Question 1

Which of the following best explains why arteries have a thicker tunica media than veins?

Accepted Answer

Arteries must withstand and regulate higher blood pressure generated by the heart.

Question 2

A patient presents with swelling in the lower limbs due to incompetent venous valves. What is the most likely diagnosis?

Accepted Answer

Varicose veins

Question 3

Which type of capillary is most abundant in the kidneys and small intestine, and why?

Accepted Answer

Fenestrated capillaries, because their pores facilitate rapid filtration and absorption.

Question 4

Which equation correctly represents Net Filtration Pressure (NFP) at the capillary bed?

Accepted Answer

$$NFP = HP_c - OP_c$$

Question 5

A patient with chronic hypertension is at risk for which of the following vascular changes?

Accepted Answer

Thickening of arterial walls due to increased tunica media

Question 6

Which of the following best describes the role of the skeletal muscle pump in venous return?

Accepted Answer

It contracts veins to propel blood toward the heart, aided by one-way valves.

Question 7

Which hormone is released from the right atrium in response to high blood pressure and acts to lower blood pressure?

Accepted Answer

Atrial natriuretic peptide (ANP)

Question 8

A patient loses a significant amount of blood in an accident. Which type of shock are they most likely to experience?

Accepted Answer

Hypovolemic shock

Question 9

Which of the following is a correct formula for Mean Arterial Pressure (MAP)?

Accepted Answer

$$MAP = CO 	imes PR$$

Question 10

Which of the following best describes the function of the Circle of Willis?

Accepted Answer

It forms an arterial anastomosis to ensure constant blood supply to the brain.

Question 11

Which of the following changes would most likely increase peripheral resistance (PR) and thus blood pressure?

Accepted Answer

Decreased vessel diameter

Question 12

Which vessel is most commonly used for coronary artery bypass graft (CABG) surgery?

Accepted Answer

Great saphenous vein

Question 13

Which of the following best describes the difference between laminar and turbulent blood flow?

Accepted Answer

Laminar flow is smooth and silent, while turbulent flow is disrupted and audible.

Question 14

Which of the following is a feature unique to veins but not arteries?

Accepted Answer

Presence of one-way valves

Question 15

A patient with liver disease develops edema due to decreased plasma proteins. Which pressure is most directly affected?

Accepted Answer

Capillary colloid osmotic pressure ($$OP_c)$$

Question 16

Which of the following best describes the function of precapillary sphincters?

Accepted Answer

They regulate blood flow into true capillaries based on tissue needs.

Question 17

Which fetal vessel carries oxygen-rich blood from the placenta to the fetus?

Accepted Answer

Umbilical vein

Question 18

Which of the following is a correct description of a portal system?

Accepted Answer

A system where blood passes through two consecutive capillary beds before returning to the heart.

Question 19

Which of the following would most likely result from a tumor compressing a major vein returning blood to the heart?

Accepted Answer

Obstructed venous return shock

Question 20

Which of the following best explains why blood flow is slowest in the capillaries?

Accepted Answer

Capillaries have the largest total cross-sectional area, allowing more time for exchange.

Blood Vessels and Circulation: Structure, Function, and Clinical Relevance

Study Guide - Practice Questions