1. Which component of the epidermis initiates immune responses and provides a
defense against environmental antigens?
a. Langerhans cells
b. Merkel cells
c. Keratinocytes
d. Melanocytes
2. Which cells of the dermis release histamine and play a role in the hypersensitivity
reactions of the skin?
a. Histiocytes
b. Fibroblasts
c. Mast cells
d. Macrophages
3. Which cells of the dermis secrete connective tissue matrix?
a. Macrophages
b. Mast cells
c. Fibroblasts
d. Histiocytes
4. Which gland releases secretions that are important in thermoregulation and cooling
of the body through evaporation?
a. Sebaceous
b. Apocrine
c. Eccrine