When sodium channels are fully open,the membrane of the ventricular cardiocyte _________.
A)sharply hyperpolarizes
B)sharply repolarizes
C)sharply depolarizes
D)plateaus
E)has no reponse

Question

Quizplus · Accepted Answer

When sodium channels are fully open, sodium ions rush into the cell causing a sharp and rapid influx of positive charge, resulting in depolarization of the membrane potential. This triggers an action potential, which initiates contraction of the ventricular cardiocyte.

When Sodium Channels Are Fully Open,the Membrane of the Ventricular