Question

which epidermal cell is responsible for activating the immune system by ingesting foreign invaders? melanocytes tactile epithelial (merkel) cells keratinocytes dendritic (langerhans) cells

Explanation:

Dendritic (Langerhans) cells are antigen - presenting cells. They ingest foreign invaders (antigens), process them, and present them to T - lymphocytes, thus activating the immune system. Melanocytes produce melanin for skin color. Tactile epithelial (Merkel) cells are involved in touch sensation. Keratinocytes produce keratin for skin structure.

Answer:

D. Dendritic (Langerhans) cells