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quizloet Depolarization of a cardiac muscle cell occurs as the result of a decrease in the permeability of the cell membrane to sodium. the opening of voltage-gated sodium channels. the closure of voltage-gated calcium channels. the opening of voltage-gated potassium channels. the closure of the voltage-gated sodium channels.

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Answer:

The opening of voltage-gated sodium channels

Explanation:

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Depolarization occurs when sodium ions move across the cardiac cell membranes generating a change in charges and therefore the depolarization.

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