A Hypothetical Postsynaptic Neuron Has Three Presynaptic Inputs-X, Y, and Z.When

Multiple Choice

A hypothetical postsynaptic neuron has three presynaptic inputs-X, Y, and Z.When X and Y are stimulated simultaneously, the postsynaptic neuron undergoes an action potential, yet when X and Z are stimulated simultaneously, there is no change in the postsynaptic neuron's potential.What can you logically conclude?

A) Y and Z are both excitatory.
B) Y and Z are both inhibitory.
C) Y is excitatory and Z is inhibitory.
D) Y is inhibitory and Z is excitatory.
E) Not enough information to answer.