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Deliberately reducing the amount of PO2 circulating in the breathable atmosphere around a person -- such as Kara accomplishes at sea-level with her tent -- ultimately produces a lowered rate of hemoglobin oxygenation in the arterial blood. This condition, hypoxia, can be dangerous and can, of course, impair aerobic physical exercise -- however the trick that Kara is taking advantage of is the body's ability to undergo acclimatization, in which the body's physiology and metabolism will engage in adjustments that improve the body's ability to tolerate the low-PO2 levels through different means, such as adjusting its own acidity (to change the level of interior biochemical reactivity in order to boost absorbable oxygen levels) but also -- more importantly for Kara and her endurance training -- by improving metabolism on the cellular level and blood circulation (to maximize the value of the oxygen actually obtained) and, most importantly, by...
609). Oxygen, of course, binds to the iron in hemoglobin and is then transported throughout the body to be used -- Kara's interest is its use by those muscles most heavily used in her running. As a result of this training, when Kara comes into the more PO2-rich atmosphere of New York City for her marathon, she will have trained her body to extract more from the available oxygen in the atmosphere (mostly from the hemoglobin boost but also from the metabolic, circulatory, and acidity adjustments), and thus permit her to exercise with a higher level of endurance.
References
McCardle, WD, Katch, F, and Katch, VL (2009). Exercise physiology. 7th ed. New York: LWW.
Murphy, K. (2011). Janeway's immunobiology. 8th ed. New York: Garland Science.
B-Thalessemia Hello, Mr. And Mrs. Jones. You came to us because you each have relatives with B-thalessemia. You wanted to know what the chances were that you would have children with this disease. The only way a baby can be born with B-thalessemia is if both parents carry the gene for it. At conception, each child receives one set of genes from each parent. Because each of you received one gene for B-thalessemia,
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The world heath today is experiencing of cancer as a very dangerous disease. This illness often affects those individuals who are 65 years of age and above. Other predisposing factors are being an African -American and being from a family whose members have been suffered this kind of illness. Cancer can start from any part of the body as it starts it growth in cells. This can spread to other
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