The term "neurotransmitter" refers to ________.
A) the DNA contained in the nucleus of every neuron
B) the chemical substance which is produced when a nerve impulse moves through the cell body of a neuron
C) a chemical released from the axon terminal into the synapse
D) any one of a number of chemical compounds that increases the activity of the endocrine system

Question

Quizplus · Accepted Answer

A neurotransmitter is a chemical substance that is released from the axon terminal of a neuron into the synapse, where it can bind to receptors on another neuron or other target cells such as muscle cells or glands. This binding can either stimulate or inhibit activity in the target cell. A and B are incorrect because DNA is not a neurotransmitter, and while nerve impulses do trigger the release of neurotransmitters, the neurotransmitter itself is not the impulse. D is incorrect because neurotransmitters are not part of the endocrine system.

The Term "Neurotransmitter" Refers to ________