What kind of cells produce the stimulation for cardiac muscle contraction without nervous input?
A) fascial cells
B) myocardial cells
C) pacemaker cells
D) fiber cells

Question

Quizplus · Accepted Answer

Pacemaker cells are specialized cells found in the sinoatrial node (SA node) of the heart. They generate spontaneous electrical impulses that initiate the contraction of the heart muscles without the need for nerve input. These impulses spread through the heart's conduction system and stimulate the myocardial cells to contract.

What Kind of Cells Produce the Stimulation for Cardiac Muscle