The higher level of metabolic activity typical of nonhibernating temperate mammals during the winter months is due to increased secretion of
A) ecdysone.
B) glucagon.
C) thyroxine.
D) oxytocin.
E) growth hormone.

Question

Quizplus · Accepted Answer

The secretion of thyroxine increases metabolic rate, resulting in increased metabolic activity in nonhibernating temperate mammals during the winter months.

Answer: B, C, E 
 Glucagon, thyroxine, and growth hormone all play a role in regulating metabolic activity. Glucagon helps to release glucose into circulation to be used for energy, while thyroxine and growth hormone increase metabolic rate. However, choice C (thyroxine) is the most specific and accurate answer to the question.

The Higher Level of Metabolic Activity Typical of Nonhibernating Temperate