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
heart chamber that receives blood from the venae cavae is the a. | left
atrium. | c. | left
ventricle. | b. | right atrium. | d. | right ventricle. | | | | |
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3.
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The
pacemaker responsible for starting a heartbeat a. | is located in the brain. | b. | squeezes the
ventricles shut. | c. | is a small bundle of cells at the entrance to the right
atrium. | d. | is in the aorta. | | |
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4.
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Normal blood measure in millimeters of mercury is a. | 145/95. | c. | 120/80. | b. | 130/100. | d. | 100/50. | | | | |
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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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