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Chapter 34. Introduction to Pulmonary Structure & Mechanics
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On the summit of Mt. Everest, where the barometric pressure is about 250 mm Hg, the partial pressure of O2 in mm Hg is about
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The forced vital capacity is
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A. the amount of air that normally moves into (or out of) the lungs with each respiration.
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B. the amount of air that enters the lungs but does not participate in gas exchange.
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C. the amount of air expired after maximal expiratory effort.
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D. the largest amount of gas that can be moved into and out of the lungs in 1 min.
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A. the amount of air that normally moves into (or out of) the lungs with each respiration.
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B. the amount of air that enters the lungs but does not participate in gas exchange.
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C. the amount of air expired after maximal expiratory effort.
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D. the amount of gas that can be moved into and out of the lungs in 1 min.
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Which of the following is responsible for the movement of O2 from the alveoli into the blood in the pulmonary capillaries?
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C. Secondary active transport
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A. is increased if the lungs are removed and inflated with saline.
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B. does not affect the work of breathing.
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C. is increased in paraplegic patients.
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D. is increased following bronchial smooth muscle contraction.
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E. makes up 80% of the work of breathing.
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Surfactant lining the alveoli
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A. helps prevent alveolar collapse.
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B. is produced in alveolar type I ...