The "tanning" effect (darkening of the skin) that occurs when a person is exposed to the sun is due to the increased presence of ________.

Question

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Melanin is the pigment that gives color to the skin, and it is produced by specialized cells called melanocytes. When the skin is exposed to UV radiation from the sun, melanocytes produce more melanin to protect the skin from further damage. This extra melanin gives the skin a darker color, which is commonly referred to as a "tan."

The "Tanning" Effect (Darkening of the Skin) That Occurs When