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Chanchaljeet
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Asked: 2021-02-21T10:46:02+00:00 In:

What will be the pO₂ and pCO₂ in the atmospheric air compared to those in the alveolar air?

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Poll Results

0%(i) pO₂ lesser, pCO₂ higher
87.5% (ii) pO₂ higher, pCO₂ lesser ( 7 voters )
12.5%(iii) pO₂ higher, pCO₂ higher ( 1 voter )
0%(iv) pO₂ lesser, pCO₂ lesser
Based On 8 Votes

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NCERT Solutions for Class 11 Biology Chapter 17 Breathing and Exchange of Gases
Important Board Questions
Breathing and Exchange of Gases
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Question : 5

2020-2021breathing and exchange of gasescbsechapter 17class 11 biologyclass 14 sciencencert
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    1 Answer

    1. (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.

      For more answers visit to website:
      https://www.tiwariacademy.com/ncert-solutions/class-11/biology/chapter-17/

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