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homework help 2935

homework help 2935.

The arrector pili consists of smooth muscle tissue.

It consists of narrow diamond-shaped cells with a single, centrally located nucleus. Each cell must be separately stimulated by nerves of the autonomic in order to contract.

The arrector pili (“raiser of the hair”) is a band of muscle tissue that connects a follicular unit to the dermis.

Contraction of the arrector pili is involuntary.

Stresses such as cold and fear may stimulate the autonomic nervous system and cause contraction — making the hair stand on end.

In humans, the result is called goose bumps.

homework help 2935

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