Previous Quesion : American pika are small mammals that are related to rabbits a

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Previous Quesion :

American pika are small mammals that are related to rabbits and usually live above the tree line in the mountains of western North America. Pika are herbivores that maintain a high basal metabolic rate and high body temperature as adaptations to living at high elevations in the mountains where temperatures are cold. If you were to measure the levels of T3 and T4 hormones in pika, what would you predict?

A. Pika are herbivores, therefore their adaptation to their diet must be through a specialized digestive tract, therefore I would predict that the levels of T3 and T4 hormones would be similar to other rabbit relatives.

B. Pika live above tree line and must hibernate, therefore I would predict that the levels of T3 and T4 hormones would be similar to other rabbit relatives during the summer months.

C. Pika have a high basal metabolic rate to maintain a high body temperature, therefore I would predict that the levels of T3 and T4 hormones would be higher than expected for a mammal their size.

D. Pika have a high basal metabolic rate to maintain a high body temperature, therefore I would predict that the levels of T3 and T4 hormones would be lower than expected for a mammal their size.

Correct answer C

Following Question that I need help answering: Thepreviousslidecontainsaquestionaboutathe metabolism of the American pika, a small mammal living at high elevation. Suppose that this animals thyroxine hormone levels were exactly the same as most mammals of a similar size living in warmer habitats but its BMR was much higher. Using your knowledge of how hormones interact with cells, propose and explanation of how the BMR could be higher even though the thyroid hormone levels are the same.

American pika are small mammals that are related to rabbits and usually live above the tree line in the mountains of western North America. Pika are herbivores that maintain a high basal metabolic rate and high body temperature as adaptations to living at high elevations in the mountains where temperatures are cold. If you were to measure the levels of T3 and T4 hormones in pika, what would you predict?

A. Pika are herbivores, therefore their adaptation to their diet must be through a specialized digestive tract, therefore I would predict that the levels of T3 and T4 hormones would be similar to other rabbit relatives.

B. Pika live above tree line and must hibernate, therefore I would predict that the levels of T3 and T4 hormones would be similar to other rabbit relatives during the summer months.

C. Pika have a high basal metabolic rate to maintain a high body temperature, therefore I would predict that the levels of T3 and T4 hormones would be higher than expected for a mammal their size.

D. Pika have a high basal metabolic rate to maintain a high body temperature, therefore I would predict that the levels of T3 and T4 hormones would be lower than expected for a mammal their size.

Correct answer C

Following Question that I need help answering: Thepreviousslidecontainsaquestionaboutathe metabolism of the American pika, a small mammal living at high elevation. Suppose that this animals thyroxine hormone levels were exactly the same as most mammals of a similar size living in warmer habitats but its BMR was much higher. Using your knowledge of how hormones interact with cells, propose and explanation of how the BMR could be higher even though the thyroid hormone levels are the same.

Explanation / Answer

BMR is mainly regulated by the thyroxine level in our body but it can vary among individuals having the same thyroxine level due to following reasons-
BMR is affected by stress level of the body, temperature of the surrounding, age, body mass, illness, food consumed, etcetera.

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