Which channel is responsible for depolarization phase of action potential in the contractile cardiac muscle fibers?

Question

Quizplus · Accepted Answer

The depolarization phase of an action potential in contractile cardiac muscle fibers is due to the opening of voltage-gated Na+ channels (specifically Na⁺). This allows for an influx of Na+ ions into the cell, leading to a rapid depolarization of the membrane potential.

Which Channel Is Responsible for Depolarization Phase of Action Potential