When a neurotransmitter binds to the receptor on a postsynaptic neuron it may result in an EPSP which
A) hyperpolarizes the membrane of the postsynaptic neuron.
B) increases the probability that the postsynaptic neuron will fire.
C) results in the exit of positively charged potassium ions or the influx of negatively charged chloride ions in the post synaptic neuron.
D) results in all of the above.

Question

Quizplus · Accepted Answer

An EPSP (Excitatory Postsynaptic Potential) depolarizes the membrane of the postsynaptic neuron, making it more likely to fire an action potential. This is achieved by the influx of positively charged ions, such as sodium (Na+), not by hyperpolarization or the specific ion movements described in options A and C.

When a Neurotransmitter Binds to the Receptor on a Postsynaptic