Question

Question 17
When an endothermic animal is hot so that its body temperature increases above a critical temperature, which of the following best describes the likely effect on metabolic rate?

Metabolism is higher because the animal is working harder to maintain an optimal body temperature when it is hot.
Metabolism is lower because the external environmental temperature is too hot relative to the animal's preferred body temperature.
Metabolism remains unchanged irrespective of differences in body temperature.
Metabolism remains unchanged irrespective of differences in environmental temperature.

Answer 1

B) Metabolism is lower because the external environmental temperature is too hot relative to the animal's preferred body temperature.

Explanation: Endothermic animals are the animals that are able to maintain a constant body temperature regardless of their ambient temperature.

Endotherms generate most of the heat they need internally. When it's cold out, they increase metabolic heat production to keep their body temperature constant. Similarly when there is hot, they decrease the heat production by decreasing the rate of metabolism