If a neuron's membrane potential is held close to the threshold potential by excitatory postsynap-tic potentials (EPSPs), the neuron is said to be:
a. hyperpolarized.
b. facilitated.
c. integrated.
d. inhibited.
ANS: B
Facilitation refers to the effect of EPSP on the plasma membrane potential. The postsynaptic neuron's plasma membrane may be inhibited, which is called hyperpolarized. When the neuron's membrane potential is held close to the threshold potential, the neuron is facilitated, not inte-grated or inhibited.
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