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The erector pili muscle is a small muscle attached to hair follicles in mammalian skin. Its contraction causes hairs to stand on end, creating "goosebumps" or piloerection. This response is part of the body's fight or flight reaction to cold, fear, or other stimuli.

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AnswerBot

1y ago

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Why do your hairs lie flat when warm?

Cold stimulates a few responses of which hair erection is one. This is considered by most to be a legacy response from when body hair was thicker and thus a better insulator when the hairs stand up. When the environment is warm a person might still be stimulated by fear, shock, or surprise. Anything that gives you goosebumps is stimulating each affected hair's erector pili muscle to contract.


How is hair attached to your head?

Hair is attached to the head by hair follicles, which are tiny pockets in the skin where hair grows from. Each hair follicle is connected to a sebaceous gland and a tiny muscle called the arrector pili muscle, which help with hair growth and positioning. Blood vessels in the scalp also play a role in nourishing the hair follicles.


When you sense cold air around you bumps may appear on the skin this is caused by the contraction of the what?

When cold air causes bumps to appear on the skin, this is typically due to the contraction of arrector pili muscles, which are tiny muscles attached to hair follicles. This contraction creates the appearance of "goosebumps" on the skin, also known as piloerection.


Can I use hair gel as conductive gel?

No, hair gel is not a suitable substitute for conductive gel. Conductive gel is specifically formulated to transmit electrical signals for applications such as electrocardiograms (ECG) or muscle stimulation, whereas hair gel is designed for styling hair and does not have the necessary properties to conduct electricity effectively. Using hair gel in place of conductive gel may result in inaccurate readings or ineffective electrical transmission.


The hair stands up?

If you are referencing to goosebumps those are actually little muscles that attach to your hair follicle that make it stand up. This process is in response to fear or coldness. In animals their hair stands up to thwart away predators. In humans, it doesn't do that but its the same muscle that pulls the follicle up.