What event must occur in the postsynaptic cell before it generates an action potential?
A)The postsynaptic cell must fuse to the presynaptic cell membrane to generate an action potential.
B)The postsynaptic cell receive passage of ions through the gap junctions between the two cells in order to generate an action potential.
C)The postsynaptic cell must release neurotransmitters to generate an action potential.
D)The postsynaptic cell membrane must reach threshold to generate an action potential.
E)The postsynaptic cell membrane must hyperpolarize to generate an action potential.

Question

Quizplus · Accepted Answer

In order for an action potential to be generated in the postsynaptic cell, its membrane potential must reach threshold, which is typically around -55 mV. This depolarization is caused by the binding of neurotransmitters to receptors on the postsynaptic membrane, causing the opening of ion channels and the influx of positive ions such as sodium (Na+) or calcium (Ca2+) into the cell. Once the membrane potential reaches threshold, an action potential is initiated and propagated down the axon of the postsynaptic neuron.

What Event Must Occur in the Postsynaptic Cell Before It