When the arrector pili muscles contract
A)the body is able to lose heat.
B)no change is noted on the skin surface.
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)"goose bumps" form on the skin.

Question

Quizplus · Accepted Answer

When the arrector pili muscles contract, they pull on the hair follicles, causing the hair to stand upright. This results in small bumps on the skin surface, commonly called "goose bumps." It is believed that this reaction is a vestigial response to cold or fear, as it helps to increase the insulation of body hair or make an animal appear larger and more intimidating.

When the Arrector Pili Muscles Contract