Refer to the Graphs Showing Action Potentials Occurring in Response

Multiple Choice

Refer to the graphs showing action potentials occurring in response to multiple excitatory postsynaptic potentials (EPSPs) . In graph B, the action potential is due to

A) the rapid succession of EPSPs at one synapse.
B) the action of each EPSP, which raises the membrane potential above its threshold.
C) saltatory conduction along the axon receiving the EPSP.
D) the increase in strength of the EPSP as it spreads from the synapse.
E) the spatial summation of several simultaneous EPSPs.