Question 1

Which structure is responsible for anchoring the atrioventricular (AV) valve flaps to the papillary muscles in the heart?

Accepted Answer

Chordae tendineae

Question 2

During ventricular contraction, what is the primary function of the chordae tendineae?

Accepted Answer

Prevent AV valve prolapse into the atria

Question 3

Which sequence correctly describes the flow of blood through the heart, starting from the superior vena cava?

Accepted Answer

Superior vena cava → right atrium → tricuspid valve → right ventricle → pulmonary valve → pulmonary artery → lungs → pulmonary veins → left atrium → bicuspid (mitral) valve → left ventricle → aortic valve → aorta

Question 4

A patient has a ruptured chordae tendineae in the left ventricle. What is the most likely consequence?

Accepted Answer

Mitral valve regurgitation leading to backflow into the left atrium

Question 5

Which of the following best describes the role of papillary muscles in heart valve function?

Accepted Answer

They contract to tighten the chordae tendineae, preventing AV valve inversion during ventricular systole

Question 6

If the tricuspid valve fails to close properly, which chamber will experience abnormal blood flow during ventricular contraction?

Accepted Answer

Right atrium

Question 7

Which equation best represents the cardiac output ($$CO) of $$the heart?

Accepted Answer

$$CO = HR 	imes SV$$

Question 8

A blockage in the pulmonary artery would directly affect blood flow to which organ?

Accepted Answer

Lungs

Question 9

Which valve prevents backflow of blood from the aorta into the left ventricle?

Accepted Answer

Aortic valve

Question 10

During the cardiac cycle, which event occurs immediately after the left ventricle contracts?

Accepted Answer

Blood is ejected through the aortic valve into the aorta

Question 11

Which of the following is NOT a component of the heart's conduction system?

Accepted Answer

Chordae tendineae

Question 12

A patient presents with a heart murmur due to mitral valve prolapse. Which structure is most likely compromised?

Accepted Answer

Chordae tendineae

Question 13

Which chamber receives oxygenated blood from the lungs?

Accepted Answer

Left atrium

Question 14

If the chordae tendineae are too short, what is the most likely effect on the AV valves during ventricular contraction?

Accepted Answer

The AV valves may not close completely, leading to regurgitation

Question 15

Which vessel carries deoxygenated blood from the right ventricle to the lungs?

Accepted Answer

Pulmonary artery

Cardiac Anatomy: AV Valve Structure and Blood Flow Through the Heart

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