As with action potentials in other types of cells, the repolarization of cardiac muscle cells involves the
A) entrance of calcium through voltage-gated channels.
B) exit of potassium through voltage-gated channels.
C) entrance of sodium through voltage-gated channels.
D) binding of ACh to ACh receptor.
E) simultaneous closure of sodium channels and opening of calcium channels.

Question

Quizplus · Accepted Answer

Repolarization of cardiac muscle cells involves the exit of potassium ions through voltage-gated potassium channels, which helps restore the negative membrane potential after depolarization.

As with Action Potentials in Other Types of Cells, the Repolarization