Change permeability of selected ions , thereby altering the membrane potential and conditions are right, produce an electrical current.

ion-channel-coupled receptors.

Explanation:

These channels are mainly involved with the fast transmission. These receptors are organized into the membrane and regulating or ion-flow channels according to their internal diameter and the predominant electrical charge of their constituent amino acids.

Ion channels can be activated either by membrane potential variation (VOC´S - tension-operated channels), as well as interaction with an agonist (ionotropic receptors), as well as mechanical stimulation or via intracellular agents such as calcium ions, cyclic nucleotides, inositol triphosphate, and G protein.  This group includes the nicotinic cholinergic receptor, the GABA receptor, and the glutamate receptor.

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