Automatic pacemaker cells spontaneously depolarize,because
A) leak channels (If) allow calcium and sodium ions into the cell.
B) they lack efficient sodium/potassium pumps.
C) voltage-sensitive sodium channels open spontaneously.
D) chloride leaks into the cell during rest.

Question

Quizplus · Accepted Answer

Automatic pacemaker cells have an action potential that is characterized by a sloping phase 4.Cell membrane channels automatically open as leak channels allow calcium and sodium to enter the cell.Automatic pacemaker cells allow an influx of calcium.The channels open and close quickly.Many channels open through autonomic neurotransmitters.Chloride does not leak into the cell during rest.

Automatic Pacemaker Cells Spontaneously Depolarize,because