The partial pressure of oxygen in the alveoli of the lungs is
equal to that in the blood
more than that in the blood
less than that in the blood
less than that of the carbon dioxide
Alveoli -
Alveoli are the primary sites of exchange of gases.
- wherein
Exchanged in these sites by simple diffusion mainly based on pressure/concentration gradient.
Exchange of gases by simple diffusion based on pressure.
Option 1)
equal to that in the blood
This option is incorrect.
Option 2)
more than that in the blood
This option is correct.
Option 3)
less than that in the blood
This option is incorrect.
Option 4)
less than that of the carbon dioxide
This option is incorrect.