Which of the following is responsible for the rapid depolarization phase of an action potential within the pacemaker cells?
A)a decrease in PNa
B)an increase in PNa
C)an increase in PCa
D)an increase in PK
E)a decrease in PK

Question

Quizplus · Accepted Answer

The rapid depolarization phase of an action potential in pacemaker cells is primarily due to an increase in calcium permeability (PCa) as calcium channels open, allowing calcium ions to flow into the cell.

Which of the Following Is Responsible for the Rapid Depolarization