Question 1

Which chamber of the heart receives oxygen-poor blood from the systemic circuit?

Accepted Answer

Right atrium

Question 2

What is the primary function of the pulmonary circuit?

Accepted Answer

To carry oxygen-poor blood to the lungs for gas exchange

Question 3

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

Accepted Answer

Pulmonary vein

Question 4

Why does the left ventricle have thicker walls than the right ventricle?

Accepted Answer

It pumps blood into the systemic circuit, which has higher resistance and pressure

Question 5

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

Accepted Answer

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

Question 6

If the right ventricle fails to pump efficiently, which of the following is most likely to occur?

Accepted Answer

Pulmonary congestion due to backup of blood in the pulmonary circuit

Question 7

Which of the following statements about the systemic and pulmonary circuits is correct?

Accepted Answer

Both circuits carry equal volumes of blood, but the left ventricle works harder due to higher resistance

Question 8

A blockage in the coronary arterial circulation can lead to which condition?

Accepted Answer

Myocardial infarction, which is cell death due to prolonged lack of oxygen

Question 9

Which of the following is TRUE regarding the pulmonary arteries?

Accepted Answer

They carry oxygen-poor blood from the right ventricle to the lungs

Question 10

Which chamber of the heart pumps blood into the aorta?

Accepted Answer

Left ventricle

Question 11

A patient has a defect in the left ventricle causing it to pump less forcefully. What is the most likely consequence?

Accepted Answer

Decreased blood flow to the body tissues

Question 12

Which of the following best explains why the right ventricle is crescent-shaped and has thinner walls than the left ventricle?

Accepted Answer

It pumps blood a shorter distance into a low-pressure, low-resistance circuit

Question 13

Which of the following is a correct statement about the flow of blood through the heart?

Accepted Answer

Blood flows from the atrium to the ventricle, then is pumped to either the lungs or the rest of the body

Question 14

Which of the following vessels returns oxygen-poor blood to the right side of the heart?

Accepted Answer

Systemic veins

Question 15

Which of the following is the correct sequence of blood flow through the heart’s chambers and major vessels?

Accepted Answer

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

Question 16

Which of the following statements about the heart’s double pump function is correct?

Accepted Answer

The right side of the heart supplies the pulmonary circuit, and the left side supplies the systemic circuit

Question 17

Which of the following is TRUE regarding the systemic arteries?

Accepted Answer

They carry oxygenated blood to body tissues

Question 18

Which of the following best describes the role of the left atrium?

Accepted Answer

It receives oxygenated blood from the lungs

Question 19

Which of the following is a consequence of a prolonged coronary blockage?

Accepted Answer

Replacement of dead myocardial cells with noncontractile scar tissue

Question 20

Which of the following statements about the volume of blood moved by the pulmonary and systemic circuits is correct?

Accepted Answer

Both circuits move equal volumes of blood, but the ventricles have unequal workloads

The Cardiovascular System: The Heart – Structure and Circuits

Study Guide - Practice Questions