Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Neurotransmitter function refers to how neurotransmitters, which are chemical messengers in our nervous system, transmit signals between nerve cells (neurons) and influence various physiological processes such as mood, cognition, and behavior.
A synapse is a tiny gap between neurons where neurotransmitters are released from one neuron and received by receptors on another neuron. This junction allows for the transmission of signals and communication between neurons.
Reuptake refers to the process in which neurotransmitters that were released into the synapse are reabsorbed by the sending neuron after they have completed their job of transmitting messages. It helps regulate the levels of neurotransmitters in the brain.
An agonist is a substance (e.g., drugs) that enhances or mimics the effects of a specific neurotransmitter. It can bind to receptor sites and activate them, leading to increased neuronal activity and influencing behavior.