All of the following must occur before a second action potential can begin,EXCEPT A) the Na⁺ and K⁺ ions that moved in/out of the cell must move back to their original compartments. B) the Na⁺ inactivation gate must open and the Na⁺ activation gate must close. C) the absolute refractory period must occur. D) the Na⁺ and K⁺ ions that moved in/out of the cell must move back to their original compartments; the Na⁺ inactivation gate must open; and the Na⁺ activation gate must close. E) None of the answers are correct.

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The Answer of All of the following must occur before a second action potential can begin,EXCEPT A) the Na⁺ and K⁺ ions that moved in/out of the cell must move back to their original compartments. B) the Na⁺ inactivation gate must open and the Na⁺ activation gate must close. C) the absolute refractory period must occur. D) the Na⁺ and K⁺ ions that moved in/out of the cell must move back to their original compartments; the Na⁺ inactivation gate must open; and the Na⁺ activation gate must close. E) None of the answers are correct.

All of the Following Must Occur Before a Second Action