowing patients to attempt to engineer their offspring by selecting 'better sperm' may be…… [Read More]
Instead, it depends on pollination. Pollination refers to the process where the male gametophyte, in the form of pollen, travels to the female gametophyte, in the form of the seed. The pollen can travel over a much greater distance than sperm. This ability to disperse is important and reduces the requirement for water. In saying this, it must be noted that when the male part is in the form of sperm, it requires water. This is partly because the sperm does not have any vascular tissue. This is also because the sperm's only form of movement is swimming, which clearly requires water. For terrestrial plants then, not having water is a major problem. Having a seed and pollen solves this problem and makes dispersal without water possible.
Pollination then occurs when a pollen grain reaches a seed and passes through its micropyle, a tiny hole in the seed covering present…… [Read More]
Earthworms are hermaphrodites since they can generate both sperm and eggs. Mating involves 2 earthworms inseminating each other where sperms are exchanged. The male and female sexual cavities are located near the clitellum. They connect the lower ends of their anteriors with heads positioned in reverse directions. Mucous secreted joins the openings with slime. Sperm is pushed into the longitudinal channels formed by the mucous. They reach the sperm receptacles of their partner, which then break apart. Laying of the eggs and fertilization follows ("Native Australian," 2006)
The circulatory system is constituted of the heart, blood and blood vessels. It is needed to distribute nutrition to different areas in the body and is of two types -- open and closed. An open circulatory system (used by earthworms) is the simpler of the two where the heart drives blood into open spaces. The organs and tissues in the body are soaked…… [Read More]
Myth, Literature, and the African World
The book Myth, Literature, and the African World, was published in 1976, twenty years before the author, Wole Soyinka, was awarded the Nobel Prize in Literature.
In his Preface, he clearly wants to convey that African academia has created a kind of "intellectual bondage and self-betrayal" by not facing up to truths about the fact that African literature must not be merely "an appendage of English literature." This was written twenty-eight years ago, of course, and because the instructions ask that "only this reference" be used, one cannot know if indeed African universities now have a section for "Comparative Literature" -- which would presumably allow for the inclusion of literature about Africa, by Africans. And that literature would, hopefully, be reflective of what African cultures were like during the continent was dominated by European colonial powers -- something that Soyinka clearly would like…… [Read More]
Human Genome, Stem Cells, & Reparations
Stems Cells are the source of all body tissues. Growth and development of the human body arises from the stem cell and is maintained by it. Although all cells can divide or copy themselves, stem cells are unique because they can replicate and create all other types of cells. This ability of the stem cell to develop into any of the 220 cell types that make up the human body makes it a powerful tool for biological research and medicine. Scientists believe that stem cell research has the potential of leading to previously incurable diseases.
How are Stem Cells Formed?
When a sperm cell fertilizes an egg, a zygote (fertilized egg) is formed. The zygote divides itself almost immediately to form stem cells. These unspecialized stem cells have the ability to replicate (to form other stem cells) and to make all other specialized cells…… [Read More]
Morality of Cloning
In her book "Discovering Right and Wrong," Louis Pojman consistently makes the same point throughout her chapters: beyond all the debate and lack of consensus, and beyond all the confusion of relative morality, there should exist a true objective standard which a rational being can discover. In all her writing she seems to challenge the readers to look for objective evidence of truth, a plea which often has much in common with a more conservative position on politics and morality. When it comes to the issue of cloning, however, it seems that the search for rational objective evidence is frequently put aside in favor of often illogical "gut reactions." It is high time that a truly reasonable approach to cloning was attempted. In order to best approach this from an objectivist standpoint, it seems reasonable to backtrack to one of the founding fathers of modern objectivism, Immanual…… [Read More]
Condic, M.L. (2007, January). What We Know about Embryonic Stem Cells. First Things: A Monthly Journal of eligion and Public Life 25+.
Patel, K., & ushefsky, M. (2005). President Bush and Stem Cell Policy: The Politics of Policy Making. White House Studies, 5(1), 37+.
Pickrell, J. (2006, September). "Instant Expert: Stem Cells." NewScientist.com news service. etrieved on March 4, 2007 at http://www.newscientist.com/channel/sex/stem-cells/dn9982
Shapiro, .S. (2006). Bioethics and the Stem Cell esearch Debate. Social Education, 70(4), 203+.
