PATHOLOGY MCQ
SKIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What selective advantage did people have to lose increased melanin production? (Or in other words, to have less melanin?)
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Increased protection from skin cancer
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Increased protection from folate destruction
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Increased synthesis of vitamin D
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All of the above
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Explanation:
Detailed explanation-1: -Skin pigmentation, i.e., melanin, absorbs the UVR that initiates vitamin D synthesis, and hence decreases the vitamin D that is made for a given exposure compared to less pigmented skin.
Detailed explanation-2: -In light skin, the ultraviolet radiation penetrates more into the skin, developing a better absorption of ultraviolet radiation. Their body synthesizes a higher amount of vitamin d, and they help in calcium development. They have less chance of developing rickets in their body.
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