______________-stimulating hormone (MSH) stimulates synthesis of melanin and its disbursement to the skin cells of the epidermis.

Glucagon may be ineffective in patients with inadequate:

A) liver glycogen stores. B) renal perfusion pressures. C) oxygen tissue perfusion. D) blood glucose level.

Which statement best describes the concept of lifelong learning?

a. Studies that lead to a certificate, diploma, or degree b. Formal classes taken at colleges and adult learning centers c. Professional workshops taken to keep up to date in one's field d. All purposeful learning activities