Hormones are used primarily for
A) signaling target cells in the vicinity of the secreting cells.
B) stimulating transmitter release at certain synapses.
C) integrating social behavior in a population.
D) causing a response in a part of the body some distance from the site of secretion.
E) all of these, depending on the species.

Question

Quizplus · Accepted Answer

Hormones are secreted by endocrine glands and travel through the bloodstream to various parts of the body, causing a response in distant target cells. This is the primary function of hormones. While some hormones can also act as neurotransmitters and play a role in social behavior, their primary function is to cause a physiological response in a distant part of the body.

Hormones Are Used Primarily for