Stem Cell Basics." (2006). Stem Cell Information from the National Institute of Health, U.S. Department of Health and Human Services. etrieved on March 4, 2007 at http://stemcells.nih.gov/info/basics/
Wagner, C.G. (2007, January/February). Values Conflicts in Stem-Cell esearch: Governments Struggle with Bioethical Issues. The Futurist, 41, 8+.
Precursor cells are also known as pluripotent cells, i.e., having the ability to replicate (to form other stem cells) and to make all other specialized cells that make…… [Read More]
Chimpanzees and gorillas can be taught human sign language, and sign with one another even without humans present. (MMMC, 2002) They argue that to use intelligence and compassion as a sliding scale of the right to life would cause many humans to be justified out of existence.
However, even if one accepts that too many animals are experimented upon, and researchers should use other means, it is similarly hard to justify the elimination of all animal experimentation, altogether, as this would have meant the end of such recent drug developments in AIDS research, as well as more questionable animal tests, as for instance, the use of rabbits in cosmetic testing, for which there are acceptable substitutes that do not require animals.
Bayliss, Francoise. (2004) "Our Cells/Ourselves: The Ethics of Embryonic Stem Cell Research." Stem Cell Network. Retrieved 12 Jan 2004 at http://www.stemcellnetwork.ca/research/projects/project04.php
BBC News. (Feb 12, 2004)"Q &…… [Read More]
2. Sociocultural needs. The study by Gibson and Myers examined the relationships among social coping resources, growth-fostering relationships, and infertility stress in 83 women who participated in fertility treatments at urban medical clinics. The findings of their study suggest that both social coping resources and growth-fostering relationships contribute significantly to the variance in infertility stress, with infertility stress decreasing as social coping resources increase; these findings are congruent with the findings of earlier research on the positive effects of social coping on emotional health, particularly as they concern infertile women. In addition, Gibson and Myers found that partner support and family support contribute significantly to the prediction of the variance in infertility stress. "Based on these results," they say, "it is clear that family and partner supports are very important coping resources for women coping with infertility stress" (emphasis added) (p. 69).
3. Biological needs. While the psychosocial and sociocultural…… [Read More]
But if you want a baby badly enough, you will do it" (The Women's Health Council). Women are subjected to a wide range of drugs which have harmful side effects. Some drugs induced to facilitate ovulation have also caused infertility in the male child. When women are put through the consumption of such drugs, the chances of multiple births increases, thus the woman gives birth to twins, triplets or even more.
In 2000, 53% of infants born through AT were multiple births, compared to 3% of births in the general population. The twin rate was 22 times higher than the general population; the triplet and higher multiples rate was 50 times higher. Their higher risk for birth defects and low birth weight add to already over-burdened health care costs." (Marie Anderson and John Bruchalski)
Many couples cannot afford to bring up more than one child at a time and hence…… [Read More]
Obesity in Florida
Obesity refers to when a person has more weight than it is required by his height. Excessive fats are being gathered in the body parts in a condition. It has a number of adverse effects. It has been increasing in the various countries over the recent years. Physical training and diet are done in order to prevent obesity. Sugar and fat free products are to be consumed for proper dieting (Murphy, 2012).
What facilitates obesity?
Eating a lot of junk food
Unhealthy items available in nearby markets
Lack of exercises and physical activities.
Florida ranks 27 in state ranking according to the obesity. The obesity rate in Florida is 26.1%. The percentage of males having obesity is 73.6% and the number of females having obesity is 56.5% from 2008-2010 the percentage of average adult having obesity was 26.1% and the percentage of adults who…… [Read More]
Additionally, the utilitarian position presents the advantage of objectively quantifying the interests of everyone affected by the decision, for the sole purpose of promoting common welfare. Thus, harvesting, fertilizing, genetically screening, implanting and researching human embryos at the risk of damaging or destroying them - is entirely justified from this perspective, and any progressive endeavor is encouraged.
