Question

which cell type functions in initiating an immune response against pathogens invading the epidermis?
melanocytes
langerhans cells
merkel cells
keratinocytes
i dont know yet

Explanation:

Melanocytes produce melanin (pigment). Merkel cells are for touch sensation. Keratinocytes form the epidermal barrier. Langerhans cells are dendritic cells in the epidermis that initiate immune responses against pathogens.

Answer:

B. Langerhans cells