Question 1

Which of the following best describes the main structural difference between arteries and veins?

Accepted Answer

Arteries have thicker walls, more smooth muscle, and are more elastic than veins.

Question 2

A patient has a blockage in the pulmonary trunk. Which of the following will be directly affected?

Accepted Answer

Oxygen-poor blood traveling to the lungs

Question 3

Which type of capillary is most likely to be found in the liver, allowing for the passage of large molecules?

Accepted Answer

Sinusoid capillary

Question 4

Which vessel type is primarily responsible for controlling blood flow into capillary beds?

Accepted Answer

Arterioles

Question 5

A blood clot in the left common carotid artery would most directly reduce blood supply to which area?

Accepted Answer

Left side of the brain

Question 6

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

Accepted Answer

$$Q = \Delta P / R$$

Question 7

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

Accepted Answer

Left subclavian artery

Question 8

A patient with a damaged internal elastic membrane would most likely have a problem in which vessel layer?

Accepted Answer

Tunica intima

Question 9

Which of the following best explains why veins in the limbs have valves, but arteries do not?

Accepted Answer

Valves in veins prevent backflow due to low pressure and gravity.

Question 10

Which vessel carries oxygenated blood from the lungs to the heart?

Accepted Answer

Pulmonary vein

Question 11

A patient has a blockage in the superior mesenteric artery. Which organ is most likely to be affected?

Accepted Answer

Small intestine

Question 12

Which of the following is a paired branch of the abdominal aorta?

Accepted Answer

Renal artery

Question 13

Which of the following veins drains blood from the brain and empties into the brachiocephalic vein?

Accepted Answer

Internal jugular vein

Question 14

Which of the following best describes the hepatic portal system?

Accepted Answer

It drains blood from the digestive organs to the liver before returning to the heart.

Question 15

Which vessel is responsible for collecting blood from the capillaries and is the smallest type of vein?

Accepted Answer

Venule

Question 16

A patient with a deep vein thrombosis in the femoral vein is at risk for which of the following complications?

Accepted Answer

Pulmonary embolism due to clot migration to the lungs

Question 17

Which of the following arteries supplies blood to the medial side of the thigh and pelvic organs?

Accepted Answer

Internal iliac artery

Question 18

Which of the following is a function of precapillary sphincters?

Accepted Answer

They regulate blood flow into capillary beds based on tissue oxygen demand.

Question 19

Which of the following best describes the path of blood returning from the lower limb to the heart?

Accepted Answer

Femoral vein → external iliac vein → common iliac vein → inferior vena cava

Question 20

Which of the following is true regarding the Circle of Willis?

Accepted Answer

It is an arterial anastomosis that provides collateral circulation to the brain.

The Cardiovascular System: Blood Vessels and Circulation

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