Question 31

Melanocytes transfer pigment granules to adjust epidermal cells.

Melanocytes are specialized cells responsible for producing and transferring pigment granules, known as melanin, to epidermal cells. This process is crucial for determining skin color and protecting against UV radiation.

A) Merkel Cells

Merkel cells are mechanoreceptors located in the skin that are primarily involved in the sensation of touch. They do not play a role in pigment transfer or production, making this option incorrect.

B) Keratinocytes

Keratinocytes are the predominant cells in the epidermis and are responsible for forming the skin barrier and producing keratin. While they receive melanin from melanocytes, they do not transfer pigment granules themselves, which disqualifies this option.

C) Langerhans cells

Langerhans cells are immune cells found in the epidermis that play a role in the skin's immune response. They are not involved in the production or transfer of pigment granules to epidermal cells, rendering this option incorrect.

D) Melanocytes

Melanocytes are the correct choice as they specifically produce melanin and transfer pigment granules to keratinocytes in the epidermis. This transfer is essential for pigmentation and protection against UV radiation.

Conclusion

Melanocytes are uniquely equipped to produce and distribute melanin, making option D the only correct choice in this context. The other options do not fulfill the role of pigment granule transfer, highlighting the distinct function of melanocytes in skin pigmentation.