Question

An inhibitory postsynaptic potential ________ the postsynaptic membrane by opening ________ channels.

1) Na⁺
2) K⁺
3) Ca₂⁺
4) Cl⁻

Answer 1

An inhibitory postsynaptic potential (IPSP) is a graded potential in the postsynaptic membrane that results in hyperpolarization and makes an action potential less likely to occur.

Step-by-step explanation:

An inhibitory postsynaptic potential (IPSP) is a graded potential in the postsynaptic membrane that results in hyperpolarization and makes an action potential less likely to occur. It is caused by the opening of Cl- channels, where Cl- ions enter the cell and hyperpolarize the membrane.