$$\Delta P = 5 \times 20 = 100 mm Hg$$

Question 1

Which of the following best describes the function of the tunica media in blood vessels?

Accepted Answer

It is responsible for vasoconstriction and vasodilation due to its smooth muscle content.

Question 2

A patient presents with swelling in their lower limbs due to excess water in the interstitial fluid. Which condition is most likely responsible?

Accepted Answer

Edema

Question 3

Which equation correctly relates blood pressure, cardiac output, and peripheral resistance?

Accepted Answer

$$\Delta P = CO 	imes PR$$

Question 4

Which of the following is a unique structural feature of veins compared to arteries?

Accepted Answer

Presence of valves to prevent backflow

Question 5

A decrease in blood vessel radius will have what effect on peripheral resistance and blood flow?

Accepted Answer

Increase peripheral resistance and decrease blood flow

Question 6

Which type of capillary is most likely to be found in the liver and allows the passage of large substances?

Accepted Answer

Sinusoidal capillary

Question 7

If a person has a cardiac output (CO) of 5 L/min and a peripheral resistance (PR) of 20 mm Hg/L/min, what is their pressure gradient ($$\Delta P$$)?

Accepted Answer

$$\Delta P = 5 	imes 20 = 100 mm Hg$$

Question 8

Which mechanism is primarily responsible for long-term regulation of blood pressure?

Accepted Answer

Renal regulation of blood volume

Question 9

Which hormone would most likely increase blood pressure by increasing sodium and water reabsorption in the kidneys?

Accepted Answer

Aldosterone

Question 10

A patient with atherosclerosis is at increased risk for which of the following complications?

Accepted Answer

Formation of plaques in the tunica intima

Question 11

Which of the following best explains why blood pressure is lower in veins than in arteries?

Accepted Answer

Blood pressure decreases as blood moves further from the heart due to resistance

Question 12

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

Accepted Answer

Increased peripheral resistance

Question 13

Which of the following is a function of baroreceptors in the cardiovascular system?

Accepted Answer

Detect changes in blood pressure and send signals to the medulla oblongata

Question 14

Which of the following best describes the effect of the skeletal muscle pump on venous return?

Accepted Answer

It increases venous return by squeezing veins during muscle contraction.

Question 15

A patient with hypotension is most likely to experience which of the following symptoms?

Accepted Answer

Dizziness and loss of consciousness

Question 16

Which of the following would most likely occur if the precapillary sphincters in a capillary bed are closed?

Accepted Answer

Blood is diverted through a vascular shunt

Question 17

Which of the following is the correct formula for cardiac output (CO)?

Accepted Answer

$$CO = SV 	imes HR$$

Question 18

Which of the following best describes the effect of increased blood volume on blood pressure?

Accepted Answer

Blood pressure increases, but veins accommodate most of the increase due to their compliance

Question 19

Which hormone acts to decrease blood pressure by promoting sodium and water excretion by the kidneys?

Accepted Answer

Atrial natriuretic peptide (ANP)

Question 20

A patient with chronic hypertension is at increased risk for which of the following complications?

Accepted Answer

Stroke and heart failure

The Cardiovascular System: Blood Vessels and Blood Pressure Regulation

Study Guide - Practice Questions