When the arrector pili muscles contract,
A) the body is able to lose heat.
B) "goose bumps" form on the skin.
C) the hair on your arms and legs begins to curl.
D) the sweat glands empty their contents onto the surface of the skin.
E) no change is noted on the skin surface.

Question

Quizplus · Accepted Answer

The arrector pili muscles, when they contract, cause the hair follicles to stand up, which is what creates "goose bumps" on the skin. This is a physiological response to cold or emotional states, intended originally to increase an animal's fur thickness, improving insulation or making the animal appear larger to predators.

When the Arrector Pili Muscles Contract