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 has a much thicker muscle layer than does a. | a vein. | c. | a venule. | b. | a
capillary. | d. | All of the
above | | | | |
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2.
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The
smallest and most numerous blood vessels in the body are the a. | venules. | c. | arteries. | b. | veins. | d. | capillaries. | | | | |
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3.
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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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4.
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Refer
to the illustration above. The cells shown a. | can live for at least a year. | b. | are the largest
cells in the circulatory system. | c. | promote clotting. | d. | contain
hemoglobin. | | |
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5.
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The
pressure exerted on the inner walls of the arteries when the heart relaxes between beats is the ____
pressure. a. | systolic. | c. | barometric. | b. | diastolic. | d. | residual. | | | | |
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