When the Arrector Pili Eye Muscles Contract?

Arrector Pili Muscle - This is a tiny muscle that attaches to the base of a hair follicle at one end and to dermal tissue on the other end. In order to generate heat when the body is cold, the arrector pili muscles contract all at once, causing the hair to "stand up straight" on the skin.

What causes arrector pili muscles to contract?

Function. The contraction of the muscle is involuntary. Stresses such as cold, fear etc. may stimulate the sympathetic nervous system, and thus cause muscle contraction.

What happens when the arrector pili muscles contract quizlet?

What occurs when the arrector pili muscles contract? Your hair stands!! Also known as Goosebumps that appear on skin.