3 What is Y degree of saturation for Mb if pO2 20 Torr Reca

3) What is Y (degree of saturation) for Mb if pO2 = 20 Torr? Recall that P50 for Mb is 2 Torr.

4) Estimate Y for Hb at pO2 = 20 Torr. Assume n(hill) = 2.8 and P50 = 26 Torr

Solution

Degree of Saturation (Y): It is the ratio of the humidity ratio of moist air - to the humidity ratio of saturated moist air at the same temperature and pressure.

a. Degree of Saturation (Y)= po₂ / (po₂ + p₅₀) , Here po₂ = 20 Torr and p₅₀= 2 Torr

= 20 / (20 +2)

= 20/ 22 = 0.90= 90 %

b. Degree of Saturation (Y)= (po₂)ⁿ / (p₅₀)ⁿ + (pO₂)ⁿ, Here po₂= 20 Torr, n= 2.8 and p₅₀= 26 Torr

   ⁼ (20) ^2.8 / (26)^2.8 + (20)^2.8

= 4394.2 / 4394.2 + 9160.6

= 4394.2 / 13554.8

= 0.324 = 32.4 %