"Goose bumps" on the skin are due to action of the
A) arrector pili muscles.
B) sweat glands.
C) sebaceous glands.
D) flexion creases.

Question

Quizplus · Accepted Answer

"Goose bumps" on the skin are caused by the action of the arrector pili muscles. These muscles are involuntary and contract in response to cold temperatures or emotional states such as fear or excitement. When they contract, they pull on the hair follicles, causing the hair on the skin to stand up, resulting in the appearance of "goose bumps."

"Goose Bumps" on the Skin Are Due to Action of the