Question 1

Which of the following best describes the function of arterioles in the circulatory system?

Accepted Answer

They serve as the main resistance vessels, regulating blood flow into capillary beds.

Question 2

A patient presents with swelling in the lower extremities due to increased venous pressure. Which condition is most likely responsible for this, and what is the underlying mechanism?

Accepted Answer

Varicose veins; incompetent venous valves cause blood pooling and increased hydrostatic pressure.

Question 3

Which blood vessel carries oxygenated blood to the deep parts of the pelvis?

Accepted Answer

Internal iliac artery

Question 4

What is the main force that drives fluid out of capillaries at the arterial end?

Accepted Answer

Hydrostatic pressure

Question 5

Which of the following equations correctly represents the calculation of mean arterial pressure (MAP)?

Accepted Answer

$$MAP = Diastolic\ Pressure + \frac{1}{3} (Systolic\ Pressure - Diastolic\ Pressure)$$

Question 6

Which vessel is responsible for draining blood from the brain and returning it to the heart?

Accepted Answer

Internal jugular vein

Question 7

A blood sample is taken from a vessel that carries blood from the digestive organs to the liver. Which vessel is this?

Accepted Answer

Hepatic portal vein

Question 8

Which of the following best explains why veins are called 'capacitance vessels'?

Accepted Answer

They can stretch and hold a large volume of blood with little increase in pressure.

Question 9

Which of the following is a correct statement about the direction of blood flow in pulmonary arteries and veins?

Accepted Answer

Pulmonary arteries carry deoxygenated blood to the lungs; pulmonary veins carry oxygenated blood to the heart.

Question 10

A patient has a blood pressure of 120/80 mmHg. What is the pulse pressure, and what does it represent?

Accepted Answer

$$Pulse\ Pressure = 40\ mmHg$$; it represents the difference between systolic and diastolic pressure.

Question 11

Which of the following best describes the effect of arteriosclerosis on blood pressure?

Accepted Answer

It increases blood pressure by reducing vessel compliance and increasing resistance.

Question 12

Which blood vessel supplies the distal 1/3 of the large intestine?

Accepted Answer

Inferior mesenteric artery

Question 13

A patient is found to have a blockage in the popliteal artery. Which area is most likely to experience reduced blood flow?

Accepted Answer

The lower leg and foot

Question 14

Which of the following best explains the difference between hydrostatic pressure and colloidal osmotic pressure in capillary exchange?

Accepted Answer

Hydrostatic pressure pushes fluid out of capillaries, while colloidal osmotic pressure pulls it in.

Question 15

Which of the following vessels is commonly used to collect blood during venipuncture?

Accepted Answer

Median cubital vein

Question 16

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

Accepted Answer

Arteries have thicker tunica media and smaller lumens compared to veins.

Question 17

Which vessel is responsible for supplying blood to most of the small intestine?

Accepted Answer

Superior mesenteric artery

Question 18

A patient with liver disease has reduced plasma protein levels. What effect does this have on capillary exchange?

Accepted Answer

Decreased colloidal osmotic pressure, leading to more fluid leaving the capillaries and causing edema.

Question 19

Which of the following best describes the path of blood flow from the left ventricle to the right atrium?

Accepted Answer

Left ventricle → aorta → arteries → arterioles → capillaries → venules → veins → right atrium

Cardiovascular System: Blood Vessels and Circulation – Study Guide

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