The endocrine system is comprised of a number of glands that release chemical messengers known as ____ into the ____.
A)hormones;blood
B)neurotransmitters;blood
C)hormones;cerebrospinal fluid
D)neurotransmitters;cerebrospinal fluid

Question

Quizplus · Accepted Answer

The endocrine system releases hormones into the blood, which then circulate throughout the body and affect various target organs and tissues. Neurotransmitters, on the other hand, are released by neurons and act locally at synapses, rather than being carried throughout the bloodstream. Cerebrospinal fluid is primarily involved in nourishing and protecting the central nervous system, and is not directly involved in the regulation of hormonal activity.

The Endocrine System Is Comprised of a Number of Glands