Multiple Choice
Which must happen in order for an action potential to begin?
A) The membrane potential must be at the Na+ equilibrium potential.
B) Na+ influx must exceed K+ efflux.
C) The membrane must be out of the relative refractory period.
D) Na+ channels must all be inactivated.
E) Multiple inhibitory postsynaptic potentials (IPSPs) must summate.
Correct Answer:

Verified
Correct Answer:
Verified
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