Question 1

Which layer of a blood vessel is primarily responsible for controlling the diameter of the vessel and thus regulating blood pressure?

Accepted Answer

Tunica media

Question 2

A patient presents with varicose veins in the lower limbs. Which structural feature of veins is most likely compromised, leading to this condition?

Accepted Answer

Valves within the veins

Question 3

During vigorous exercise, blood flow to skeletal muscles increases. Which mechanism is primarily responsible for this change?

Accepted Answer

Extensive vasodilation of arterioles

Question 4

Which of the following best describes the function of precapillary sphincters in capillary beds?

Accepted Answer

They control the entry of blood into capillaries, adjusting local blood flow.

Question 5

Blood pressure is recorded as systolic over diastolic pressure. If a patient has a blood pressure of 140/90 mm Hg, which value represents the pressure during ventricular relaxation?

Accepted Answer

90 mm Hg

Question 6

Which equation correctly represents the relationship between blood flow ($$F$$), pressure difference ($$\Delta P$$), and vascular resistance ($$R$$)?

Accepted Answer

$$F = \Delta P / R$$

Question 7

A blockage in the hepatic portal vein would most directly affect which physiological process?

Accepted Answer

Detoxification of blood from digestive organs

Question 8

Which of the following mechanisms is responsible for the movement of water out of capillaries and into surrounding tissues at the arterial end?

Accepted Answer

Capillary hydrostatic pressure (CHP)

Question 9

Which of the following changes occurs in fetal circulation at birth?

Accepted Answer

The foramen ovale closes, separating the right and left atria.

Question 10

Which of the following is a direct effect of aging on the cardiovascular system?

Accepted Answer

Formation of atherosclerotic plaques in the tunica media

Question 11

Which vessel carries oxygenated blood from the placenta to the fetus during fetal development?

Accepted Answer

Umbilical vein

Question 12

Which of the following best explains why veins have thinner walls than arteries?

Accepted Answer

Veins carry blood under lower pressure and require less structural support.

Question 13

Which of the following is NOT a function of capillary exchange?

Accepted Answer

Generating action potentials for muscle contraction

Question 14

A patient loses a significant amount of blood due to trauma. Which immediate cardiovascular response is expected?

Accepted Answer

Increase in cardiac output and peripheral resistance

Question 15

Which of the following arteries is NOT a direct branch of the aortic arch?

Accepted Answer

Right subclavian artery

Question 16

Which mechanism is primarily responsible for the reabsorption of water into capillaries at the venous end?

Accepted Answer

High blood osmotic pressure

Question 17

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

Accepted Answer

It compresses veins, pushing blood toward the heart and preventing pooling.

Question 18

Which of the following statements about anastomoses is correct?

Accepted Answer

Arterial anastomosis ensures blood delivery to key organs even if one vessel is blocked.

Question 19

If the total blood vessel length in the body increases, what is the expected effect on vascular resistance and blood flow, assuming pressure remains constant?

Accepted Answer

Vascular resistance increases and blood flow decreases.

Question 20

Which vein is commonly harvested for use in coronary artery bypass surgery?

Accepted Answer

Great saphenous vein

Chapter 13: Blood Vessels and Circulation – Anatomy & Physiology Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards