Glutamate receptors are a type of receptor in the central nervous system that respond to the neurotransmitter glutamate. These receptors are integral to processes such as synaptic plasticity, memory formation, and learning. There are two main types of glutamate receptors: ionotropic and metabotropic. Ionotropic receptors include NMDA, AMPA, and kainate receptors, while metabotropic receptors are G-protein coupled receptors.