NR 283 Exam 2 - Chamberlai n | 2023 QUESTIONS AND VERIFIED ANSWERS

NR 283
Exam 2 -
Chamberlai
n | 2023
QUESTIONS
AND

,VERIFIED
ANSWERS

,What is the primary function of the SA node in the heart?



A) To slow down the heart rate



B) To act as a gatekeeper for electrical signals



C) To initiate electrical impulses that set the rhythm and rate of the heart; "pacemaker" of the heart



D) To contract and pump blood to the ventricles



C) To initiate electrical impulses that set the rhythm and rate of the heart; "pacemaker" of the heart




What is the role of the AV node in the cardiac conduction system?



A) To act as the primary pacemaker of the heart



B) To contract and pump blood into the ventricles



C) To slow the electrical signal before it enters the ventricles



D) To prevent the backflow of blood into the atria



C) To slow the electrical signal before it enters the ventricles




Which valves make up the S2 sound?



1. ________________________

, 2. ________________________



1. Aortic

2. Pulmonic




Which valves make up the S1 sound?



1. ________________________



2. ________________________



1. Bicuspid/mitral

2. Tricuspid




What is the term used to describe the filling of the ventricles with blood?



A) Afterload



B) Preload



C) Stroke volume



D) Cardiac output



B) Preload