The ion primarily responsible for depolarization in pacemaker cells is ______________,whereas the ion primarily responsible for this in other cardiac cells is _____________.
A) sodium; calcium
B) calcium; sodium
C) potassium; sodium
D) calcium; potassium

Question

Quizplus · Accepted Answer

Pacemaker cells rely on the influx of calcium ions to depolarize, whereas other cardiac cells rely on the influx of sodium ions. Therefore, the ion primarily responsible for depolarization in pacemaker cells is calcium, whereas the ion primarily responsible for this in other cardiac cells is sodium.

The Ion Primarily Responsible for Depolarization in Pacemaker Cells Is