Circulation

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1. Fibrinogen is

A blood protein that escorts lipids through the circulatory system.

A cell fragment involved in the blood-clotting mechanism.

A blood protein that is converted to fibrin to form a blood clot.

A leukocyte involved in trapping viruses and bacteria.

About This Quiz

This quiz covers our lesson over circulation.

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2. Most mollusks and arthropods, including insects,

Have a closed circulatory system.

Have an open circulatory system.

Have no interstitial fluid.

Have no cardiovascular system.

3. In a system with double circulation,

Blood is pumped at two separate locations as it circulates through the body.

There is a countercurrent exchange within the gills.

Hemolymph circulates both through a pumping blood vessel and through body sinuses.

Blood is pumped to the gas-exchange organ and returning blood is then pumped through systemic vessels.

4. Breathing rate will increase when _ CO₂ in your blood causes a in pH.

Increased, rise

Increased, drop

Decreased, rise

Decreased, drop

5. In countercurrent exchange,

Double circulation keeps oxygenated and deoxygenated blood separate.

The capillaries of the lung pick up more oxygen than do tissue capillaries.

6. Blood returning to the mammalian heart in a pulmonary vein drains first into the

Vena cava.

Left atrium.

Right atrium.

Left ventricle.

Right ventricle.

7. How are arteries and veins different?

An artery has a thicker muscular and connective tissue layer than does a vein.

Veins do not have valves and arteries do.

Blood is under lower pressure in arteries than in veins.

Arteries carry blood to the heart; veins carry blood away from the heart.

Blood in arteries is oxygen rich; blood in veins is always oxygen poor.

8. Systolic blood pressure is maintained by the

Left atrium.

Right atrium.

Left ventricle.

Right ventricle.

Semilunar valves in the aorta.

9. Which of the following would normally contain blood with the least amount of oxygen?

The left ventricle

The left atrium

The pulmonary veins

The pulmonary arteries

Capillaries that line the small intestine

10. Which of the following is not a similarity between open and closed circulatory systems?

Some sort of pumping device helps to move blood through the body.

Some of the circulation of blood is a result of movements of the body.

The blood and interstitial fluid are distinguishable from each other.

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