A postsynaptic neuron has three presynaptic inputs - from neurons X, Y, and Z. When X and Y are stimulated simultaneously and repeatedly, the postsynaptic neuron reaches threshold and undergoes an action potential

When X and Z are stimulated simultaneously, however, there is no change in the membrane potential of the postsynaptic neuron. The simultaneous stimulation of X and Y is an example of
A. temporal summation.
B. presynaptic inhibition.
C. spatial summation.
D. neuronal divergence.
E. presynaptic facilitation.


C

Anatomy & Physiology

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