The Depolarization Phase of an Action Potential Requires ________

question 58

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) opening of Ca2+ channels in the membrane
• D) a K+ concentration gradient across the membrane
• E) a Ca2+ concentration gradient across the membrane

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