If presynaptic neuron X is stimulated, the postsynaptic cell membrane becomes slightly hyperpolarized. What kind of a synapse is involved between presynaptic neuron X and the postsynaptic neuron?
A)excitatory synapse
B)inhibitory synapse
C) either an excitatory or an inhibitory synapse
D) collateral axoaxonic

Question

Quizplus · Accepted Answer

The fact that stimulation of presynaptic neuron X results in a slight hyperpolarization of the postsynaptic cell membrane suggests that an inhibitory synapse is involved. Inhibitory synapses work to decrease the likelihood of the postsynaptic neuron firing an action potential, and hyperpolarization (increasing the polarization potential) is one mechanism by which this can occur.

If Presynaptic Neuron X Is Stimulated, the Postsynaptic Cell Membrane