Question

Which two cell types are both found in the middle layer of the epidermis?

A. Dead keratinocytes and basal cells

B.Keratinocytes and Langerhans cells

C.Melanocytes and Merkel cells

D.Squamous cells and Merkel cells

Answer 1

B. Keratinocytes and Langerhans cells are both found in the stratum spinosum, the middle layer of the epidermis.

Step-by-step explanation:

The two cell types that are found in the middle layer of the epidermis, specifically in the stratum spinosum, are keratinocytes and Langerhans cells. The stratum spinosum is located just above the stratum basale, which is the deepest layer of the epidermis. The keratinocytes in the stratum spinosum have begun to accumulate keratin and become tougher and flatter, also forming spiny connections with each other. The Langerhans cells found in this layer are part of the immune system and play a role in detecting and fighting pathogens.