Question 1

Which of the following best describes the function of the pulmonary circuit?

Accepted Answer

It pumps oxygen-poor blood to the lungs to exchange CO$$_2$$ for O$$_2.$$

Question 2

A patient presents with excess fluid in the pericardial cavity, compressing the heart and reducing its ability to pump. What is the most likely diagnosis?

Accepted Answer

Cardiac tamponade

Question 3

Which layer of the heart wall is responsible for the contractile force that pumps blood?

Accepted Answer

Myocardium

Question 4

During ventricular contraction, which heart valve prevents backflow of blood into the left atrium?

Accepted Answer

Mitral (bicuspid) valve

Question 5

Which anatomical feature separates the right and left atria?

Accepted Answer

Interatrial septum

Question 6

If the left ventricle wall is three times thicker than the right, what is the physiological reason for this difference?

Accepted Answer

The left ventricle pumps blood to the entire body, requiring greater pressure.

Question 7

Which of the following is TRUE regarding the function of the atrioventricular (AV) valves?

Accepted Answer

They prevent backflow of blood into the atria during ventricular contraction.

Question 8

A patient with valvular stenosis will most likely experience which of the following symptoms?

Accepted Answer

Stiff valve flaps restrict opening, requiring the heart to exert more force to pump blood.

Question 9

Which of the following correctly traces the pathway of blood through the right side of the heart?

Accepted Answer

Inferior vena cava → right atrium → tricuspid valve → right ventricle → pulmonary semilunar valve → pulmonary arteries

Question 10

Which structure anchors the cusps of the AV valves to the papillary muscles, preventing valve prolapse?

Accepted Answer

Chordae tendineae

Question 11

What is the primary function of the coronary circulation?

Accepted Answer

To deliver functional blood supply to the heart muscle itself

Question 12

Which of the following veins returns blood from body regions above the diaphragm to the right atrium?

Accepted Answer

Superior vena cava

Question 13

Which of the following statements about the semilunar (SL) valves is correct?

Accepted Answer

They open when ventricular pressure exceeds arterial pressure.

Question 14

A patient with pericarditis is most likely to present with which clinical sign?

Accepted Answer

A creaking sound (pericardial friction rub) heard with a stethoscope

Question 15

Which chamber of the heart receives oxygenated blood from the lungs?

Accepted Answer

Left atrium

Question 16

Which of the following is a remnant of the fetal foramen ovale found in the adult heart?

Accepted Answer

Fossa ovalis

Question 17

If a patient has an incompetent valve, what is the physiological consequence?

Accepted Answer

Blood flows backward, causing the heart to repump the same blood repeatedly.

Question 18

Which of the following best explains why no valves are found between major veins and atria?

Accepted Answer

Inertia of incoming blood and compression of venous openings during heart contraction prevent backflow.

Question 19

Which of the following correctly matches the heart valve with its location?

Accepted Answer

Aortic semilunar valve: between left ventricle and aorta

Anatomy and Physiology of the Heart: Structure, Circulation, and Valves

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