Gas laws & gas transfer Flashcards
What is Boyle’s law?
The absolute pressure exerted by a given mass of an ideal gas is inversely proportional to the volume it occupies if the temperature & amount of gas remain unchanged within a closed system
What is Charles’ law?
The volume of a given mass of an ideal gas is directly proportional to its temperature on the absolute temperature scale (in Kelvin) if pressure & the amount of gas remain constant
What is the universal gas law?
Pressure & volume are both proportional to temperature
What is Dalton’s law?
The total pressure exerted by the mixture of non-reactive gases is equal to the sum of the partial pressures of individual gases
What do water molecules exert when entering gas?
Vapour pressure
What is saturated vapour pressure and what does it depend on?
The pressure for water vapour.
Depends on temperature
What is Henry’s law?
At a constant temperature, the amount of a given gas that dissolves in a given type & volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid
When gas molecules enter water, what do they exert?
Tension
What does solubility determine?
The amount of gas to enter liquid & establish particular tension
What are the partial pressures of O2 & CO2 in atmospheric air?
pO2 - 21.1 kPa
pCO2 - minimal
What are the partial pressures of O2 & CO2 in alveolar air?
pO2 - 13.3 kPa
pCO2 - 5.3 kPa
What are the partial pressures of O2 & CO2 in venous blood?
pO2 - 6.0 kPa
pCO2 - 6.5 kPa
What makes up the diffusion barrier for O2 to travel from alveoli into RBC?
- Alveolar wall
- Epithelial cell of alveolus
- Tissue fluid & connective tissue
- Endothelial cell of capillary
- Plasma
- Red cell membrane & cytoplasm
