Multiple choice

During depolarization:

  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
C Correct answer
Explanation

During depolarization, voltage-gated sodium channels open, allowing Na+ ions to rush into the axon down their concentration gradient via facilitated diffusion.

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