An action potential

Q. An action potential:

  1. is essential for nerve impulse propagation
  2. involves the influx of negative ions to depolarize the membrane
  3. involves the outflux of negative ions to depolarize the membrane
  4. involves the outflux of positive ions to depolarize the membrane
  5. is initiated by potassium ion movements

Answer: is essential for nerve impulse propagation

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