Nevertheless, this approach might involuntarily discourage many IVF clients as it appears to be too rigid and provides them with little autonomy in making decisions regarding their own embryos. Interestingly, a utilitarian might not even support IVF treatment, due to the risks involved in the whole process - namely a large financial loss if the process should fail -, an therefore it is uncertain whether or not this infertility treatment would meet the Utilitarian requirements of avoiding pain and creating the most amount of happiness; there might be a lot of future un-happiness…… [Read More]
Review and critique of a current article relating to women's biology
How Emergency Contraception Works to Prevent Pregnancy
Emergency contraceptives are drugs used to prevent pregnancy after women indulges in unprotected sex. There is a slight difference between birth control methods and use of contraceptives in preventing unplanned pregnancy. It is significant for women and men to learn and choose the appropriate method that guarantees their well-being. Use of contraceptives prevent fertilization of the ovum, while as birth control pills prevents pregnancy, and includes use of contraceptives such as, IUDs, sterilization, and abortion. This article reviews the health effects of various emergency contraceptives on female reproductive functions. The author argues that limited knowledge about Emergency contraceptive contributes to its overuse or its underuse and enhanced knowledge could trigger development of new ways, maximize use of current methods and increase acceptability of emergency contraceptives (Berger, 2012).
Review of the…… [Read More]
Moss sex driven by scent by Gisela Telis (2012).
Mating is a natural process observed in every living thing in its own unique way. While worms can reproduce in the opposite head position, the sexual intercourse between humans is completely a different phenomenon. A similar yet different reproduction method is used by the Mosses. The article written by Gisela Telis (2012) demonstrates the recent findings on the innovative mating procedure of the Mosses. The article also compares the recent findings with the earlier studies done in previous years and is related to the field of biological psychology as it focuses upon plant evolution and the idea of pheromones.
Telis (2012) has found out that Mosses require help from tiny little creatures to play an important role in their mating procedure. Earlier it was observed and widely believed that Mosses reproduce by wind and water. In essence,…… [Read More]
The information is then transcribed into the traits and phenotypes of the offspring depending on the dominance and recessive alleles within the gene (erg, Tymoczko, & Stryer, n.d). The egg is fertilized by the sperm from the mother and their nuclei fuses together to form a zygote. The zygote contains 23 chromosomes from the mother and 23 from the father. From this combination of genes and the environmental conditions of the uterus, the traits and phenotypes of the individual are determined.
The principle of segregation for all organisms is as follows:
1. Hereditary traits are determined by specific genes. In the DNA molecule, genes are coded to specify a certain, single characteristic; this includes height, weight, eye color, etc. Any variations of the gene that correlates to the same trait are called alleles.
2. Individuals carry two genes for each trait, one from the mother's egg and one from the…… [Read More]
Varied Perspectives on Non-Surgical Sterilization Methods:
There have been varied perspectives on the use of non-surgical sterilization of the dog since these products do not entirely solve the problem of the overpopulation of dogs and cats. Additionally, the varied perspectives and arguments on the use of these methods have also been due to the fact that some people don't care since they want to breed their animals. Given that there is no secure and effective non-surgical sterilization method of the dog that has been identified and announced, the varied perspectives have continued to increase. However, there have been various approaches to identify non-surgical products though none of the products have shown tremendous results to be widely adopted and implemented (Bowen, 2006).
One of the major perspectives has been against the non-surgical sterilization of the dog since the methods that have been explored have not only been ineffective but have also…… [Read More]
The wife may wish the hospital to do something very important to her, but it is certainly not the hospital's obligation to follow those wishes. The administrator must, in this situation, weight the interests of the organization above those of the individual making the request. It must always be remembered to whom the duty of care is owed. In this case, that is the hospital. The leader may ultimately make this decision on the basis of reducing legal risk to the hospital, but the true leadership is in the rendering of that decision in such a way that all stakeholders, even the ones with the most to lose by the decision, feel confident in the person's ability to make the decision. Thus, the leader here will likely decide not to allow the posthumous sperm removal and must show strength and clarity in announcing this decision to the stakeholders in order…… [Read More]
Since the war in Iraq, thousands of American soldiers have been injured, and some of them paralyzed by explosions that shattered their spinal columns.
Traumatic paralysis is often irreversible because the network of nerves in the human spinal cord cannot repair themselves when they are badly damaged.
Applications of cloning technology will allow us to grow new nerve tissue for implantation into damaged spinal cords to restore their functions (Sagan, 1997).
