Question 1

Which of the following best describes the function of arteries in the circulatory system?

Accepted Answer

They carry blood away from the heart under high pressure.

Question 2

What is the primary role of capillaries in tissue health?

Accepted Answer

To allow for the exchange of gases, nutrients, and waste between blood and tissues.

Question 3

Which equation best represents the relationship between blood flow ($$Q$$), pressure difference ($$\Delta P$$), and resistance ($$R) in a $$vessel?

Accepted Answer

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

Question 4

Why does blood velocity decrease as it enters the capillary beds?

Accepted Answer

Because the total cross-sectional area of capillaries is much greater than that of arteries.

Question 5

Which of the following is a major function of the lymphatic system?

Accepted Answer

Returning excess interstitial fluid to the bloodstream.

Question 6

A blockage in the coronary arteries is dangerous because:

Accepted Answer

It prevents oxygenated blood from reaching the heart muscle, leading to tissue death.

Question 7

Which statement about fetal circulation is correct?

Accepted Answer

Fetal blood bypasses the lungs via the ductus arteriosus and foramen ovale.

Question 8

What is the function of the hepatic portal system?

Accepted Answer

To carry nutrient-rich blood from the digestive tract to the liver for processing.

Question 9

Which of the following best explains why veins and arteries are often paired together in the body?

Accepted Answer

To facilitate efficient exchange of heat and substances between blood vessels.

Question 10

Which of the following is NOT a function of lymph nodes?

Accepted Answer

Regulating blood pressure in arteries.

Question 11

If net bulk flow ($$J) $$across a capillary wall is determined by hydrostatic pressure ($$P_h) $$and osmotic pressure ($$P_o$$), which equation best describes this relationship?

Accepted Answer

$$J = P_h - P_o$$

Question 12

Which of the following would most likely cause lymph nodes to swell?

Accepted Answer

An infection causing increased immune cell activity.

Question 13

Which vessel type is primarily responsible for regulating blood pressure by changing its diameter?

Accepted Answer

Arterioles

Question 14

Which of the following best describes the pulmonary circuit?

Accepted Answer

It carries deoxygenated blood from the right ventricle to the lungs and returns oxygenated blood to the left atrium.

Question 15

Which of the following is a correct statement about blood pressure?

Accepted Answer

Blood pressure is highest in the arteries and lowest in the veins.

Question 16

Which of the following is a major difference between fetal and adult circulation?

Accepted Answer

Fetal circulation bypasses the lungs using special shunts.

Question 17

Which of the following best describes the role of the lymphatic system in fluid balance?

Accepted Answer

It returns excess interstitial fluid to the bloodstream, preventing edema.

Question 18

Which of the following is a correct description of a capillary bed?

Accepted Answer

A network of tiny blood vessels where exchange of gases, nutrients, and waste occurs.

Question 19

Which of the following is a consequence of a blockage in the hepatic portal vein?

Accepted Answer

Impaired nutrient processing and detoxification in the liver.

Question 20

Which of the following best explains why capillaries can move molecules in and out without just using pressure?

Accepted Answer

Capillaries use both hydrostatic and osmotic pressure gradients to facilitate exchange.

Cardiovascular and Lymphatic Systems: Blood Vessels, Circulation, and Lymphatics

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