Depolarization of a cardiac cell is mainly caused by the rapid influx of which ion?

Depolarization of a cardiac cell is mainly

Multiple choice — select the best answer

ASodium
BPotassium
CChloride
DMagnesium

✓ Correct answer: A. Sodium The rapid upstroke of the cardiac action potential in working myocardium results from a fast inward sodium current through voltage-gated sodium channels.

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Topic: Cardiac Anatomy & Electrophysiology

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Depolarization of a cardiac cell is mainly caused by the rapid influx of which ion?

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