Q: Which equation correctly represents the calculation of mean arterial pressure (MAP)?

$$MAP = \text{diastolic pressure} + \frac{\text{pulse pressure}}{3}$$

Q: If capillary hydrostatic pressure (CHP) at the arterial end is 35 mm Hg, blood colloid osmotic pressure (BCOP) is 25 mm Hg, and interstitial fluid hydrostatic and colloid osmotic pressures are both 0 mm Hg, what is the net filtration pressure (NFP) at the arterial end?

$$NFP = 35 - 25 = 10 \text{ mm Hg}$$

Question 1

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

Accepted Answer

They are more distensible than arteries and can accommodate large changes in blood volume.

Question 2

A patient presents with swelling in the lower legs due to blood pooling. Which of the following is the most likely cause?

Accepted Answer

Failure of venous valves leading to varicose veins.

Question 3

Which type of capillary would you expect to find in the liver, and what is its primary function?

Accepted Answer

Sinusoid; permits exchange of water and large plasma proteins.

Question 4

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

Accepted Answer

$$MAP = 	ext{diastolic pressure} + \frac{	ext{pulse pressure}}{3}$$

Question 5

A patient with atherosclerosis is at increased risk for which of the following due to abnormal turbulence in blood flow?

Accepted Answer

Formation of a bruit, an audible vascular sound.

Question 6

Which of the following changes would most likely increase the total peripheral resistance in the cardiovascular system?

Accepted Answer

Increasing vessel length.

Question 7

During heavy exercise, which of the following occurs to maintain adequate blood flow to skeletal muscles?

Accepted Answer

Increased cardiac output and vasodilation in skeletal muscle.

Question 8

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

Accepted Answer

They control blood flow through capillary beds by opening and closing certain capillaries.

Question 9

If capillary hydrostatic pressure (CHP) at the arterial end is 35 mm Hg, blood colloid osmotic pressure (BCOP) is 25 mm Hg, and interstitial fluid hydrostatic and colloid osmotic pressures are both 0 mm Hg, what is the net filtration pressure (NFP) at the arterial end?

Accepted Answer

$$NFP = 35 - 25 = 10 	ext{ mm Hg}$$

Question 10

Which hormone is released in response to low blood volume and increases blood pressure by promoting water reabsorption at the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 11

A patient is experiencing a rapid drop in blood pressure due to hemorrhage. Which immediate compensatory mechanism is most likely to occur?

Accepted Answer

Peripheral vasoconstriction and increased heart rate.

Question 12

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

Accepted Answer

Stimulates vasoconstriction and increases aldosterone secretion.

Question 13

Which of the following best describes the difference between arteries and veins in terms of structure and function?

Accepted Answer

Arteries have thicker walls, more smooth muscle, and maintain their shape better than veins.

Question 14

Which of the following would most likely result in edema in peripheral tissues?

Accepted Answer

Increased CHP or decreased BCOP.

Question 15

Which of the following is a function of the vasa vasorum?

Accepted Answer

Supplies blood to the cells of the tunica media and tunica externa in large vessels.

Question 16

Which of the following best describes the effect of regular moderate exercise on cardiovascular health?

Accepted Answer

Reduces low-density lipoproteins and slows plaque formation.

Question 17

Which of the following statements about capillary exchange is correct?

Accepted Answer

Diffusion, filtration, and reabsorption are all mechanisms of capillary exchange.

Question 18

Which of the following would most likely trigger the release of atrial natriuretic peptide (ANP)?

Accepted Answer

Excessive diastolic stretching of the right atrium due to high blood pressure.

Question 19

Which of the following is a likely consequence of age-related deterioration of venous valves?

Accepted Answer

Pooling of blood in the legs and development of varicose veins.

Question 20

Which of the following best describes the role of baroreceptors in blood pressure regulation?

Accepted Answer

They respond to stretch in the walls of major arteries and trigger reflexes to maintain blood pressure.

Blood Vessels and Circulation: Structure, Function, and Regulation

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