Action Potential in the Contractile Cardiac Muscle Fibers Has a Unique

question 58

Multiple Choice

Action potential in the contractile cardiac muscle fibers has a unique shape with a long plateau. What ion channels are responsible for the plateau phase of cardiac action potential?

• A) L type voltage gated Ca²⁺ channels
• B) T type voltage gated Ca²⁺ channels
• C) fast voltage gated K⁺ channels
• D) F type Na⁺ channels

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