Good Bacteria And Bad Bacteria Term Paper

Length: 2 pages Sources: 1+ Subject: Disease Type: Term Paper Paper: #2437025 Related Topics: Ebola Virus, Meningitis, Infectious Disease, Malaria
Excerpt from Term Paper :

Environmental Hazards

What are toxicants and how do they affect living organisms?

According to Dr. Celine Godard, toxicants and toxins both reference substances that are toxic; however, toxins are made in nature (like in poisonous mushrooms or in the poisonous venom that snakes use to kill their prey) and toxicants are human made (Godard, et al., 2001). Examples of toxicants would be "industrial waste products and pesticides" -- along with pollutants that get into the oceans. In fact pesticide residues (toxicants) are found in the ocean, and Godard's article in the Public Broadcast Service (PBS) is about how the Ocean Alliance is researching the impacts that toxicants have on sperm whales.

Sperm whales are exposed to the pollution (toxicants) that humans allow to flow into the oceans, and the whales have a "layer of fat called blubber" beneath their skins; Godard explains that toxicants accumulate in fatty tissue and so the longer the whale lives, the more toxicants accumulate in its blubber (body). This accumulation of toxicants in a whale's body is called "bioaccumulation" -- and sperm whales are also subject to "biomagnification" (Godard, p. 2). Biomagnification is the magnifying effect that toxicants...

...

A fish that eats ten shrimp (and each shrimp has 1 unit of a toxicant), and in turn if a bigger fish eats ten of the smaller fish, the bigger fish now has "100 units of toxicants" in its body (Godard, p. 2).

What are disease-causing agents? Select two agents -- describe their effects and how they are transmitted:

Disease-causing agents are actually "biological pathogens" that spread disease, and those pathogens can find their way into the human body through a number of ways (Education Portal). The two agents to be discussed are viruses and bacteria. Viruses are the most common kind of disease-causing agent -- or at least the agent that most people come into contact with and are familiar with. Viruses can cause the flu, and chicken pox, West Nile disease HIV, and other diseases once they get into your blood stream (Education Portal). Hepatitis A is also a virus, and it causes liver failure; echoviruses can cause meningitis.

There is good and bad bacteria; the Education Portal reports that most bacteria that humans come into contact with are not necessarily harmful -- in fact, many…

Sources Used in Documents:

Works Cited

Education Portal. (2011). Disease-Causing Agents in the Environment: Definition and Types.

Retrieved November 7, 2014, from http://education-portal.com.

Godard, C. (2001). The Toxicant Build-up. KCET / PBS. Retrieved November 7, 2014, from http://www.pbs.org.

World Health Organization. (2012). Global Climate change and Human Health. Retrieved November 7, 2014, from http://www.who.int.


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