The secretions of endocrine glands are released directly
A)onto the skin surface.
B)into a gland duct.
C)into the nervous tissue.
D)into the lumen of a tube.
E)into the bloodstream.

Question

Quizplus · Accepted Answer

The secretions of endocrine glands are hormones, which are released directly into the bloodstream to act on specific target cells or organs throughout the body. This is in contrast to exocrine glands, which secrete their products into a duct that leads to a surface or cavity, such as sweat glands or the digestive system.

The Secretions of Endocrine Glands Are Released Directly