Zusammenfassung der Ressource
Gas Exchange and Transport
- Resting Oxy consumption=250mL min-1
- Produce 200mL min-1 of CO2
- Direction of exchange of Oxy
- Lungs, 02 diffuse from alveoli to capillary blood
- Systemic cap beds, 02 from blood to cells via interstitial fluid
- C02 opp direction
- Dalton's Law
- Total P= P1+P2+P3 etc ( total of all gases in same vol)
- Alveolar Air
- Atmospheric air inhaled...
- saturated with water vapour
- mix with air with high CO2 in resp' dead space
- Higher PCO2 + lower P02 than atmo air
- Rate of gas diffusion
- Directly proportional to
- conc grad across memb
- surf area of memb
- Permeabilty of memb to the gas
- Inversely prop to
- thickness of memb