Facts about Neurotransmitter Receptor Types
- 05
Receptor density and subtype expression in the brain can change in response to chronic drug exposure, a process underlying tolerance and dependence.
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A single neurotransmitter can activate multiple receptor types, producing different or even opposite effects depending on which receptor subtype it binds.
- 03
Ionotropic receptors, such as GABA-A and NMDA receptors, contain a ligand-binding site and an ion channel within the same protein complex.
- 02
Metabotropic receptors are G protein-coupled receptors that produce slower, longer-lasting effects compared to the rapid responses of ionotropic receptors.
- 01
The two major classes of neurotransmitter receptor types are ionotropic receptors, which directly open ion channels, and metabotropic receptors, which act through second messengers.