Multiple choice

In contrast, during repolarization:

  1. K+ moves into the axon via facilitated diffusion

  2. K+ moves out of the axon via facilitated diffusion

  3. Na+ moves into the axon via facilitated diffusion

  4. Na+ moves out of the axon via facilitated diffusion
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

During repolarization, voltage-gated potassium channels open, allowing K+ ions to flow out of the axon down their concentration gradient via facilitated diffusion.

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