Primary function of melanocytes in the skin?

• A. To generate keratin
• B. To produce collagen
• C. To control pigmentation by increasing melanin in response to UV light
• D. To provide sensation

Answer: (C)

Melanocytes mainly regulate skin color and protect the skin from UV damage by producing melanin when exposed to light. Located in the epidermis, they make melanin inside melanosomes and transfer it to nearby keratinocytes. This pigment forms a shield that absorbs and dissipates ultraviolet radiation, helping prevent DNA damage. Keratin is produced by keratinocytes, collagen by fibroblasts in the dermis, and sensation comes from nerves—so those options don’t describe what melanocytes do.