Damage to the SA node in humans is most likely to result in a ________.
A) blockage of conductance between the bundle branches and the Purkinje fibers
B) negative effect on peripheral resistance
C) disruption on the rate and timing of cardiac muscle contractions
D) direct effect on blood pressure monitors in the aorta

Question

Quizplus · Accepted Answer

The SA node, or sinoatrial node, acts as the natural pacemaker of the heart. It is responsible for initiating the electrical impulses that set the rate and rhythm of heartbeat. Damage to the SA node can disrupt the normal rate and timing of cardiac muscle contractions, leading to arrhythmias or other heart rhythm disorders.

Damage to the SA Node in Humans Is Most Likely