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How does altitude acclimation affect the metabolic potential of muscle?

a) maintained
b) enhanced by approximately 10%
c) enhanced by approxiamtely 25 %
d) diminished

2 Answers

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Final answer:

Altitude acclimation generally results in a diminished metabolic potential of muscle due to lower oxygen availability, so the correct answer is d) diminished. Aging leads to a decline in the body's metabolic rate, largely because of reduced lean muscle mass. Additionally, a decreased pH of the blood can inhibit the transfer of oxygen to tissues.

Step-by-step explanation:

How does altitude acclimation affect the metabolic potential of muscle? Altitude acclimation can lead to a physiological adjustment called hypoxia-inducible factor (HIF) pathway activation, which eventually enhances the efficiency of the muscles at higher altitudes. However, in the context of absolute metabolic potential, acclimation to high altitude is generally associated with a diminished metabolic potential of muscle due to reduced oxygen availability. The correct answer is d) diminished.

One of the consequences of aging is a decrease in the body's metabolic rate. As we age, there is a natural decline in metabolic rate by nearly 2 percent per decade after age 30, largely due to changes in body composition, including reduced lean muscle mass. The most dramatic loss of muscle mass, and consequently metabolic rate, occurs between the ages of 50 and 70.

Regarding the transfer of oxygen to tissues, certain factors can inhibit this process. A decreased pH of the blood, which can be a result of increased carbon dioxide levels or lactic acid, can indeed hamper the delivery of oxygen to tissues since it affects the affinity of hemoglobin for oxygen. Therefore, b) decreased pH of the blood is the correct answer to which factor will not facilitate the transfer of oxygen to tissues.

User Zeytin
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Final answer:

Altitude acclimation can potentially enhance the metabolic potential of muscle due to physiological adaptations, like increased red blood cell production and mitochondrial efficiency. While it is unlikely to be as high as 25%, a 10% enhancement can be considered more realistic based on current scientific understanding. Aging and exercise also play significant roles in the metabolic potential of muscles. The correct option is here b) enhanced by approximately 10%.

Step-by-step explanation:

The question as to how altitude acclimation affects the metabolic potential of muscle pertains to the physiological responses the body goes through when exposed to high-altitude environments. At high altitudes, oxygen levels are lower, which can initially lead to a decrease in the muscle's ability to produce energy. However, with proper acclimation, the body adapts by producing more red blood cells to improve oxygen delivery to tissues, enhancing the efficiency of the muscles' mitochondria and increasing the capacity for the muscle to generate ATP, the energy currency of cells. As a result of these adaptations, the metabolic potential of muscle after acclimation can be maintained or potentially enhanced.

Among the choices given, the more widely accepted and scientifically confirmed outcome is that the metabolic potential of muscles can be enhanced due to increased efficiency in oxygen usage and energy production after acclimation to high altitudes. Enhanced metabolic potential, however, would unlikely be as high as 25%. Therefore, of the options provided, 'enhanced by approximately 10%' could be considered the more realistic choice if assuming there is an enhancement at all. Actual enhancement may vary between individuals and depending on the duration and nature of the acclimation process.

It is important to note that other factors such as decreased body temperature, decreased pH of the blood, increased carbon dioxide, and increased exercise can influence the transfer of oxygen to tissues. Aging and the resulting loss of muscle mass also significantly impact the body's metabolic rate and consequentially the metabolic potential of muscles. With aging, especially between the ages of 50 and 70, there can be a dramatic decline in metabolic rate due to muscle loss. When considering altitude acclimation in the context of exercise, it's relevant to note that exercise can lead to an increase in body temperature, consistent with individual experience during physical activity.

User Steve Hart
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