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

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.