Question

How much partial pressure (in mm Hg) of Oâ‚‚ in alveoli ?
(a) 159
(b) 104
(c) 40
(d) 45

Answer 1

The answer is 40mm Hg.I hope it helps.

Answer 2

Answer:

100 mmHg.

Explanation:

We know that the from the inspired air only 21% oxygen and the atmospheric pressure is 760 mmHg. While when the air is inhaled and it travels through the esophagus then bronchi then to the alveoli the partial pressure of the oxygen inside the walls of the alveoli is 100 mmHg while the partial pressure of the carbon dioxide in the same place is 40 mmHg.

This happens due to the added water vapors and the carbon dioxide also which reduces the partial pressure of the oxygen.