E in emphysema lung elasticity is greatly reduced

E. In emphysema, lung elasticity is greatly reduced. This leads to a decrease in lung recoil
but an increase in FRC volume.
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2. Multiple Choice (20 points, 4 points each)
Read each question carefully and write the most appropriate answer in the space provided
___a ___ A. The diffusion pathway for any gas passing through the lung alveoli into the
blood, or vice versa, includes all of the following EXCEPT:
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a. contains macrophages that protect the body from foreign particulates
through phagocytosis
b. contributes to oxygen and carbon dioxide gas exchange with the
pulmonary vasculature
c. the airways progressively decrease in size, but the length:diameter ratio
remains ~3 to maintain a constant resistance
d. the airways progressively decrease in size, but the volumetric flow rate in
each airway remains a constant value throughout the lung
e. none of the above
C. Which answer is ALWAYS true for an air/water interface that has reached an
equilibrium, or steady, state:
___e ___ B. Which is true of the branching airway system of the lungs:

___b ___ E. The total lung diffusing capacity (D
L
) for oxygen and carbon dioxide BOTH
depend on all of the following EXCEPT:
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