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

Question

Quizplus · Accepted Answer

The endocrine system is responsible for releasing hormones directly into the bloodstream, where they are transported to target organs or cells throughout the body. Hormones are the chemical messengers of the endocrine system, unlike neurotransmitters, which are the chemical messengers of the nervous system and are typically released across synaptic gaps to a nearby neuron, not into the bloodstream or cerebrospinal fluid.

The Endocrine System Is Comprised of a Number of Glands