HISTOLOGY
INTEGUMENTARY SYSTEM SKIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Racial variations in skin color are determined by
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the number of melanocytes.
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the amount and type of melanin produced.
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the distribution and deposition of melanin.
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Both “the number of melanocytes” and “the distribution and deposition of melanin produced” are correct.
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Explanation:
Detailed explanation-1: -Pigmentation of the skin results from the accumulation of melanin-containing melanosomes in the basal layer of the epidermis. Differences in skin pigmentation result both from the relative ratio of eumelanin (brown–black) to pheomelanin (yellow–red), as well as the number of melanosomes within melanocytes.
Detailed explanation-2: -A person’s skin color is determined primarily by the proportion of eumelanin to pheomelanin, the overall amount of melanin produced, and the number and size of melanosomes and how they are distributed. People with naturally darkly pigmented skin have melanosomes that are large and filled with eumelanin.
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