At the altitude of 6500 meters, the atmospheric pressure is 347 mmHg. What is the inspired PO2.
73 mm Hg
63 mm Hg
53 mm Hg
83 mm Hg
According to law of paial pressures : Pressure exeed by a gas in a mixture is directly propoional to its concentration in the mixture. In inspired gases; 20 % = O2 78% = N2 PH2O = 47 mmHg (air humidified with inspiration) =347 - 47 = 300 mmHg = gaseous component
Respiratory System Pa 2