Question 1

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

Accepted Answer

Tunica media

Question 2

A patient presents with a blood vessel that has a lumen diameter of 1.5 cm and a wall thickness of 1.0 mm. Based on Table 32.1, which type of vessel is this most likely to be?

Accepted Answer

Elastic (conducting) artery

Question 3

Which of the following best describes the function of capillaries?

Accepted Answer

Provide for the exchange of materials (gases, nutrients, etc.) between blood and tissue cells

Question 4

If a muscular artery is observed under a microscope, which feature would most likely distinguish it from a vein in the same section?

Accepted Answer

Thicker tunica media with more smooth muscle

Question 5

Which vessel type is most likely to be affected in a patient with chronic hypertension, leading to increased risk of aneurysm due to its elastic properties?

Accepted Answer

Elastic (conducting) arteries

Question 6

Calculate the wall-to-lumen ratio for an arteriole given an average lumen diameter of $$37\ \mu m$$ and an average wall thickness of $$6\ \mu m.$$

Accepted Answer

$$0.16$$

Question 7

Which branch of the aortic arch supplies blood to the right side of the head and neck and the right upper limb?

Accepted Answer

Brachiocephalic trunk

Question 8

A blockage in the superior mesenteric artery would most directly affect which organ system?

Accepted Answer

Small intestine and part of the large intestine

Question 9

Which of the following statements about veins is correct?

Accepted Answer

Veins contain more fibrous tissue in the tunica externa than arteries

Question 10

During fetal circulation, which vessel carries oxygenated blood from the placenta to the fetus?

Accepted Answer

Umbilical vein

Question 11

Which vessel is responsible for draining blood from the brain into the internal jugular vein?

Accepted Answer

Superior sagittal sinus

Question 12

A patient has a clot in the popliteal artery. Which area is most likely to experience reduced blood flow?

Accepted Answer

Lower leg and foot

Question 13

Which of the following best explains why veins have valves?

Accepted Answer

To prevent the backflow of blood

Question 14

Which vessel type is most important for regulating blood flow to specific areas of the body?

Accepted Answer

Arterioles

Question 15

If the left common carotid artery is blocked, which region will most likely be deprived of oxygenated blood?

Accepted Answer

Left side of the head and neck

Question 16

Which of the following is a correct sequence of blood flow from the heart to the right hand?

Accepted Answer

Aorta → Brachiocephalic trunk → Right subclavian artery → Axillary artery → Brachial artery → Radial/ulnar artery

Question 17

Which vessel supplies blood to the kidneys?

Accepted Answer

Renal artery

Question 18

A patient with liver disease may have impaired drainage in which vein, leading to portal hypertension?

Accepted Answer

Hepatic vein

Question 19

Which of the following equations correctly calculates the cross-sectional area $$A of a $$capillary with a lumen diameter $$d = 9\ \mu m$$?

Accepted Answer

$$A = \pi \left( \frac{d}{2} \$$right)^2$$

Question 20

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

Accepted Answer

Left subclavian artery

Anatomy of Blood Vessels: Structure, Function, and Major Pathways

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