Inhibitory postsynaptic potentials (IPSPs) generally result when _________ channels are opened.
A) postsynaptic calcium
B) postsynaptic sodium
C) presynaptic potassium or chloride
D) postsynaptic potassium or chloride

Question

Quizplus · Accepted Answer

IPSPs generally result from the opening of postsynaptic potassium or chloride channels, which hyperpolarize the membrane and make it more difficult to generate an action potential. The opening of postsynaptic sodium channels would depolarize the membrane and make it easier to generate an action potential. The opening of presynaptic potassium or chloride channels would affect the release of neurotransmitters from the presynaptic neuron, but not directly affect the postsynaptic membrane potential. Postsynaptic calcium channels are important for neurotransmitter release from the presynaptic neuron, but not directly involved in generating IPSPs.

Inhibitory Postsynaptic Potentials (IPSPs) Generally Result When _________ Channels Are