Which Must Happen in Order for an Action Potential to Begin

question 46

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.

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