Seventh Point - Cloned Human Organs Can Save Thousands of Lives Every Year:
Medical applications of cloning technology already allows doctors to grow human skin for burn victims.
The exact same technology will allow us to make human organs by actually cloning the cells from the same person to make replacement organs (Soares, 2002).
This means an end to long waiting lists for donor organs and will make the difference between life and death for thousands of people every…… [Read More]
Also, much to the distress of many homeowners (where bark scorpions also make their homes) "the bark scorpion is also one of relatively few species that are able climbers" (Gouge et.al, 2007). Because of their small size, the Bark Scorpion is sometimes called the Home Scorpion, because it is the species most commonly found in infested homes.
Another annoying feature of the pest for humans is that scorpions are immune to most pesticides. Exterminators are necessary to control them within human structures, often using the species' glow under the glare of UV light to spot them (Hedding, 2007). Furthermore, the Bark Scorpion's sociability makes the scorpion more prolific. "Scorpions have a complex mating ritual in which the male uses his pedipalps to grasp the female's pedipalps...The sperm from the male is contained within a structure called a spermatophore, which is deposited by the male on a surface over which the…… [Read More]
.. provide nourishment for the small organisms on which jellyfish feed. In waters where there is eutrophication, low oxygen levels often result, favoring jellyfish as they thrive in less oxygen-rich water than fish can tolerate. The fact is that jellyfish are increasing is a symptom of something happening in the ecosystem."
Researchers have been the ones that have as well contended that in some arias, such as the Gulf of Mexico or the Adriatic Sea, jellyfish have taken the role of fish, the former animals' number being far greater than the one of the latter's, and this can be as well put on the intensity with which the human intervene in the nature's life. Moreover, it has been observed that in the above-mentioned areas jellyfish have formed a sort of "gelatinous cover" of the water. In my opinion, this might be the reason for which during many years, Jelly researchers…… [Read More]
Do patients understand what it means to donate tissue to science? Not only that, but use of EG cells confuses stem cell research with the debate over abortion, bring up the risk of biasing emotions (McDonald 7).
So, while stem cell research is an exciting new field that holds much promise, ethical problems arise to delay research, discovery of benefits or dangers, and involve many who have no knowledge of the complexities of the field. Though controversies usually accompany new discoveries in science, this biotechnological process involves manipulating the basis of life itself in embryonic stem cells. But the field is rapidly changing. hat is true today may be outmoded tomorrow. A neutral substitute for stem cells may be discovered that will prove to be the answer to these ethical questions.
Ethics Committee of the American Society for Reproductive Medicine. "Financial incentives in recruitment of oocyte donors." Fertil…… [Read More]
These research findings were very significant because all the men who were studied in this were smokers. The researchers of this study admitted that vitamin E surely reduces the risk of prostate cancer. This study was used in a relatively low dose of 50 IU of the prostate but higher dose of 400 IU does have a greater benefit to the heart and prostate. (Challem, 37) Further a study published in the Journal Nutrition and Cancer 2000 states that natural vitamin E or d-alpha-tocopherol arrests the growth of the two types of prostate cancer cells and causes these cells to self-destruct. (Challem, 38)
However though vitamin E is a free-radical scavenger and is associated with a decreased risk of prostate cancer, men with a history of bleeding problems or who take blood thinners should surely discuss the use of vitamin E with their doctor before consuming them. (Heaney; Ellsworth; Gill,…… [Read More]
How variations arise within a phenotype?
Phenotype is the specific characteristics that are displayed by the organism. Phenotypic variation is a prerequisite for evolution due to natural selection, thus without the former, there is no latter. Qualitative traits are traits that show a difference between phenotypes like skin color, sex, and eye color. However, such descriptions are controlled by a small number of genes so environmental influence on these traits is low since it involves the genetics of individuals. Quantitative traits are traits that exhibit a continuous range from one phenotype to another. Therefore, there is no difference between phenotypes and are usually influenced by several gene pairs while the environment has a significant influence on the trait. This type of trait involves the genetics of populations. It is a combination of genetic and environmental factors to produce phenotypes that blend into each other. Phenotypic variance or VP is…… [Read More]
Legalize Marijuana Now!
