A bundle of smooth muscle cells, forming the arrector pili muscle, attaches to each hair follicle and causes goosebumps.

INTEGUMENTERY SYSTEM MISCELLENOUS

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	true
B	false
C	Either A or B
D	None of the above

Explanation:

Detailed explanation-1: -Arrector pili muscles are tiny muscles attached to follicles of hair in mammals. Contraction of these muscles causes hairs to stand on end also known as goosebumps. Each arrector pili muscle is composed of a bundle of smooth muscle fibers that attach to several follicles.

Detailed explanation-2: -The arrector pili muscle (APM) consists of a small band of smooth muscle that connects the hair follicle to the connective tissue of the basement membrane.

Detailed explanation-3: -A small bundle of smooth muscle cells called the arrector pili ("hair erector") is attached to the connective tissue sheath around each hair follicle.

There is 1 question to complete.