APII Study Guides
Respiratory Study Guide
Dalton Law of Partial Pressure
The total pressure of a gas mixture is the sum of the pressures exerted by the independent gases.
(ie. Total Pressure = PO2 + P CO2)
(atmospheric pressure= 1 atmosphere = 760 mmHg)
The partial pressure is proportional to its percentage in the total gas mixture.
Pis proportional to gas in mixture
When a mixture of gases is in contact with a liquid each gases will dissolve in the proportion to its partial pressure
It is also dependent on its solubility.
Both gases will move from an area of high concentration to an area of low concentration.
Declining pH (increase acid) results in the increase of O2 unloading.
¯ (low) PO2 of blood, the more room for PCO2
Movement of air is based on:
change in volume a change in pressure a flow of gases