NUTRITION
THE HUMAN BODY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Hair grows from magic beans
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Hair is a living cell that grows from pores.
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Hair grows from follicles. The cells divide and push hair shaft up. The cells die and fill with keratin.
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Hair grows from your scalp and dies.
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Detailed explanation-1: -Similar to the skin, hair forms by rapid division and differentiation of stem cells which form keratinocytes that migrate, flatten, and die, forming keratinized cells. The final hair product that is exposed on the surface of the skin will be composed entirely of keratin. The growth of the hair follicle is cyclical.
Detailed explanation-2: -As they move up, they’re cut off from their supply of nourishment and start to form a hard protein called keratin. This process is called keratinization (pronounced: ker-uh-tuh-nuh-ZAY-shun). As this happens, the hair cells die. The dead cells and keratin form the shaft of the hair.
Detailed explanation-3: -Hair grows because matrix cells shed some of their structure as they reach the upper follicle. The shed structure combines with keratins to form hair strands that exit your skin’s surface.
Detailed explanation-4: -Hair is a filamentous biomaterial consisting mainly of proteins in particular keratin.