The<unk>  <unk> R) is an ionotropic receptor for glutamate <unk>  (N-methyl d-aspartate) is a name of its selective specific agonist). Activation of<unk> s results in the opening of an ion channel which is nonselective to cations.  This allows flow of Na+ and small amounts of Ca2+ ions into the cell and K+ out of the cell.
Calcium flux through<unk> Rs is thought to play a critical role in synaptic plasticity, a cellular mechanism for learning and memory. The<unk>  is distinct in that it is both ligand-gated and voltage-dependent.
NMDA receptor
AMPA receptor
5-HT receptor
Muscarinic acetylcholine receptor
Opioid receptor
Nicotinic acetylcholine receptor
P2X receptor
Baroreceptor