An IPSP will be produced when a ligand
A) closes a sodium channel.
B) opens a sodium channel.
C) opens a potassium channel.
D) closes a calcium channel.
E) opens a calcium channel.

Question

Quizplus · Accepted Answer

IPSP (Inhibitory Postsynaptic Potential) is a neurotransmitter-induced hyperpolarization of the postsynaptic membrane potential caused by the opening of ligand-gated ion channels, especially K+ channels, which results in the outflow of K+ ions and/or the inflow of Cl- ions. This causes the membrane potential to become more negative, thereby inhibiting the generation of an action potential. Therefore, an IPSP will be produced when a ligand opens a potassium channel.

An IPSP Will Be Produced When a Ligand