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The Cardiovascular System Practice Questions

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Updated on Sep 22, 2011

Review these concepts at : The Cardiovascular System Study Guide

Practice Questions

1. Which of the following is NOT one of the chambers in the four-chambered vertebrate heart?

a. right atrium

b. right ventricle

c. left alveolar

d. left ventricle

2. Which of the following is true about blood flow in the four-chambered vertebrate heart circulatory system?

a. Blood in the pulmonary vein is oxygenated.

b. Blood in the pulmonary artery is oxygenated.

c. Blood in the aorta is not oxygenated.

d. Blood in the vena cava is oxygenated.

3. Which of the following two items are the major components of blood?

a. proteins and lipids

b. plasma and cells

c. proteins and platelets

d. cells and lipids

4. Platelets perform which of the following functions?

a. blood clotting

b. carrying oxygen

c. carrying carbon dioxide

d. disease protection

5. Capillary beds occur between

a. arteries and veins.

b. aortas and vena cavas.

c. arterioles and venules.

d. atria and ventricles.

6. Red blood cells perform which of the following functions?

a. blood clotting

b. carrying oxygen

c. disease protection

d. wound healing

Answers

1. c. The four-chambered vertebrate heart is made up of the right and left ventricles and the right and left atria. The atria receive blood from the body (the vena cava) and the lungs (the pulmonary vein). The ventricles push blood out of the heart to the body (the aorta) or the lungs (the pulmonary artery).

2. a. Remember that all veins carry blood toward the heart and all arteries carry blood away from the heart. Thus, usually arteries (like the aorta) will be carrying oxygenated blood, and veins (like the vena cava) will be carrying blood that is not oxygenated. However, in the heart-to-lung part of the system, the vessel carrying blood away from the heart and toward the lungs is an artery (the pulmonary artery), but it is carrying blood that is not oxygenated because that's why it's going to the lung (to become oxygenated). Likewise, the vessel carrying blood from the lungs to the heart (the pulmonary vein) is carrying blood that has been oxygenated.

3. b. Blood is a suspension of the fluid we call plasma and the cells that are suspended throughout it. The cells are the red and white blood cells and the platelets.

4. a. Platelets aid in the clotting of blood to seal off a wound and prevent blood loss or infection.

5. c. Capillary beds are between the very small arteries called arterioles and the very small veins called venules. Capillary beds are the site of gas exchange in the circulatory system.

6. b. Red blood cells carry oxygen, but they also carry carbon dioxide.

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