Question 1

Which of the following best describes the function of the pulmonary circuit in the cardiovascular system?

Accepted Answer

It pumps oxygen-poor blood to the lungs to get rid of $$CO_2$$ and pick up $$O_2.$$

Question 2

A patient presents with a pericardial friction rub heard through a stethoscope. What is the most likely underlying condition?

Accepted Answer

Pericarditis

Question 3

Which anatomical landmark is used to palpate the apical impulse of the heart?

Accepted Answer

Between the fifth and sixth ribs, just below the left nipple

Question 4

Which layer of the heart wall is responsible for the contractile function of the heart?

Accepted Answer

Myocardium

Question 5

A blockage in which vessel would most directly reduce oxygenated blood flow to the myocardium?

Accepted Answer

Coronary artery

Question 6

Which of the following statements about the atrioventricular (AV) valves is correct?

Accepted Answer

They are anchored by chordae tendineae to papillary muscles.

Question 7

During ventricular relaxation, which heart valves are open to allow blood flow into the ventricles?

Accepted Answer

Atrioventricular valves

Question 8

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

Accepted Answer

Left atrium

Question 9

A patient with cardiac tamponade will most likely experience which of the following physiological effects?

Accepted Answer

Compression of the heart, reducing its pumping ability

Question 10

Which of the following best explains why the left ventricle has a thicker wall than the right ventricle?

Accepted Answer

It pumps blood with greater pressure to the systemic circuit.

Question 11

Which of the following is a function of the cardiac skeleton?

Accepted Answer

It anchors cardiac muscle fibers and supports great vessels and valves.

Question 12

Which of the following best describes the role of the semilunar valves?

Accepted Answer

They prevent backflow from the major arteries into the ventricles.

Question 13

A patient with a defective mitral valve is most likely to experience which of the following?

Accepted Answer

Backflow of blood from the left ventricle into the left atrium

Question 14

Which of the following is true regarding the coronary sinus?

Accepted Answer

It collects deoxygenated blood from the myocardium and empties into the right atrium.

Question 15

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

Accepted Answer

The inertia of incoming blood and compression of venous openings during contraction prevent backflow.

Question 16

Which of the following is a direct result of a prolonged coronary artery blockage?

Accepted Answer

Myocardial infarction

Question 17

Which of the following best describes the difference between cardiac and skeletal muscle contraction?

Accepted Answer

Cardiac muscle cells can contract as a unit due to gap junctions, while skeletal muscle fibers contract independently.

Question 18

Which of the following is a consequence of aortic valve stenosis?

Accepted Answer

The left ventricle must generate higher pressure to eject blood into the aorta.

Question 19

Which of the following best describes the flow of blood through the heart starting from the right atrium?

Accepted Answer

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

Question 20

Which of the following is a unique feature of cardiac muscle cells compared to skeletal muscle cells?

Accepted Answer

They are short, branched, and connected by intercalated discs.

Chapter 18 Part A: The Cardiovascular System – Heart Anatomy and Physiology

Study Guide - Practice Questions