Today, the United States enjoys the dubious distinction of incarcerating more of its citizens than any other industrialized nation on earth. Perhaps even more troubling still, the majority of these citizens have been imprisoned for nonviolent crimes involving drugs, with marijuana being one of the most prominently drugs. Furthermore, these issues have assumed new importance and relevance in recent years. As the country continues to struggle to recover from the Great Recession of 2008, dwindling federal and state budgets have forced lawmakers to scramble to identify ways to save money in order to turn the tide for economic recovery. One initiative that has been advanced time and again is the legalization of marijuana because it would reduce the number of people being incarcerated and help generate new tax revenues. To determine if this is the legalization of marijuana is a truly viable option, this paper provides a…… [Read More]
Freud and Surrealism
Art and science are strongly interrelated fields. It has been through the recognition of the compatibility between art and science that some of the greatest achievements in both areas have been created. It was Michaelangelo, the artist, that made revolutionary anatomical discoveries in the pursuit of art, discoveries which would become an integral part of the development of medicine. The early mapmakers were the first to create mathematical grids, and those principles would be translated into perspective and proportion for artists recreating three-dimensional objects in two-dimensional art. Along this same vein, the scientific study of the mind, psychology, has had a significant impact on art. The father of modern psychology, Sigmund Freud, discovered the metaphysical "psyche" in his search to understand the symptoms of his patients, opening up science and medicine to the world beyond the physical. Artists latched onto his theories about the importance of the…… [Read More]
Since the beginning of time the male species has had an obsession with that part of the personal anatomy known by its Latin root as the "tail"; or today known as one's pecker, "wankie," monkey, and a host of other rather humorous titles. Somewhere, however, in creating the world God must have became confused when creating man as, and being politically correct, he/she placed the tail on the man's front side and on the animals' rear side -- or maybe God just had a bad day on his/her day of creation. Regardless of what one wants to call his penis or tail, history has proven that man's obsession with the penis is ever ending. Simply consider the folklore surrounding John Dillinger whose penis was reportedly over 20 inches. If medical science were correct it would likely have taken Dillinger 20 minutes to get enough blood circulating in his penis…… [Read More]
Corrections/Police - Criminal Justice
Innocents Project Exoneration
On November 19, 1991, 14-year-old Cateresa Matthews left her great-grandmother's house in Dixmoor, Illinois. She was not seen again until December 8, 1991, when her body was found on a well-worn path running along I-57 as it passes through Dixmoor. "She had been shot in the mouth at close range with a .25 caliber pistol. She was also an apparent victim of sexual assault, as her body was naked from the waist down. A pair of white panties was found around her right ankle, and her jeans were draped across her chest. Seminal fluid was recovered from the vaginal and rectal swab of the victim" (obert Taylor, n.d).
The police made no arrests and apparently had no leads in the case for over ten months, until October 20, 1992. On that date, a police report specified that Keno Barnes, 15, supposedly…… [Read More]
Human papillomavirus (HPV) is a virus that causes warts. HPV is one of the most common sexually transmitted diseases (STDs). It belongs to the Papovaviridae family. HPV is a small oncogenic DNA virus, which infects epithelial cells of skin and mucous membranes. The epithelial surfaces include all areas covered by skin and/or mucous membranes of the mouth, genital and anus (the area that poop comes out of). A definitive diagnosis of HPV infection depends on the detection of nucleic acids (DNA or NA) or proteins.
HPV is a relatively small, non-enveloped virus, and 55 nm in diameter. It has an icosahedral capsid composed of 72 capsomers, which contain at least two capsid proteins, L1 and L2. Each capsomer is a pentamer of the major capsid protein, L1. Each virion capsid contains several copies (about 12 per virion) of the minor capsid protein, L2. The virus is said to somewhat…… [Read More]
There are two types of steroidal oral contraceptives: combination estrogen-progestin and progestin-only (Patton & Thibodeau, 2012). Combination estrogen-progestin oral contraceptives suppress the release of GnH, LH, and FSH, which inhibits the follicular development portion of the menstruation cycle; this means that no ovulation will occur. Because of this co-administration, alterations in tubal peristalsis, endometrial receptivity, and cervical mucus secretions occur, therefore preventing the egg, if it is indeed released, from implanting itself in the endometrial wall of the uterus. The thickness of the wall is determined by the release of LH and FSH during the normal menstrual cycle, however oral contraceptives inhibit this release and instead the estrogen-progestin combination control the endometrial lining directly. Estrogen thickens up the wall, however, too much estrogen alone can cause abnormal cell growth and could potentially lead to cancer; combining it with progestin helps maintain a balance and prevent too much growth of the…… [Read More]
positive and negative impacts of DNA microarrays, Genetic engineering and cloning on the society, environment and the living beings.
