BRAINCAKEPartial Pressure of Oxygen
The partial pressure of a gas is the pressure that the gas would exert if it alone occupied the whole volume of a mixture. It is a measure of how much of that gas is present, and is measured in kilopascals (kPa). The partial pressure of oxygen is written pO2.
In a gas mixture, the partial pressure of each gas is proportional to the fraction of the mixture that it makes up:
pO2 = fraction of oxygen × total pressure
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All 32 lessons in Transport in Animals · All OCR AS-level Biology topics