Ptotal = sum of partial pressures.
755 = pN2 + pH2O + pCO2 + pO2
Substitute the numbers and solve for pO2 in mm Hg.
Post your work if you get stuck.
What is the partial pressure of O2 in the lungs if the atmospheric pressure (total pressure) is 755mmHG, the PN2 is 561mmHg, PCO2 is 0.29mmHg, and PH2O in the lungs is 41mmHg?
3 answers
So, am I adding all of them and then divided by 755?
No.
755 = 561 + 41 + 0.29 + pO2
Solve for pO2 of substitute X for pO2 and solve for X
755 = 561 + 41 + 0.29 + pO2
Solve for pO2 of substitute X for pO2 and solve for X