In the past years, people have heard much about the biological revolution and they have seen it coming too. Biology, with its modern discoveries, has not only influenced agriculture, medicine and economy but it has affected the nature of man as well. In today's era, where both, biology and technology are developing at a fast pace it is impossible for anyone to survive without having sufficient knowledge about science. The information related to scientific issues will enable the people to make good choices about their health, environment, surroundings and the society in which they reside. This information also enables the people to logically analyze different inventions and advancements in biology so that they can decide that whether the projected discovery is good for them or not. (Silva, 2008)
In the past…… [Read More]
elling Human Organs: The Ethical Issue
elling body transplants is one of the latest ventures that entrepreneurs have devised. ome see it as servicing a public good, whilst others perceive it as one more example of capitalism at its worst.
Barry Jacobs is an example of an international broker for bodily parts whose business involves matching up kidney "donors" with patients needing kidney transplants. The donor receives a magnanimous paycheck; the recipient receives a healthy kidney, and Jacobs, himself, profits by business in worse ways (Chapman, 1984). Jacobs and other advocates of organ-selling see this business as filling a necessary void. Approximately, 100,000 organ transplants are needed per annum, and only an annual 10,000 are performed due to the deficiency of matching organs. Biomedical breakthroughs have increased the success of these operations, but the procedures cannot always be accomplished due to depletion of stocks. People are simply not willing to…… [Read More]
Bioluminescence can be discovered across an extensive selection of some of the key categories of organisms. This includes classifications such as bacteria and protists and also squid as well as ?she's, with numerous phyla amid them. In many of these organisms, luminescence is made by these organisms themselves and never by bacterial symbionts. A few organisms in this category that are not considered to be self-illuminescents are (1) terrestrial vertebrates, such as birds, mammals and amphibians (2) ?owering plants. Luminescence is usually higher in deep-living species along with planktonic ones than in shallow organisms (Haddock et al., 2010).
A summary of known luminous organisms had been documented by Herring (1987). However, since that time there have been a number of new discoveries of luminous organisms. In some instances, it is very difficult to determine that the species are nonluminous. Amid ?lter-feeding species, luminescence is very difficult to inspect.…… [Read More]
Sex and Culture
What are the advantages and disadvantages of sexual reproduction (animal/human world)?
Sexual reproduction is an evolutionary phenomenon, which entails the cooperation of two species: the male and the female. In any aspect of sexual reproduction, the energy of male spermatozoa and the female oocyte must both be expended in order to reproduce, as opposed to the efficient method of asexual reproduction, which only involves the singular (female) organism. Furthermore, sexual reproduction has a failing in that humans and animals tend to reproduce much less than organisms that reproduce asexually. However, this evolutionary method of reproduction allows for genetic variation and adaptable feasibility. The offspring of the sexually reproductive parents will have gained half of the mother's genetic characteristics and half of the father's genetic characteristics. Genetic variation increases the immunity against otherwise deadly genetic diseases.
