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Arrector glands, more commonly referred to as arrector pili muscles, are small muscles located at the base of hair follicles in mammals. When these muscles contract, they cause the hair to stand upright, a phenomenon known as piloerection, which can occur in response to cold temperatures or emotional stimuli. This response is often associated with "goosebumps." While these muscles play a role in thermoregulation and social signaling, they do not have significant functionality in humans compared to other animals.
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What parts of the body receive only sympathetic fibers?
adrenal medulla, sweat glands, arrector pili muscles of the skin, kidneys, most blood vessels
What part of the body receives sympathetic fibers?
adrenal medulla, sweat glands, arrector pili muscles of the skin, kidneys, most blood vessels
Are sebaceous glands and hair and arrector pili and epidermis in the same grouping?
Sebaceous glands, errector pili, and hair are all accessory organs or appendages of the skin that are rooted in the dermis. The epidermis is a layer of the skin, and is on top of and separate from the dermis.
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 are the follicles composed of?
Follicles are composed of hair, sebaceous glands, and arrector pili muscles. The hair follicle is a tunnel-like segment of the epidermis that extends down into the dermis of the skin.
What is a bundle of smooth muscle cells attached to hair follicles?
arrector pili.
What is the dermal papilla nourished by?
arrector
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.
How does the arrector pili muscle cause shivering?
The arrector pilli does not cause shivering - it's responsible for "goosebumps".. shivering is caused by skeletal-muscles..
Is arrector pili voluntary or involuntary?
involuntary
What muscle moves your hair?
arrector pili
What kind of muscle can move a hair?
arrector pili
