Which statement is TRUE of an excitatory postsynaptic potential?
A) It decreases the probability of an action potential initiated in the postsynaptic neuron.
B) It makes the postsynaptic neuron's membrane potential more positive.
C) It helps sodium ions to exit a cell.
D) It is an indentation between two gyri on the surface of the cerebral hemispheres.

Question

Quizplus · Accepted Answer

An excitatory postsynaptic potential (EPSP) makes the postsynaptic neuron's membrane potential more positive, moving it closer to the threshold for triggering an action potential. This is typically achieved by the influx of positively charged ions such as sodium (Na+) into the neuron.

Which Statement Is TRUE of an Excitatory Postsynaptic Potential