During the Plateau Phase of the Action Potentials of Myocardial

question 124

Multiple Choice

During the plateau phase of the action potentials of myocardial contractile cells, which ion(s) is/are crossing the membrane?

• A) Ca²⁺ only
• B) K⁺ only
• C) Na⁺ only
• D) both Ca²⁺ and K⁺
• E) both Na⁺ and K⁺

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