An excitatory postsynaptic potential hyperpolarizes a local potential.

Question

Quizplus · Accepted Answer

An excitatory postsynaptic potential (EPSP) is a depolarization of the local potential caused by the influx of positively charged ions such as sodium (Na+) or calcium (Ca2+) into the cell. It does not hyperpolarize the local potential. In contrast, an inhibitory postsynaptic potential (IPSP) hyperpolarizes the local potential, making it more negative and less likely for the neuron to fire an action potential.

An Excitatory Postsynaptic Potential Hyperpolarizes a Local Potential