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The partial pressure of oxygen in the alveoli of the lungs is

Option: 1

equal to that in the blood


Option: 2

more than that in the blood


Option: 3

less than that in the blood


Option: 4

less than that of the carbon dioxide


Answers (1)

best_answer

Alveoli are the site of gaseous exchange and have a higher partial pressure of oxygen than that of blood. Blood is rich in carbon dioxide at cell and tissue level due to cellular respiration. The higher partial pressure of oxygen in alveoli allow diffusion of oxygen into the blood. 

Hence the correct answer is 'more than that in the blood'

Posted by

Gautam harsolia

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