BME365S_Homework4_2011

# D at 264 ft should be 231 ft below the sea surface the

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Unformatted text preview: n nervous system can stand is 1.6 atm. At that point, O2 actually becomes toxic to the human body. Decompression concerns aside, is the diver safe at a depth of 231 ft? Why do you think air tanks for dives below 180 ft contain lower percentages of O2? i. Lung volume = 0.5*surface volume, PN2 = 1.56 atm; PO2 = 0.42 atm ii. Lung volume = (1/3)*surface volume, PN2 = 2.35 atm; PO2 = 0.63 atm iii. Lung volume = (1/4)*surface volume, PN2 = 3.16 atm; PO2 = 0.84 atm iv. Lung volume = (1/8)*surface volume, PN2 = 6.32 atm; PO2 = 1.68 atm; No, the diver is not safe because PO2 > 1.6 atm. The air tanks for deeper depths contain lower concentrations of O2 than atmospheric to prevent oxygen toxicity. 4. (12 points) Divers must be careful when ascending to avoid decompression sickness, also known as the bends. This results from gas, usually N2, coming...
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