For the Repolarization Phase of an SA Nodal Cell Action

question 90

Multiple Choice

For the repolarization phase of an SA nodal cell action potential,

• A) sodium and potassium channels open.
• B) calcium channels open and sodium channels close.
• C) calcium and potassium channels close.
• D) calcium channels close and potassium channels open.
• E) sodium and chloride channels open.

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