When Voltage-Gated Sodium and Potassium Channels Open During an Action

question 42

Multiple Choice

When voltage-gated sodium and potassium channels open during an action potential, in which direction do the ions flow?

• A)Both sodium and potassium flow from the interstitial fluid into the cytoplasm.
• B)Both sodium and potassium flow from the cytoplasm to the interstitial fluid.
• C)Sodium flows from the cytoplasm to the interstitial fluid and potassium flows in the opposite direction.
• D)Sodium flows from the interstitial fluid to the cytoplasm and potassium flows in the opposite direction.
• E)Potassium flows from the interstitial fluid to the cytoplasm and sodium flows in the opposite direction.

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