XYZ
For the following questions, assume a hypothetical postsynaptic neuron has three presynaptic inputs: X, Y, and Z. Also assume that presynaptic neurons Y and Z are excitatory.
-Refer to the text.If presynaptic neurons Y and Z are stimulated simultaneously, what change would be expected to occur in the postsynaptic neuron
A)a single EPSP
B)a single IPSP
C)temporal summation of EPSPs
D)spatial summation of EPSPs

Question

Quizplus · Accepted Answer

When two excitatory presynaptic neurons (Y and Z) stimulate a postsynaptic neuron simultaneously, their excitatory postsynaptic potentials (EPSPs) summate spatially, leading to a greater chance of reaching the threshold for an action potential in the postsynaptic neuron.

XYZ For the Following Questions, Assume a Hypothetical Postsynaptic Neuron Has