During the rising phase of an action potential,voltage-gated A)Na⁺ channels open B)K⁺ channels open C)Na⁺ channels close D)K⁺ channels close E)Both Na⁺ channels open and K⁺ channels close are correct

Question

Quizplus · Accepted Answer

During the rising phase of an action potential, voltage-gated Na+ channels open, allowing an influx of Na+ ions into the cell, which depolarizes the membrane. The opening of K+ channels (choice B) occurs later during the repolarization phase, as K+ ions move out of the cell. The closing of Na+ channels (choice C) also occurs later during repolarization, as the membrane potential returns to its resting state. Therefore, only choice A is correct for the rising phase.

During the Rising Phase of an Action Potential,voltage-Gated