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Resp CV - Chapter 441

Resp CV - Chapter 441 - Big Picture O2 and CO2 have...

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Click to edit Master subtitle style 4/7/11 Big Picture O2 and CO2 have different physical properties in both air and H2O Diffusion is the final step in gas exchange. Human lung ventilation is due to negative pressure. Lung ventilation is controlled by pH changes due to CO2 build up.
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4/7/11 Climbing Mt. Everest Sea Level: 21% O2 9800 ft: 2/3 of sea level O2 20,000 ft: 1/2 of sea level O2 29,041 ft (peak): 1/3 of sea level O2 “I am nothing more than a single narrow gasping lung, floating over the mists and summits.” - Reinhold Messner first ascent without supplemental O2, 1978
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4/7/11 Respiratory Physiology at Summit Ventilation is 5-6x greater than normal Maximal oxygen consumption = to a slow walk
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4/7/11 Symptoms of Severe Acute Mountain Sickness Shortness of Breath (at rest) Decreasing mental status Inability to walk Fluid Build up in the lungs (pulmonary edema) Fluid around the brain (cerebral edema)
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4/7/11 Bar Headed Goose Migrates over the Himalayas - 33,000 ft
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Click to edit Master subtitle style 4/7/11 Gas Exchange and Circulation Why is gas exchange important?
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