Excitatory postsynaptic potentials (EPSPs) occur in response to the opening of ________ channels.
A) voltage-dependent sodium
B) ligand-gated sodium
C) voltage-dependent potassium or chloride
D) ligand-gated potassium or chloride

Question

Quizplus · Accepted Answer

EPSPs are caused by the influx of positively charged ions, commonly sodium, into the postsynaptic neuron. This is typically mediated by activation of ligand-gated ion channels, which open in response to the binding of neurotransmitters released by the presynaptic neuron. Therefore, the best choice is B, which refers to ligand-gated sodium channels.

Excitatory Postsynaptic Potentials (EPSPs) Occur in Response to the Opening