Question 1

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

Accepted Answer

Myocardium

Question 2

What is the primary function of the capillaries in the cardiovascular system?

Accepted Answer

Permit exchange of gases, nutrients, and wastes

Question 3

A patient presents with pericarditis and develops cardiac tamponade. What is the physiological consequence of cardiac tamponade?

Accepted Answer

Restricted heart movement due to excess pericardial fluid

Question 4

Which vessel delivers deoxygenated blood from the lower limbs to the right atrium?

Accepted Answer

Inferior vena cava

Question 5

During fetal development, which structure allows blood to bypass the lungs by connecting the pulmonary trunk to the aortic arch?

Accepted Answer

Ductus arteriosus

Question 6

What is the correct sequence for the path of a drop of blood starting at the superior vena cava through the heart?

Accepted Answer

Right atrium → Right ventricle → Pulmonary trunk → Lungs → Left atrium → Left ventricle → Aorta

Question 7

Which heart valve prevents backflow of blood from the left ventricle to the left atrium?

Accepted Answer

Left atrioventricular (bicuspid/mitral) valve

Question 8

What is the function of the coronary sinus?

Accepted Answer

Drains blood from the heart wall into the right atrium

Question 9

Which of the following statements about the left ventricle is correct?

Accepted Answer

It has a much thicker wall than the right ventricle

Question 10

Which structure is a remnant of fetal circulation that allowed blood to flow directly from the right atrium to the left atrium?

Accepted Answer

Fossa ovalis

Question 11

What is the main histological feature that distinguishes cardiac muscle cells from other muscle types?

Accepted Answer

Presence of intercalated discs

Question 12

A myocardial infarction results in which of the following cellular changes?

Accepted Answer

Replacement of dying cells with scar tissue

Question 13

Which equation best represents the relationship between cardiac output (CO), heart rate (HR), and stroke volume (SV)?

Accepted Answer

$$CO = HR 	imes SV$$

Question 14

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

Accepted Answer

Providing nutrients to the myocardium

Question 15

If the foramen ovale remains open after birth (patent foramen ovale), what is the most likely consequence?

Accepted Answer

Oxygenated blood passes from the left atrium to the right atrium

Question 16

Which of the following arteries supplies blood to the anterior interventricular septum and anterior walls of both ventricles?

Accepted Answer

Left anterior descending (LAD) artery

Question 17

Which of the following best describes the role of the atrioventricular (AV) valves during ventricular contraction?

Accepted Answer

They close to prevent backflow of blood into the atria

Question 18

Which of the following is true regarding the systemic circuit?

Accepted Answer

It carries blood to and from the rest of the body

Question 19

Which of the following statements about veins is correct?

Accepted Answer

Veins carry blood to the heart

Question 20

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

Accepted Answer

It pumps blood to the entire body through the systemic circuit

The Heart and Cardiovascular System: Structure and Function

Study Guide - Practice Questions