Multiple Choice
The rapid depolarization phase of the action potentials of myocardial contractile cells is due to which ion(s) ?
A) Ca²⁺ only
B) K⁺ only
C) Na⁺ only
D) both Ca²⁺ and K⁺
E) both Na⁺ and K⁺
Correct Answer:
Verified
Correct Answer:
Verified
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