Question 1

Which structure prevents backflow of blood from the right ventricle into the right atrium during ventricular contraction?

Accepted Answer

Tricuspid valve

Question 2

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

Accepted Answer

Left ventricle

Question 3

Which vessel carries oxygenated blood from the lungs to the left atrium?

Accepted Answer

Pulmonary veins

Question 4

During fetal development, the fossa ovalis is an opening between which two chambers?

Accepted Answer

Right and left atria

Question 5

Which of the following is the correct sequence of blood flow through the heart starting from the vena cava?

Accepted Answer

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

Question 6

Which structure connects the pulmonary trunk to the aorta in fetal circulation and becomes the ligamentum arteriosum after birth?

Accepted Answer

Ductus arteriosus

Question 7

The papillary muscles are responsible for:

Accepted Answer

Preventing prolapse of the atrioventricular valves during systole

Question 8

Which artery supplies blood to the myocardium of the heart?

Accepted Answer

Coronary artery

Question 9

A histological section of a blood vessel shows a thick tunica media with abundant smooth muscle. This vessel is most likely:

Accepted Answer

An artery

Question 10

Which equation best represents the relationship between blood flow ($$Q$$), pressure difference ($$\Delta P$$), and resistance ($$R) in $$the cardiovascular system?

Accepted Answer

$$Q = \frac{\Delta P}{R}$$

Question 11

Which vessel branches directly from the aortic arch to supply blood to the head and neck?

Accepted Answer

Brachiocephalic trunk

Question 12

If the mitral valve fails to close properly, which of the following is most likely to occur?

Accepted Answer

Blood will regurgitate into the left atrium during ventricular contraction

Question 13

Which of the following is NOT a branch of the abdominal aorta?

Accepted Answer

Brachiocephalic trunk

Question 14

The chordae tendineae attach to which structures in the heart?

Accepted Answer

Papillary muscles

Question 15

Which of the following best describes the function of the coronary sinus?

Accepted Answer

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

Question 16

Which histological feature is unique to cardiac muscle tissue and allows for rapid communication between cells?

Accepted Answer

Intercalated discs

Question 17

A patient presents with a blockage in the superior vena cava. Which chamber of the heart will be directly affected?

Accepted Answer

Right atrium

Question 18

Which of the following arteries supplies blood to the lower limbs?

Accepted Answer

Common iliac artery

Question 19

Which of the following is a correct description of the tunica intima in arteries?

Accepted Answer

It is the innermost layer composed of endothelial cells

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 systemic circulation, which requires higher pressure

Study Notes: The Cardiovascular System – Heart and Great Vessels

Study Guide - Practice Questions

Study Guide - Flashcards