Endocrine Gland(s)

Multiple Choice

Endocrine gland(s)

A) secrete substances that do not alter the metabolism of their target cells, but have extracellular effects.
B) secrete their products by way of ducts.
C) have an unusually low density of blood capillaries.
D) release their secretions directly into the blood.
E) secretions may be released onto the body surface.