Q: Calculate the mean arterial pressure (MAP) for a patient with a blood pressure of 150/90 mm Hg.

$$\text{MAP} = 90 + \frac{1}{3}(150-90) = 90 + 20 = 110\ \text{mm Hg}$$

Question 1

Which layer of a typical blood vessel wall is primarily responsible for vasoconstriction and vasodilation, and what is its main tissue type?

Accepted Answer

Tunica media; smooth muscle

Question 2

A patient with chronic hypertension is at increased risk for which of the following complications due to the effects of high blood pressure on blood vessels?

Accepted Answer

Heart failure due to myocardial hypertrophy

Question 3

Which type of capillary is most likely to be found in the liver and bone marrow, and what is its main structural feature?

Accepted Answer

Sinusoidal capillary; large lumens and incomplete basement membranes

Question 4

If the radius of a blood vessel doubles, what happens to the resistance to blood flow, according to Poiseuille’s law?

Accepted Answer

Resistance decreases to 1/16 of its original value

Question 5

Calculate the mean arterial pressure (MAP) for a patient with a blood pressure of 150/90 mm Hg.

Accepted Answer

$$	ext{MAP} = 90 + \frac{1}{3}(150-90) = 90 + 20 = 110\ 	ext{mm Hg}$$

Question 6

Which of the following best describes the function of venous valves?

Accepted Answer

They prevent backflow of blood in veins, especially in the limbs

Question 7

A patient is experiencing edema due to liver disease. Which mechanism best explains this phenomenon?

Accepted Answer

Decreased capillary colloid osmotic pressure due to low plasma proteins

Question 8

Which hormone acts as a potent vasoconstrictor and stimulates aldosterone secretion as part of the indirect renal mechanism for blood pressure regulation?

Accepted Answer

Angiotensin II

Question 9

During exercise, blood flow to skeletal muscles increases dramatically. Which mechanism is primarily responsible for this local increase?

Accepted Answer

Intrinsic metabolic vasodilation

Question 10

Which of the following equations correctly represents the relationship between blood flow (F), pressure gradient (ΔP), and resistance (R)?

Accepted Answer

$$F = \frac{\Delta P}{R}$$

Question 11

A patient stands up quickly and feels dizzy due to a sudden drop in blood pressure. Which reflex is primarily responsible for correcting this change?

Accepted Answer

Baroreceptor reflex

Question 12

Which of the following best describes the role of the vasa vasorum?

Accepted Answer

It provides nutrients to the outer layers of large blood vessels

Question 13

Which of the following would most likely increase peripheral resistance and thus raise blood pressure?

Accepted Answer

Vasoconstriction of arterioles

Question 14

Which of the following is a direct effect of atrial natriuretic peptide (ANP) on blood pressure?

Accepted Answer

Decreases blood pressure by antagonizing aldosterone

Question 15

Which of the following best explains why capillary blood pressure is lower than arterial blood pressure?

Accepted Answer

Capillaries are farther from the heart and have a large total cross-sectional area

Question 16

A patient with atherosclerosis has fatty plaques in their arteries. How does this condition affect blood flow?

Accepted Answer

It increases resistance and decreases blood flow

Question 17

Which of the following is a characteristic of veins but not arteries?

Accepted Answer

Valves to prevent backflow

Question 18

Which of the following is the correct formula for net filtration pressure (NFP) at a capillary bed?

Accepted Answer

$$	ext{NFP} = (HP_c + OP_{if}) - (HP_{if} + OP_c)$$

Question 19

Which of the following best describes the effect of sympathetic stimulation on veins during exercise?

Accepted Answer

It causes venoconstriction, increasing venous return

The Cardiovascular System: Blood Vessels – Structure, Function, and Regulation

Study Guide - Practice Questions

Study Guide - Flashcards