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What are the smooth muscle cells that stand hairs on end in response to cold known as?
Those are known as arrector pili muscles. They are responsible for contracting and causing hairs to stand up in response to cold or emotional stimuli.
What is pili pili?
An arrector pili is any of a group of small muscles attached to hair follicles in mammals, the contraction of which causes the hairs to stand on end.
Does the arector pili muscles receive direct parasympathetic innervation?
Arector pili muscles get innervation from sympathetic out flow. But the neurotransmitter is acetylcholine. So functionally the nerve supply is parasympathetic.
Can you make the hairs on your arm stand on end?
Standing hair is caused by the tiny muscle that connects the hair to the follicle. This muscle is called the arrector pili.
What causes hair to stand on end and goose bumps to appear?
When you are cold or scared, tiny muscles called arrector pili contract, causing hair to stand up and creating goose bumps on your skin.
Are arrector pili and epidermis related?
The arrector pili and epidermis are related only in that the action of the arrector pili causes "goosebumps" to form at the epidermis.
What is a bundle of smooth muscle cells attached to hair follicles?
arrector pili.
What are the muscles that cause the hair to raise when stimulated?
Arrector pili is the muscle the raises hair. This is taught in health class.
Is arrector pili voluntary or involuntary?
involuntary
What muscle moves your hair?
arrector pili
What kind of muscle can move a hair?
arrector pili
Where are arrector pili's located?
Within the hair follicles.
Contraction of the arrector pili would be sensed by?
hair follicles
What structure pulls the hair into an upright position?
arrector pili
When arrector pili muscles contract?
''goose bumps'' are formed
What make your hair stand on end?
Arrector Pili Muscle
What muscle cause goose bump?
The Arrector Pili muscle
