Please indicate which choice is the best answer and explain your reasoning. Amer
ID: 211376 • Letter: P
Question
Please indicate which choice is the best answer and explain your reasoning.
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.
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.
Explanation / Answer
Option " C " is the right answer. As pika had high basal metabolic rate and high body temperature , T3 stimulates mitochondria for the consumption of oxygen and increase metabolic rate and increase temperature. T3 and T4 involve in breathing , metabolism , heart rate , body weight , body temperature , growth , digestion etc.