A 50-year-old female received trauma to the chest that caused severe impairment of the primary pacemaker cells of the heart.Which of the following areas received the greatest damage?
A) Atrioventricular (AV) node
B) Sinoatrial (SA) node
C) Bundle of His
D) Ventricles

Question

Quizplus · Accepted Answer

The SA node is considered the pacemaker of the heart.
The SA node,not the AV node,is considered the pacemaker of the heart.
The SA node is considered the pacemaker of the heart; the bundle of His is not involved.
The SA node is considered the pacemaker of the heart; the ventricles are not involved.

A 50-Year-Old Female Received Trauma to the Chest That Caused