The Depolarization Phase of an Action Potential Requires

question 40

Multiple Choice

The depolarization phase of an action potential requires

• A) opening of K⁺ channels in the membrane.
• B) opening of Na⁺ channels in the membrane.
• C) a K⁺ concentration gradient across the membrane.
• D) a Na⁺ concentration gradient across the membrane.
• E) both B and D

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