$$MAP = \text{Diastolic Pressure} + \frac{1}{3} \text{Pulse Pressure}$$

Question 1

Which of the following best describes the function of the tunica media in arteries?

Accepted Answer

It contains concentric sheets of smooth muscle that regulate vessel diameter.

Question 2

A patient presents with a bulge in the wall of their abdominal aorta. What is the most likely cause of this condition?

Accepted Answer

Weak spot in elastic fibers of the arterial wall, resulting in an aneurysm.

Question 3

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

Accepted Answer

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

Question 4

Which of the following capillary types is most likely to be found in the liver and allows free exchange of water and large plasma proteins?

Accepted Answer

Sinusoidal capillaries (sinusoids)

Question 5

During heavy exercise, which of the following changes occurs in the cardiovascular system?

Accepted Answer

Cardiac output increases to about four times the resting level.

Question 6

Which formula is used to calculate mean arterial pressure (MAP)?

Accepted Answer

$$MAP = 	ext{Diastolic Pressure} + \frac{1}{3} 	ext{Pulse Pressure}$$

Question 7

A patient with chronic dehydration is likely to experience which change in capillary dynamics?

Accepted Answer

Increased BCOP, accelerating reabsorption of fluid into capillaries.

Question 8

Which of the following is NOT a mechanism by which materials move across capillary walls?

Accepted Answer

Active transport

Question 9

What is the primary effect of natriuretic peptides (ANP and BNP) on the cardiovascular system?

Accepted Answer

Reduce blood volume and blood pressure by promoting sodium and water excretion.

Question 10

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

Accepted Answer

They stretch more than arteries, allowing them to act as blood reservoirs.

Question 11

A patient suffers a hemorrhage resulting in a significant drop in blood pressure. Which immediate cardiovascular response is most likely to occur?

Accepted Answer

Peripheral vasoconstriction and increased cardiac output.

Question 12

Which of the following is a correct expression for net filtration pressure (NFP) in capillary exchange?

Accepted Answer

$$NFP = (CHP - IHP) - (BCOP - ICOP)$$

Question 13

Which of the following would most likely result in edema?

Accepted Answer

Decline in BCOP or rise in CHP, causing fluid to move out of blood into tissues.

Question 14

Which of the following statements about the baroreceptor reflex is correct?

Accepted Answer

It increases cardiac output and causes peripheral vasoconstriction when blood pressure falls.

Question 15

Which of the following is a direct effect of epinephrine on the heart during increased activity?

Accepted Answer

Increases heart rate, strengthens contractions, and dilates coronary vessels.

Question 16

Which of the following best describes the effect of aging on the cardiovascular system?

Accepted Answer

Venous valves deteriorate, leading to pooling of blood in the legs.

Question 17

Which of the following is a real-life scenario illustrating the effect of the respiratory pump on venous return?

Accepted Answer

Increased venous return during inhalation as thoracic cavity pressure decreases.

Question 18

Which of the following is a correct description of the effect of local vasodilators on blood flow?

Accepted Answer

They promote dilation of precapillary sphincters, increasing blood flow.

Question 19

Which of the following best explains why the brain receives prioritized blood flow during peripheral vasoconstriction?

Accepted Answer

Cerebral vessels dilate, normalizing blood flow to the brain despite peripheral constriction.

Question 20

Which of the following is a consequence of regular, moderate exercise on cardiovascular health?

Accepted Answer

Reduces risk of myocardial infarction by almost half.

Blood Vessels and Circulation: Structure, Function, and Regulation

Study Guide - Practice Questions