At the Beginning of an Action Potential,sodium Moves

question 71

Multiple Choice

At the beginning of an action potential,sodium moves

• A) slowly into the cell,because electrical force is offset by diffusion.
• B) rapidly into the cell,because both electrical force and diffusion will move sodium in the same direction.
• C) slowly out of the cell,because as a positive ion,sodium remains attracted to the relatively negative intracellular environment.
• D) rapidly out of the cell,because the sodium-potassium pumps are very active.

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