physio respiratory mini control

questions:
1. blood oxigen capacity
2. content of air in atmostphere
3. purpose of ventilation
4. content of alveoli gas
5. draw oxigen-haemoglobin saturation disassociation graph
6. diff forms of transport of CO2 and O2 in blood
7. func of carbonic anhydrase
8. partial pressure of O2 in our cells

my answers:
1. 10-20ml per 100ml blood
2. O2 : CO2 : N2 : H2O :: 20.87% : 0.03% : 78.6 : 0.5
3. no idea, figure out urself >,<"! just crap something lar.
4. O2 : CO2 : N2 : H2O :: 13.5% : 5.3% : 74.9% : 6.3%
5. uhm, its the bloody sigmoid thing.. saturation % vs oxigen pressure graph
curve goes left if temp down, presure down, ph up.
curve goes right if temp up, pressure up, ph down
6. transport of O2
1.5% in plasma
98.5% in hb-o2 [ in rbc]

transport of Co2
7% in plasma
23% in hb-co2 [in rbc]
70% in form of HCO3

7. function of carbonic anhydrase
IN RBC, it catalyses the binding of H2O with CO2 and forms H2CO3.
H2CO3 is then converted into HCO3.
HCO3 then goes into the venous blood.
H+ from H2CO3 goes to dispose other Hb-O2 and makes it Hb-H. The O2 goes into the tissues.

8. according to lecture it is
Po2 = 10
Pco2 = 60

according to my reference it is
Po2 = 40
Pco2 = 45

bie bie ..gluck

reference for answers are mostly lecture of last week.