Question 1

Which heart valve is supported by chordae tendineae and papillary muscles, and what is the main function of this support?

Accepted Answer

Tricuspid valve; to prevent prolapse of the valve leaflets during ventricular contraction

Question 2

A patient is diagnosed with mitral valve regurgitation. What does this mean?

Accepted Answer

The mitral valve allows blood to flow backward into the left atrium.

Question 3

Which of the following best describes the conduction pathway of the heart?

Accepted Answer

Sinoatrial node → Atrioventricular node → Bundle of His → Bundle branches → Purkinje fibers

Question 4

What is the primary function of the fibrous pericardium?

Accepted Answer

To protect the heart and restrict overfilling or overstretching

Question 5

A patient presents with aortic valve stenosis. What is the physiological consequence?

Accepted Answer

The aortic valve does not open completely, increasing resistance to blood flow from the left ventricle

Question 6

Which structure is located at the apex of the heart, and where can it be palpated?

Accepted Answer

Left ventricle; fifth intercostal space

Question 7

Which vessels carry oxygenated blood from the lungs to the heart?

Accepted Answer

Pulmonary veins

Question 8

During ventricular systole, which valves are open and which are closed?

Accepted Answer

Semilunar valves are open; atrioventricular valves are closed

Question 9

Which of the following best explains why the tricuspid and mitral valves require chordae tendineae, but the aortic and pulmonary valves do not?

Accepted Answer

The tricuspid and mitral valves are exposed to higher pressures during ventricular contraction

Question 10

A patient has a blockage in the right bundle branch. Which part of the heart's conduction system will be directly affected?

Accepted Answer

Conduction to the right ventricle

Question 11

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

Accepted Answer

$$CO = HR 	imes SV$$

Question 12

If the sinoatrial (SA) node fails, which structure will most likely take over as the pacemaker of the heart?

Accepted Answer

Atrioventricular (AV) node

Question 13

Which of the following best describes the location of the sternal angle and its clinical significance?

Accepted Answer

It is at the level of the second rib and is used as a landmark for counting ribs

Question 14

Which chamber of the heart receives deoxygenated blood from the body?

Accepted Answer

Right atrium

Question 15

A patient with a damaged papillary muscle is most likely to experience which of the following complications?

Accepted Answer

Regurgitation of blood through the atrioventricular valves

Question 16

Which of the following best describes the flow of blood through the heart and lungs?

Accepted Answer

Right atrium → right ventricle → pulmonary trunk → lungs → left atrium → left ventricle → aorta

Question 17

Which of the following is true regarding the semilunar valves?

Accepted Answer

They prevent backflow of blood into the ventricles

Question 18

Which of the following best explains why the heart can continue to beat outside the body for a short period?

Accepted Answer

Cardiac muscle cells can generate their own action potentials

Question 19

A patient with pulmonary valve regurgitation will have blood flowing backward into which chamber?

Accepted Answer

Right ventricle

Question 20

Which of the following is the correct order of structures that an electrical impulse travels through in the heart's conduction system?

Accepted Answer

Sinoatrial node → Atrioventricular node → Bundle of His → Bundle branches → Purkinje fibers

The Heart: Structure, Valves, and Conduction System

Study Guide - Practice Questions