The rising phase of the action potential of a cardiac cardiomyocyte is caused by a __________ current.
A)potassium
B)sodium
C)chloride
D)calcium

Name: The rising phase of the action potential of a cardiac cardiomyocyte is caused by a __________ current. A)potassium B)sodium C)chloride D)calcium
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Quizplus · Accepted Answer

The rising phase of the action potential of a cardiac cardiomyocyte is primarily caused by a rapid influx of sodium ions (Na+), which leads to depolarization of the cell membrane.

The Rising Phase of the Action Potential of a Cardiac