The depolarization of the action potential in the pacemaker cells is driven by the rapid influx of _________ions through _________channels.
A) potassium : T -type calcium
B) potassium : funny
C) sodium : T -type calcium
D) sodium : funny
E) calcium : L -type calcium

Question

Quizplus · Accepted Answer

The depolarization of the action potential in pacemaker cells, such as those found in the sinoatrial node of the heart, is primarily driven by the rapid influx of calcium ions through L-type calcium channels. This influx of calcium ions is crucial for the generation of action potentials in these cells, leading to the initiation of cardiac muscle contraction.

The Depolarization of the Action Potential in the Pacemaker Cells