An excitatory postsynaptic potential (EPSP)
A) depolarizes a neuron, decreasing the likelihood of an action potential.
B) hyperpolarizes a neuron, decreasing the likelihood of an action potential.
C) depolarizes a neuron, increasing the likelihood of an action potential.
D) hyperpolarizes a neuron, increasing the likelihood of an action potential.

Question

Quizplus · Accepted Answer

An excitatory postsynaptic potential (EPSP) produces a depolarization of the postsynaptic membrane, which means it makes the neuron's membrane potential less negative. This leads to an increase in the likelihood of an action potential because it brings the membrane potential closer to the threshold for firing an action potential. Therefore, choice C is the best answer.

An Excitatory Postsynaptic Potential (EPSP)