Neurotransmitters

Definition

Neurotransmitters are chemical messengers that transmit signals across a synapse from one neuron (nerve cell) to another 'target' neuron, muscle cell, or gland cell.

Related terms

Acetylcholine:

This is a type of neurotransmitter that plays a key role in muscle contraction and heart rate regulation. It's also involved in memory formation and learning.

Dopamine:

Another type of neurotransmitter that's associated with pleasure and reward. It's often linked with addiction because drugs can increase its levels in the brain.

Serotonin:

This is a neurotransmitter that helps regulate mood, appetite, sleep, and some cognitive functions including memory and learning.