Question 1

Which layer of a blood vessel is primarily responsible for vasoconstriction and vasodilation, and what type of tissue composes it?

Accepted Answer

Tunica media; composed of smooth muscle

Question 2

A patient presents with swelling, warmth, and erythema in the lower limb. Which vascular pathology is most likely responsible, and what is a major risk factor for its development?

Accepted Answer

Deep venous thrombosis; venous stasis

Question 3

Which type of capillary is most permeable and found in organs such as the liver, bone marrow, and spleen?

Accepted Answer

Sinusoid capillary

Question 4

What is the primary function of the vasa vasorum in large arteries and veins?

Accepted Answer

Supply and drain blood to the outer layers of the vessel wall

Question 5

Which vessel carries oxygenated blood from the lungs to the heart, and into which chamber does it empty?

Accepted Answer

Pulmonary vein; left atrium

Question 6

A sudden rupture of an abdominal aortic aneurysm is most likely to result in which clinical outcome if not recognized and treated immediately?

Accepted Answer

Severe hemorrhage and high mortality

Question 7

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

Accepted Answer

$$Q = \Delta P / R$$

Question 8

Which of the following arteries is a direct continuation of the external iliac artery after it passes through the inguinal canal?

Accepted Answer

Femoral artery

Question 9

Which vessel is most commonly used to obtain blood samples or administer intravenous fluids in the upper limb?

Accepted Answer

Median cubital vein

Question 10

Which of the following best describes the difference between pulmonary and systemic circulation?

Accepted Answer

Pulmonary circulation carries deoxygenated blood from the right ventricle to the lungs; systemic circulation carries oxygenated blood from the left ventricle to the body

Question 11

Which of the following veins returns blood from body regions superior to the diaphragm to the right atrium?

Accepted Answer

Superior vena cava

Question 12

Which of the following arteries supplies blood to the gluteal muscles in the buttock and passes through the greater sciatic notch?

Accepted Answer

Superior gluteal artery

Question 13

Which type of capillary is most abundant in the small intestine and glomeruli of the kidneys, and what structural feature allows for high rates of exchange?

Accepted Answer

Fenestrated capillary; pores in endothelium

Question 14

Which vessel is most likely to be palpated to take a pulse or compressed to stop bleeding in the lower limb?

Accepted Answer

Femoral artery

Question 15

Which of the following is a function of the skeletal muscle pump in venous return?

Accepted Answer

It compresses veins, forcing blood toward the heart and preventing backflow

Question 16

Which of the following best explains why veins have a larger lumen and thinner walls compared to arteries of the same size?

Accepted Answer

Veins store a larger volume of blood and operate under lower pressure

Question 17

Which of the following arteries is a branch of the aortic arch and supplies blood to the right side of the head and neck?

Accepted Answer

Brachiocephalic trunk

Question 18

Which equation describes the relationship between vessel radius ($$r) $$and resistance ($$R) to $$blood flow, according to Poiseuille's law?

Accepted Answer

$$R \propto 1 / r^4$

Question 19

Which of the following is true regarding the hepatic portal system?

Accepted Answer

It picks up digested nutrients from the intestines and delivers them to the liver for processing

Question 20

Which of the following best describes the function of intercellular clefts in continuous capillaries?

Accepted Answer

They allow small molecules to move in and out of capillaries

Cardiovascular System: Blood Vessels – Structure, Types, and Regional Vasculature

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