Respiratory 2 Flashcards
gas molecules exert pressure by collisions irregardless of the size. If the partial pressure of oxygen in the blood is lower than the air, what will happen. When will it stop
Diffuse into bloodstream
When equilibrium is reached
When is alveolr pressure equal to atmospheric pressure?
When no air is flowing in/out of lungs
What is the relationship between dissolving and partial pressure?
The higher the PP, the more it will dissolve
What is hypoxia?
Reduced pp O2
What is hypocapnia?
Reduced pp CO2
What is hypercapnia?
Increased PP CO2
Why is alveolar pp O2 lower than air?
Due to mixing with water when inhaled
WHat is perfusion?
Blood supply
What happens if the ventilation to perfusion ratio is mismatched/
full equilibrium cannot be reached
Describe oxygens solubility in plasma
Poor
Describe haemoglobin
Iron ion with 4 haem units and globin chain
What is the purpose of globin?
Prevent oxygen binding being irreversible
What is the oxygen capacity of blood
200 ml per litre
What is cooperative binding?
Binding of O2 to haem group increases affinity until saturation point
When does the oxygen haemoglobin curve shift right?
Increased temperature
CO2
Acidity
DCG