Question

bio - 201 topic 7: autonomic nervous system & special senses
practice it
what are neurotransmitters?
enzymes that break down nutrients in the digestive system.
chemical messengers that are released by neurons and bind to specific receptors on target cells.
hormones that are released by glands.
electric signals that are sent between neurons.
proteins that make up the structural framework of cells.

Explanation:

Neurotransmitters are chemicals released by neurons to transmit signals across a synapse to a target cell. They bind to specific receptors on the target cell to exert their effects. They are not enzymes, hormones, electric signals, or structural - proteins.

Answer:

Chemical messengers that are released by neurons and bind to specific receptors on target cells.