Question 1

Which of the following best defines perfusion in the context of cardiovascular physiology?

Accepted Answer

The delivery of oxygenated blood to the tissues of the body, measured as flow per unit of tissue mass.

Question 2

Which of the following is NOT a primary function of the heart?

Accepted Answer

Synthesizing hormones that regulate blood glucose levels.

Question 3

What is the main role of the pericardium?

Accepted Answer

To anchor the heart within the thoracic cavity and reduce friction during heartbeats.

Question 4

Which heart chamber receives oxygen-poor blood from the systemic circuit and what is its primary function?

Accepted Answer

Right atrium; receives deoxygenated blood from the body and sends it to the right ventricle.

Question 5

Which of the following best describes the pressure and muscular wall thickness of the left ventricle compared to the right ventricle?

Accepted Answer

Higher pressure, thicker wall.

Question 6

The tricuspid valve is located between which two heart chambers, and what causes it to open?

Accepted Answer

Right atrium and right ventricle; opens when atrial pressure exceeds ventricular pressure.

Question 7

Which statement about the chordae tendineae and papillary muscles is correct?

Accepted Answer

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

Question 8

During the general path of blood flow through the heart, which sequence is correct?

Accepted Answer

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

Question 9

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

Accepted Answer

$$CO = HR 	imes SV$$

Question 10

How do cardiac muscle cells receive oxygen and nutrients, and which vessels are primarily responsible?

Accepted Answer

Via the coronary arteries, which branch off the aorta and supply the myocardium.

Question 11

Which of the following is NOT a function of the fibrous skeleton of the heart?

Accepted Answer

Facilitating the conduction of electrical impulses between the atria and ventricles.

Question 12

A patient has a blockage in the left coronary artery. Which area of the heart is most likely to be affected?

Accepted Answer

Left atrium and left ventricle.

Question 13

Which valve prevents backflow of blood from the aorta into the left ventricle?

Accepted Answer

Aortic semilunar valve.

Question 14

If the pressure in the left ventricle is greater than the pressure in the aorta, what event occurs?

Accepted Answer

The aortic semilunar valve opens.

Question 15

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

Accepted Answer

It pumps blood to the lungs, which are close and require less pressure.

Question 16

Which of the following statements about coronary circulation is correct?

Accepted Answer

Coronary arteries supply the myocardium with oxygenated blood primarily during ventricular relaxation.

Question 17

Which of the following is a direct result of the fibrous skeleton acting as an electrical insulator?

Accepted Answer

It ensures that electrical impulses travel from the atria to the ventricles only through the AV node.

Question 18

A patient with damage to the papillary muscles is most likely to experience which complication?

Accepted Answer

Valve regurgitation due to inability to prevent valve inversion during ventricular contraction.

Question 19

Which formula can be used to calculate mean arterial pressure (MAP) given systolic and diastolic pressures?

Accepted Answer

$$MAP = \frac{1}{3} (SBP - DBP) + DBP$$

Question 20

Which of the following best describes the function of the heart valves during the cardiac cycle?

Accepted Answer

They open and close in response to pressure differences across the chambers.

Cardiovascular System: Heart Structure and Function Study Notes

Study Guide - Practice Questions