NR 509 WEEK 4 QUIZLET CURRENTLY TESTING
WITH DETAILED QUESTIONS AND CORRECT
ANSWERS GRADED A+| CHAMBERLAIN
UNIVERSITY
1. The nurse is reviewing the anatomy and physiologic
functioning of the heart. Which statement best describes
what is meant by "atrial kick"?
A. The pressure exerted against the atria as the ventricles
contract during systole.
B. Contraction of the atria at the beginning of diastole that can be
felt as a palpitation.
C. The contraction of the atria during systole attempting to push
against closed valves.
D. The contraction of the atria toward the end of diastole pushing
the remaining blood into the ventricles.
• Correct Answer: D
• Rationale: Atrial kick occurs during late ventricular diastole
when the atria contract to pump the final 20% to 30% of
blood volume into the ventricles.
,2. Which sequence correctly describes the flow of blood
through the cardiac chambers and pulmonary circulation?
A. Vena cava → Right atrium → Right ventricle → Lungs →
Pulmonary artery → Left atrium → Left ventricle
B. Right atrium → Right ventricle → Pulmonary artery → Lungs →
Pulmonary vein → Left atrium → Left ventricle
C. Aorta → Right atrium → Right ventricle → Lungs → Pulmonary
vein → Left atrium → Left ventricle → Vena cava
D. Right atrium → Right ventricle → Pulmonary vein → Lungs →
Pulmonary artery → Left atrium → Left ventricle
• Correct Answer: B
• Rationale: Deoxygenated blood moves from the right atrium
to the right ventricle, out the pulmonary artery to the lungs
for oxygenation, back through the pulmonary veins to the left
atrium, and into the left ventricle.
3. The sac that surrounds and protects the heart muscle is
known as the:
A. Endocardium
B. Myocardium
C. Pericardium
D. Pleural space
, • Correct Answer: C
• Rationale: The pericardium is a tough, fibrous double-walled
sac that surrounds and protects the heart.
4. When auscultating heart sounds, the nurse knows that the
valve closures heard best at the base of the heart are the:
A. Mitral and tricuspid valves
B. Tricuspid and aortic valves
C. Aortic and pulmonic valves
D. Mitral and pulmonic valves
• Correct Answer: C
• Rationale: The aortic and pulmonic semilunar valves close
at the start of diastole (𝑆2 ), which is best auscultated at the
base of the heart.
5. Which statement accurately describes valve closure timing
in a normal cardiac cycle?
A. The aortic valve closes slightly before the tricuspid valve.
, B. The pulmonic valve closes slightly before the aortic valve.
C. The tricuspid valve closes slightly later than the mitral valve.
D. Both the tricuspid and pulmonic valves close simultaneously.
• Correct Answer: C
• Rationale: Right-sided cardiac events occur slightly later
than left-sided events due to route distance; thus, the mitral
valve closes just before the tricuspid valve.
6. The primary pacemaker of the heart responsible for
initiating the electrical impulse is the:
A. Atrioventricular (AV) node
B. Sinoatrial (SA) node
C. Bundle of His
D. Purkinje fibers
• Correct Answer: B
• Rationale: The SA node has the fastest intrinsic automaticity
and acts as the normal cardiac pacemaker.
WITH DETAILED QUESTIONS AND CORRECT
ANSWERS GRADED A+| CHAMBERLAIN
UNIVERSITY
1. The nurse is reviewing the anatomy and physiologic
functioning of the heart. Which statement best describes
what is meant by "atrial kick"?
A. The pressure exerted against the atria as the ventricles
contract during systole.
B. Contraction of the atria at the beginning of diastole that can be
felt as a palpitation.
C. The contraction of the atria during systole attempting to push
against closed valves.
D. The contraction of the atria toward the end of diastole pushing
the remaining blood into the ventricles.
• Correct Answer: D
• Rationale: Atrial kick occurs during late ventricular diastole
when the atria contract to pump the final 20% to 30% of
blood volume into the ventricles.
,2. Which sequence correctly describes the flow of blood
through the cardiac chambers and pulmonary circulation?
A. Vena cava → Right atrium → Right ventricle → Lungs →
Pulmonary artery → Left atrium → Left ventricle
B. Right atrium → Right ventricle → Pulmonary artery → Lungs →
Pulmonary vein → Left atrium → Left ventricle
C. Aorta → Right atrium → Right ventricle → Lungs → Pulmonary
vein → Left atrium → Left ventricle → Vena cava
D. Right atrium → Right ventricle → Pulmonary vein → Lungs →
Pulmonary artery → Left atrium → Left ventricle
• Correct Answer: B
• Rationale: Deoxygenated blood moves from the right atrium
to the right ventricle, out the pulmonary artery to the lungs
for oxygenation, back through the pulmonary veins to the left
atrium, and into the left ventricle.
3. The sac that surrounds and protects the heart muscle is
known as the:
A. Endocardium
B. Myocardium
C. Pericardium
D. Pleural space
, • Correct Answer: C
• Rationale: The pericardium is a tough, fibrous double-walled
sac that surrounds and protects the heart.
4. When auscultating heart sounds, the nurse knows that the
valve closures heard best at the base of the heart are the:
A. Mitral and tricuspid valves
B. Tricuspid and aortic valves
C. Aortic and pulmonic valves
D. Mitral and pulmonic valves
• Correct Answer: C
• Rationale: The aortic and pulmonic semilunar valves close
at the start of diastole (𝑆2 ), which is best auscultated at the
base of the heart.
5. Which statement accurately describes valve closure timing
in a normal cardiac cycle?
A. The aortic valve closes slightly before the tricuspid valve.
, B. The pulmonic valve closes slightly before the aortic valve.
C. The tricuspid valve closes slightly later than the mitral valve.
D. Both the tricuspid and pulmonic valves close simultaneously.
• Correct Answer: C
• Rationale: Right-sided cardiac events occur slightly later
than left-sided events due to route distance; thus, the mitral
valve closes just before the tricuspid valve.
6. The primary pacemaker of the heart responsible for
initiating the electrical impulse is the:
A. Atrioventricular (AV) node
B. Sinoatrial (SA) node
C. Bundle of His
D. Purkinje fibers
• Correct Answer: B
• Rationale: The SA node has the fastest intrinsic automaticity
and acts as the normal cardiac pacemaker.