Is the capacity that female primates have for orgasm detrimental to their…… [Read More]
Jerry Coyne's hy Evolution is True
I understand it contradicts the account in the Bible and other holy texts, if one takes a literalist interpretive stance, but given that most texts have more significant internal conflicts, I did not see why this particular theory would cause people to have such visceral emotional responses. I understand, intellectually, that evolution is not the first scientific advance to be met with tremendous hostility; there was also significant opposition to the notion of a heliocentric universe and to the idea that the earth was not flat. However, because people understand that other scientific ideas that were intertwined with biblical teachings have been proven incorrect before without damaging religious belief, I imagine that I assumed that people would be more open-minded about "modern" scientific theories. On the contrary, because of the strong scientific support for the idea of evolution, the choice not to believe evolution…… [Read More]
Klinefelter syndrome is a genetic condition where a male child is born with an extra X chromosome, so that his sex chromosomes are XXY rather than XY; some people with Klinefelter syndrome have more than two X chromosomes. Klinefelter syndrome is the result of random error and is not a heritable disease. While many people think of the X chromosome as solely a sex chromosome, it plays a significant role in bodily functioning, impacting brain development and growth in addition to sexual functioning. Mental retardation and phenotypic abnormalities are associated with Klinefelter syndrome and are "directly related to the number of supernumerary X chromosomes (Chen, 2013). Klinefelter syndrome is a "form of primary testicular failure, with elevated gonadotropin levels due to lack of feedback inhibition by the pituitary gland" (Chen, 2013). This results in an androgen deficiency that causes many of the symptoms associated with Klinefelter's syndrome. Other hormone levels…… [Read More]
Diversity and Organisms
Phylogeny is the patterns of lineage branching, produced by the true evolutionary history of the organisms being considered (UCMP Web site). Speciation is the changes in related organisms to the point where they are different enough to be considered separate species. This occurs when populations of one species are separated and adapt to their new physiological, geographic, or behavioral environment (Evolution Library Web site).
Plants have a reproductive cycle, which has an "alternation" between a haploid (n=one copy of each chromosome) gametophyte generation and a diploid (2n=two copies of each chromosome) sporophyte generation. The haploid gametophyte produces haploid gametes, which fuse to form a diploid zygote. The zygote grows by mitosis into the diploid multicellular sporophyte, in which meiosis occurs in special regions creating haploid spores. The spores disperse, germinate into haploid gametophytes starting the cycle anew (Kennesaw Web site).
As plants have evolved, the sporophyte has…… [Read More]
Region of Megalopolis (urban area in Northern America) and its sub-Region of Nantucket (off Cape Cod)
This paper describes the geographic region of Megalopolis (urban area in Northern America) and its sub-region of Nantucket (off Cape Cod). It also deals with the history of Nantucket and the causes that led to the formation of the megalopolis in northeastern USA. Megalopolis comes from the Greek words for 'very large' (Mega) and city (polis). It basically means a very large city. Jean Gottmann, a Frenchman, coined this term to refer to northeastern USA extending from oston to Washington DC. The idea of Megalopolis existed in Ancient Greece where they attempted to create a very large city in the Peloponnese Peninsula. Their attempt was unsuccessful but the small city of Megalopolis that they created still exists. The concept of Megalopolis lies in the fact that cities are not viewed as individual units but…… [Read More]
Filtration-Based DNA Preparation for Sexual
Assault Cases. Journal of Forensic Science 9/2003 Vol.48, No.
The precision of DNA technology allows law enforcement authorities to definitively identify perpetrators of sexual assaults from microscopic amounts of their
DNA collected from victims using a cotton swab. It has enabled the FBI to establish the Combined DNA Index System ("CODIS"), a nationwide DNA data bank and identification system modeled in principle, after the AFIS automatic fingerprint identification system.
It is estimated that crucial DNA evidence collected in approximately half a million unsolved rape cases awaits scientific processing, partly because of the complexity and time consuming nature of technical aspects of the techniques involved. The U.S. House of Representatives has already passed legislation in the form of the DNA Sexual Assault Justice Act that would allocate a quarter of a billion dollars to the problem. The Senate is expected to do likewise.
Chief among the…… [Read More]
DEFENDING a OMEN'S RIGHT TO CHOOSE ABORTION
Abortion, or the elective termination of pregnancy likely predates recorded human history, being practiced within virtually every society throughout the world.(6)
In 1973, the United States Supreme Court very specifically decided that the United
States Constitution affords a fundamental right to individual privacy that absolutely prohibits governmental interference with a women's autonomous right to seek medical termination of unwanted pregnancy, except where deemed necessary to safeguard the woman's health paternalistically.(4) Ever since the legal issue was decided by the Supreme Court in 1973, a so-called pro-life lobby, spearheaded by religious opposition to any type of abortion has campaigned for and funded the proposition of legislation and policies designed to undermine the rights recognized and established under constitutional law in the United States.
Ultimately, the United States Constitution requires that the appropriate guidelines for defining legally permissible abortion rights and relative concern for the…… [Read More]