What will be the pO2 and pCO2 in the atm | Class 11 Biology Chapter Breathing and Exchange of Gasses, Breathing and Exchange of Gasses NCERT Solutions

Question: What will be the pO2 and pCO2 in the atmospheric air compared to those in the alveolar air?
(i) pO2 lesser, pCO2 higher
(ii) pO2 higher, pCO2 lesser
(iii) pO2 higher, pCO2 higher
(iv) pO2 lesser, pCO2 lesser

Answer:

(ii) pO₂ higher, pCO₂ lesser

The partial pressure of oxygen in atmospheric air is higher than that of oxygen in alveolar air. In atmospheric air, pO₂ is about 159 mm Hg. In alveolar air, it is about 104 mm Hg.

The partial pressure of carbon dioxide in atmospheric air is lesser than that of carbon dioxide in alveolar air. In atmospheric air, pCO₂ is about 0.3 mmHg. In alveolar air, it is about 40 mm Hg.

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Comments

Achu
2020-08-26 21:40:07

Very much useful for me

deva
2020-04-04 18:00:09

we breath air from atmosphere so isnt it supposed to be same?

debajitdas
2019-12-09 08:42:17

Nice

Afifa Bano
2019-12-02 06:34:22

Thanks

Arjun goud
2019-04-19 00:49:03

Good

Arjun goud
2019-04-19 00:48:44

Thanks

Hitesh gowda
2018-09-25 06:20:43

Very helpful

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Welcome to the NCERT Solutions for Class 11 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 5: What will be the pO2 and pCO2 in the atmospheric air compared to those in the alveolar air? (i) pO2 ....

What will be the pO2 and pCO2 in the atm | Class 11 Biology Chapter Breathing and Exchange of Gasses, Breathing and Exchange of Gasses NCERT Solutions

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