Q: A patient has a blood pressure of 120/90 mmHg. Using the formula $$MAP = \frac{1}{3}(Systolic) + \frac{2}{3}(Diastolic)$$, what is their mean arterial pressure (MAP)?

$$MAP = \frac{120 + 2 \times 90}{3} = 100$$ mmHg

Question 1

Which of the following equations correctly represents the relationship between mean arterial pressure (MAP), cardiac output (CO), and total peripheral resistance (TPR)?

Accepted Answer

$$MAP = CO 	imes TPR$$

Question 2

A patient has a blood pressure of 120/90 mmHg. Using the formula $$MAP = \frac{1}{3}(Systolic) + \frac{2}{3}(Diastolic)$$, what is their mean arterial pressure (MAP)?

Accepted Answer

$$MAP = \frac{120 + 2 	imes 90}{3} = 100$$ mmHg

Question 3

Which type of artery acts as a pressure reservoir and helps maintain continuous blood flow during ventricular diastole?

Accepted Answer

Elastic artery

Question 4

Which of the following factors has the greatest influence on total peripheral resistance (TPR)?

Accepted Answer

Blood vessel radius

Question 5

A patient with polycythemia (increased red blood cell count) is likely to have which of the following changes in their cardiovascular system?

Accepted Answer

Increased blood viscosity and increased TPR

Question 6

Which of the following best describes the primary function of continuous capillaries in the brain?

Accepted Answer

They form the blood-brain barrier with tight junctions and no intercellular clefts.

Question 7

Which adaptation in veins helps compensate for low venous pressure and ensures blood returns to the heart?

Accepted Answer

Venous valves

Question 8

Bulk flow across capillary walls is primarily driven by which of the following forces?

Accepted Answer

Pressure gradients (hydrostatic and colloid osmotic pressures)

Question 9

Which of the following scenarios would most likely result in edema (swelling) due to increased interstitial fluid?

Accepted Answer

Blockage of lymphatic vessels

Question 10

Which type of capillary is most permeable and found in the liver, bone marrow, and spleen?

Accepted Answer

Sinusoid capillary

Question 11

If a patient experiences a sudden increase in sympathetic stimulation, which of the following changes would you expect?

Accepted Answer

Increased heart rate, increased stroke volume, and increased blood pressure

Question 12

Which of the following is a correct description of the role of arterioles in regulating blood flow?

Accepted Answer

They control flow into capillary beds via vasodilation and vasoconstriction.

Question 13

Which of the following best explains why low capillary pressure is desirable?

Accepted Answer

It prevents rupture of fragile, thin-walled capillaries.

Question 14

Which of the following is the primary mechanism for moving fluids and small solutes between blood and surrounding tissues in capillaries?

Accepted Answer

Bulk flow driven by pressure gradients

Question 15

Which of the following would most likely increase mean arterial pressure (MAP)?

Accepted Answer

Increased total peripheral resistance

Question 16

Which of the following is a feature of veins that helps promote blood flow back to the heart during exercise?

Accepted Answer

Contraction of skeletal muscles 'milking' blood toward the heart

Question 17

Which of the following best describes the effect of the RAAS (Renin-Angiotensin-Aldosterone System) on blood pressure?

Accepted Answer

It increases sodium and water reabsorption, raising blood pressure.

Question 18

Which of the following is true regarding the distribution of blood volume in the body?

Accepted Answer

Veins contain the largest percentage of blood volume.

Question 19

A decrease in plasma albumin concentration would most likely result in which of the following?

Accepted Answer

Decreased capillary colloid osmotic pressure and increased risk of edema

Question 20

Which of the following best describes the difference between fenestrated and sinusoid capillaries?

Accepted Answer

Fenestrated capillaries have tight junctions and are least permeable, while sinusoids have large gaps and are most permeable.

Cardiovascular System: Blood Vessels and Pressure (Chapter 19 Study Guide)

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