Question 1

Which three veins are responsible for conducting deoxygenated blood to the right atrium of the heart?

Accepted Answer

Superior vena cava, inferior vena cava, and coronary sinus

Question 2

A patient has a blockage in the coronary sinus. Which of the following is the most likely consequence?

Accepted Answer

Impaired drainage of deoxygenated blood from the myocardium into the right atrium

Question 3

What is the primary function of the papillary muscles in the heart?

Accepted Answer

To prevent the atrioventricular valves from inverting during ventricular contraction

Question 4

During ventricular systole, which structure is directly responsible for preventing the backflow of blood into the atria?

Accepted Answer

The papillary muscles, by tightening the chordae tendineae

Question 5

If the inferior vena cava is obstructed, which of the following would most likely occur?

Accepted Answer

Reduced venous return from the lower body to the right atrium

Question 6

Which of the following best describes the path of deoxygenated blood from the body to the lungs?

Accepted Answer

Body → superior/inferior vena cava → right atrium → right ventricle → pulmonary artery → lungs

Question 7

A patient with a damaged papillary muscle is at risk for which of the following complications?

Accepted Answer

Regurgitation of blood through the atrioventricular valves during ventricular contraction

Question 8

Which equation best represents the relationship between cardiac output ($$CO$$), heart rate ($$HR$$), and stroke volume ($$SV$$)?

Accepted Answer

$$CO = HR 	imes SV$$

Question 9

If the coronary sinus is unable to drain properly, which area of the heart is most directly affected?

Accepted Answer

The myocardium, due to accumulation of deoxygenated blood

Question 10

Which of the following is NOT a vein that returns blood to the right atrium?

Accepted Answer

Pulmonary vein

Cardiac Anatomy: Veins of the Right Atrium and Papillary Muscles

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