What is the function of P cells found in the sinoatrial node and Purkinje fibers?
A) They are receptors for pain stimuli,such as the pain that occurs during infarction.
B) They prolong the refractory period before the next contraction.
C) They are assumed to be the site of impulse formation.
D) They initiate repolarization of the myocardium.

Question

Quizplus · Accepted Answer

P cells found in the sinoatrial node and Purkinje fibers are assumed to be the site of impulse formation, meaning they initiate the electrical impulses that stimulate cardiac muscle contraction. They are responsible for setting the pacemaker of the heart.

What Is the Function of P Cells Found in the Sinoatrial