1) What differentiates between an artery and a vein? a) Concentration of oxygen in the blood b) Location in the body c) Direction of blood transport d) Concentration of carbon dioxide in the blood 2) Why do arteries have a thick muscular wall? a) To generate high blood pressure b) To maintain high blood pressure c) To withstand high blood pressure 3) Why do arteries have thick elastic walls? a) To generate high blood pressure b) To maintain high blood pressure c) To withstand high blood pressure 4) Select all feature(s) that are important for the functioning of veins. a) Presence of semilunar valves b) Muscular walls of the vein c) Wide lumen d) Skeletal muscles around the vein 5) Arrange arteries, veins, and capillaries in order of decreasing blood pressure. a) Arteries, veins, capillaries b) Arteries, capillaries, veins c) Veins, capillaries, arteries d) Capillaries, arteries, veins 6) What is NOT an adaptation of blood capillaries for its function as the site of exchange of substances. a) One-cell thick wall (endothelium) b) Wide lumen c) Highly branched 7) Select all substances that are NOT exchanged between blood and tissue fluids in blood capillaries. a) Oxygen b) Carbon dioxide c) Glucose d) Red blood cells e) Proteins f) Water

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