Teaching MPPSC Assistant Professor Mock Test Series 2025 Life Sciences System Physiology Animal Respiratory system
Even after air has been in our lungs for a while, it never becomes fully deoxygenated. In fact, the oxygen pressure doesn't drop much below 100mmHg. How come the blood cannot extract all the oxygen. Why?
1
The structural change in the hemoglobin do not allow the complete extraction of oxygen
2
Alveoli of the lungs use some amount of oxygen.
3
The plasma oxygen tension reaches equilibrium with the oxygen tension of air.
4
Oxygen is used for cellular respiration by the lungs, so blood plasma cannot utilize the oxygen.