DrVirgo
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108. A medical student whose baseline alveolar PCO2 level is 40 mmHg begins to voluntarily hyperventilate. If his alveolar ventilation triples and his CO2 production remains constant, approximately what would his alveolar PCO2 be?
A. 7 mmHg
B. 13 mmHg
C. 26 mmHg
D. 80 mmHg
E. 120 mmHg
(Please explain how you got the answer)
Thanks.
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| robin082006
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B = 40/3
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| ralux
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PA CO2=Vco2/Va
PAco2=partial pressure of alveolar Co2; Vco2= Co2 production(constant); Va=alveolar ventilation
So PACO2'=Vco2/3Va=PA CO2/3= 40/3
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| DrVirgo
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Thats right. 
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| truedeam59
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Robin
What are you waiting for?
U are so good
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| robin082006
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I plan for 2008 match.
Thanks for your comment.
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