Question 1

Which layer of a blood vessel wall is primarily responsible for vasoconstriction and vasodilation?

Accepted Answer

Tunica media

Question 2

A patient presents with a deep vein thrombosis in the lower limb. Which structural feature of veins helps prevent backflow of blood, especially in the limbs?

Accepted Answer

Valves

Question 3

Which type of capillary is most likely to be found in the glomeruli of the kidneys, allowing for high rates of filtration?

Accepted Answer

Fenestrated capillary

Question 4

If a blood vessel has a diameter of 1 cm and a high elastin content, which type of artery is it most likely to be?

Accepted Answer

Elastic artery

Question 5

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

Accepted Answer

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

Question 6

Which of the following is a major structural difference between arteries and veins?

Accepted Answer

Arteries have more elastin in their walls than veins

Question 7

A patient with microangiopathy of diabetes is most likely to have damage in which type of blood vessel?

Accepted Answer

Capillaries

Question 8

Which of the following best explains why the pulmonary arteries are shown in blue in anatomical diagrams?

Accepted Answer

They carry oxygen-poor blood

Question 9

Which of the following is NOT a route for capillary permeability?

Accepted Answer

Vasa vasorum

Question 10

A patient has an aneurysm in the abdominal aorta. Which layer is most likely compromised, leading to the weakening of the vessel wall?

Accepted Answer

Tunica media

Question 11

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

Accepted Answer

Femoral artery

Question 12

Which of the following veins is commonly used for venipuncture or IV fluid administration?

Accepted Answer

Median cubital vein

Question 13

Which of the following best describes the hepatic portal system?

Accepted Answer

It carries nutrients from the digestive tract to the liver for processing

Question 14

Which equation would you use to calculate the resistance ($$R) in a $$blood vessel if you know the pressure difference ($$\Delta P) $$and blood flow ($$Q$$)?

Accepted Answer

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

Question 15

Which of the following arteries is a direct branch of the aortic arch?

Accepted Answer

Brachiocephalic trunk

Question 16

Which capillary type is most likely to be found in the liver and bone marrow, allowing passage of large molecules and cells?

Accepted Answer

Sinusoid capillary

Question 17

Which of the following is true regarding the blood–brain barrier?

Accepted Answer

Capillaries have complete tight junctions and no intercellular clefts

Question 18

Which vessel receives blood directly from the capillary beds and is the smallest type of vein?

Accepted Answer

Venule

Question 19

Which of the following arteries supplies the posterior part of the brain and forms the basilar artery?

Accepted Answer

Vertebral artery

Question 20

Which of the following is a consequence of atherosclerosis in adulthood?

Accepted Answer

Thickening and loss of elasticity in arterial walls

Blood Vessels: Structure, Types, and Circulation

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