HISTOLOGY
INTEGUMENTARY SYSTEM SKIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The waterproofing tough protein that fills the cells in the upper layers of the epidermis, and also found in the the hair and nails.
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Keratin
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Carotene
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Melanin
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None of the above
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Explanation:
Detailed explanation-1: -Keratinocytes produce keratin, a tough, protective protein that makes up the majority of the structure of the skin, hair, and nails.
Detailed explanation-2: -Hair is composed of 95% keratin, a fibrous and helical protein (in the shape of a helix), which is part of the composition of the skin and of all the phanera (hair, nails, etc.). Synthesized by keratinocytes, keratin is insoluble in water, thus ensuring waterproofing and protection for hair.
Detailed explanation-3: -Cells in the epidermis contain a structural matrix of keratin, which makes this outermost layer of the skin almost waterproof, and along with collagen and elastin gives skin its strength.
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