Carbon dioxide is more soluble in water than is oxygen. Which gas has the higher rate of diffusion?
A. carbon dioxide
B. oxygen
C. Both will have the same rate of diffusion
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Question 2) Pulmonary edema will cause the rate of gas diffusion to
A. increase.
B. decrease.
C. remain the same.
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Question 3) If the total pressure of a mixture of gases was 760 mm Hg and its composition is 20 oxygen, 0.04 carbon dioxide, 75 nitrogen, and 5 water vapor, then the partial pressure of oxygen would be
A. 740 mm Hg.
B. 20 mm Hg.
C. 148 mm Hg.
D. 152 mm Hg.
E. 200 mm Hg.
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Question 4) Which of the following increases the rate of gas exchange across the respiratory membrane?
A. increased fluid in the alveoli
B. increased thickness of the respiratory membrane
C. increased surface area of the respiratory membrane
D. increased connective tissue in the alveolar wall
E. decreased surface area of the respiratory membrane
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Question 5) Which of the following respiratory membrane layers is closest to air in the alveolus?
A. alveolar epithelium
B. alveolar basement membrane
C. capillary basement membrane
D. capillary endothelium
E. alveolar fluid (with surfactant)
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Question 6) Oxygen and carbon dioxide are exchanged across the respiratory membrane by the process of
A. active transport.
B. diffusion.
C. filtration.
D. osmosis.
E. cotransport.
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Question 7) What is the volume of air that can be forcibly expired after expiration of the tidal volume?
A. residual volume
B. inspiratory reserve volume
C. vital capacity
D. expiratory reserve volume
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Question 8) Physiological dead air space is anatomic dead space plus
A. the residual volume.
B. the volume of any alveoli where gas exchange is diminished.
C. the volume of blood flowing to the lungs.
D. the respiration rate.
E. tidal volume.
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Question 9) Calculate the alveolar ventilation if the tidal volume is 500 ml., the respiratory rate is 12/minute, and the anatomical dead space is 100 ml.
A. 1200 ml
B. 1800 ml
C. 4800 ml
D. 6000 ml
E. 7200 ml
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Question 10) The volume of air inspired or expired with each breath is the
A. residual volume.
B. inspiratory reserve volume.
C. tidal volume.
D. expiratory reserve volume.
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