Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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An
artery a. | usually carries
oxygen-rich blood. | b. | has thin, slightly elastic walls. | c. | has valves that
prevent blood from flowing backward. | d. | All of the above | | |
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2.
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If a
blood vessel has valves, it probably is a(n) a. | vein. | c. | venule. | b. | artery. | d. | capillary. | | | | |
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3.
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Mature red blood cells a. | can live for about a year. | c. | promote clotting. | b. | are the largest
cells in the blood. | d. | do not have a
nucleus. | | | | |
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4.
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Red
blood cells a. | transport
respiratory gases. | c. | destroy
viruses. | b. | combat bacterial infection. | d. | transport cholesterol. | | | | |
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5.
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cholesterol buildup : atherosclerosis :: a. | iron buildup :
atherosclerosis | b. | arteriosclerosis : the heart to work more
easily | c. | low intake of saturated fats : heart
attacks | d. | atherosclerosis : heart attacks | | |
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