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Old 05-27-2012
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Question Exercise and Pa02

On pg 564 FA2012

the 1st graph has Pa02 a little less than normal Pa02

pg. 567 it has no change in Pa02 during exercise... strange

Now I think that they meant to put "strenuous exercise" for the graph on 564. Please correct me if I'm wrong, but I believe strenuous exercise constitutes as a diffusion limited response in that during strenuous ex., the HR and Cardiac Output are increased to the point that the blood (Pa02) spends less time in the capillary and thus has little time to FULLY equilibrate towards normal Pa02.


Am I wrong here? Let me know, THANKS!
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Old 05-29-2012
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bump.. anyone..
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Old 05-29-2012
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All i know for step 1 is that all the changes in exercise happens in the venous.
The arterial doesn't change for exercise.

Strenuous or not, USMLE can shove it lol
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