Easy Questions about the Cardiovascular System

1. What is the main function of the cardiovascular system?

• a) To transport oxygen and nutrients throughout the body.

• b) To regulate body temperature.

• c) To digest food.

• d) To filter waste products.

2. What are the three main types of blood vessels?

• a) Arteries, veins, and capillaries

• b) Arteries, veins, and lymph nodes

• c) Arteries, capillaries, and lymph vessels

• d) Veins, capillaries, and lymph vessels

3. What is the primary function of arteries?

• a) To carry deoxygenated blood back to the heart.

• b) To carry oxygenated blood away from the heart.

• c) To filter waste products from the blood.

• d) To produce blood cells.

4. What is the primary function of veins?

• a) To carry oxygenated blood away from the heart.

• b) To carry deoxygenated blood back to the heart.

• c) To regulate blood pressure.

• d) To store blood.

5. The layer of the heart responsible for contraction is the:

• A. pericardium

• B. myocardium

• C. epicardium

• D. endocardium

The vessels that carry oxygenated blood back to the heart and left atrium are the:

• A. capillaries.

• B. pulmonary veins.

• C. pulmonary arteries.

• D. pulmonary arterioles.

The normal pacemaker of the heart is:

• A. the SA node.

• B. the AV node.

• C. the bundle of His.

• D. the ventricles.

The pressure the ventricular muscle must generate to over-come the higher pressure in the aorta refers to:

• A. stroke volume

• B. contractility

• C. preload

• D. afterload

During systole, the ventricles contract.

This causes:

• A. all four heart valves to close.

• B. all four heart valves to open.

• C. the AV valves to close and the semilunar valves to open.

• D. the AV valves to open and the semilunar valves to close

What is the name for the rhythmic contraction and relaxation of the heart?

• a) Respiration

• b) Digestion

• c) Circulation

• d) Heartbeat

Answer explanation