PATHOLOGY MCQ
SKIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Muscles pull hair up to trap air when
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It is cold outside
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It is hot outside
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It is humid outside
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Michael Myers is outside your window
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Explanation:
Detailed explanation-1: -Goosebumps occur when tiny muscles in our skin’s hair follicles, called arrector pili muscles, pull hair upright. For animals with thick fur, this response helps keep them warm.
Detailed explanation-2: -When too cold: the hair erector muscle contracts, raising the hair. the hairs trap a thicker layer of air above the skin. the air insulates the skin against heat loss.
Detailed explanation-3: -Arrector pili muscles are enwrapped by sympathetic pilomotor nerves, which release the neurotransmitter norepinephrine (NE) to trigger muscle contraction and cause hairs to become erect in response to cold.
There is 1 question to complete.