Which cells are responsible for the production of skin pigment granules?

• A. Keratinocytes
• B. Fibroblasts
• C. Melanocytes
• D. Lymphocytes

Answer: (C)

Melanocytes are specialized cells located primarily in the basal layer of the epidermis, and their primary function is the production of melanin, the pigment responsible for the color of the skin, hair, and eyes. These cells produce melanin granules, known as melanosomes, which are then transferred to surrounding keratinocytes. This transfer helps to protect the skin from UV radiation and contributes to the overall pigmentation of the skin.

Keratinocytes, while essential for forming the outer layer of skin and providing a barrier against environmental damage, do not produce skin pigment granules. Instead, they rely on the melanin produced by melanocytes for pigmentation. Fibroblasts are connective tissue cells primarily involved in the synthesis of collagen and extracellular matrix, playing a key role in skin structure but not in pigmentation. Lymphocytes are a type of white blood cell involved in the immune response and are not related to pigment production in the skin.

Thus, the function and role of melanocytes in producing melanin specifically identifies them as the correct choice in the context of skin pigmentation.