Which of the following conditions would DECREASE diffusion due to an INCREASE in the diffusion DISTANCE? Emphysema Pulmonary Edema Asthma Did I say Asthma? Because that NOT the answer
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Hubert A.
The main mechanism of hypoxemia in severe asthma is: A. Difficult diffusion of gases through the accumulating intra-alveolar fluid. B. Reduced lung compliance caused by the development of pulmonary congestion. C. Substantial destruction of the alveolar wall due to hyperinflation. D. Good ventilation of poorly perfused alveoli. E. Decreased V/Q ratio due to perfusion of poorly ventilated alveoli.
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According to Fick's Law, an increase in which of the following will decrease gas exchange rates between pulmonary capillary blood and the alveoli? a. Increased diffusion distances the gases have to travel between blood and alveolar gas b. Increased difference in partial pressure for the gas (e.g. oxygen or carbon dioxide) between blood and alveolar space c. Increased area of alveoli and blood vessels available for diffusion d. All of the above e. None of the above
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