In temporal summation,a single presynaptic neuron stimulates the creation of action potentials in a postsynaptic neuron when it
A)stops firing long enough to allow the postsynaptic neuron to recover.
B)fires at a fast enough rate that the sum of EPSPs in the postsynaptic neuron moves above threshold.
C)fires at a steady rate that allows the postsynaptic neuron to return to resting potential.
D)recruits other presynaptic neurons to begin to fire.
E)runs out of neurotransmitter.

Question

Quizplus · Accepted Answer

Temporal summation occurs when a single presynaptic neuron fires action potentials in rapid succession, causing the postsynaptic neuron to receive multiple EPSPs that summate and eventually reach threshold, leading to the creation of an action potential. Therefore, option B, where the presynaptic neuron fires at a fast enough rate that the sum of EPSPs in the postsynaptic neuron moves above threshold, is the best choice for this scenario.

In Temporal Summation,a Single Presynaptic Neuron Stimulates the Creation of Action