In response to hot temperatures,animals
A) perspire or pant and dilate blood vessels.
B) perspire or pant and constrict blood vessels.
C) increase thyroid activity.
D) stimulate brown fat activity.

Question

Quizplus · Accepted Answer

Animals typically respond to hot temperatures by perspiring or panting (or other forms of evaporative cooling) and dilating blood vessels to increase blood flow to the surface of the skin, which helps dissipate excess heat. Constricting blood vessels would actually limit blood flow, which would be counterproductive in this context. Increasing thyroid activity and stimulating brown fat activity may also play a role in thermoregulation, but they are not the most direct or immediate responses to hot temperatures.

In Response to Hot Temperatures,animals