Question 1

Which of the following best explains why the left ventricular wall is thicker than the right ventricular wall?

Accepted Answer

The left ventricle pumps blood to the entire body, requiring higher pressure to overcome systemic resistance.

Question 2

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

Accepted Answer

Atrioventricular valves are closed; semilunar valves are open.

Question 3

Which structure prevents the eversion of atrioventricular valves during ventricular contraction?

Accepted Answer

Chordae tendineae

Question 4

A blockage in the left coronary artery would most directly affect which part of the heart?

Accepted Answer

Left ventricle

Question 5

Which of the following best describes the flow of deoxygenated blood through the heart?

Accepted Answer

Vena cava → right atrium → right ventricle → pulmonary trunk

Question 6

Which of the following is a primary function of the pericardium?

Accepted Answer

To lubricate the heart and reduce friction during contraction

Question 7

During isovolumic ventricular contraction, what happens to the heart valves?

Accepted Answer

Atrioventricular valves are closed; semilunar valves are closed.

Question 8

Which of the following best describes the effect of endurance training on the heart?

Accepted Answer

It expands the internal dimensions of the left ventricle, increasing stroke volume.

Question 9

Which vessel carries oxygenated blood from the lungs to the heart?

Accepted Answer

Pulmonary vein

Question 10

A patient with impaired coronary circulation is at increased risk for which of the following?

Accepted Answer

Myocardial ischemia

Question 11

Which equation best represents the relationship between cardiac output, heart rate, and stroke volume?

Accepted Answer

$$CO = HR 	imes SV$$

Question 12

Which of the following is true regarding the function of semilunar valves?

Accepted Answer

They prevent backflow of blood into the ventricles during ventricular relaxation.

Question 13

Which chamber of the heart receives blood directly from the pulmonary veins?

Accepted Answer

Left atrium

Question 14

Which of the following best describes the role of the chordae tendineae?

Accepted Answer

They prevent the atrioventricular valves from inverting into the atria during ventricular contraction.

Question 15

Which of the following scenarios would most likely result in increased coronary blood flow?

Accepted Answer

During exercise

Question 16

Which of the following is a direct result of isovolumic ventricular relaxation?

Accepted Answer

Pressure in the ventricles falls, causing semilunar valves to close

Question 17

Which of the following best describes the sequence of events during the cardiac cycle?

Accepted Answer

Atrial systole → isovolumic ventricular contraction → ventricular ejection → isovolumic ventricular relaxation

Question 18

Which of the following would most likely be observed in a high-performance endurance athlete's heart?

Accepted Answer

Increased left ventricular cavity size with minimal change in wall thickness

Question 19

Which of the following is NOT a function of the pericardial fluid?

Accepted Answer

Increasing myocardial contractility directly

Question 20

Which of the following best explains why impairment of coronary circulation can lead to arrhythmias?

Accepted Answer

Reduced oxygen delivery to the myocardium disrupts normal electrical activity.

Cardiovascular Physiology: Structure and Function of the Heart

Study Guide - Practice Questions