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NCERT Class 11 Biology Chapter 14 Breathing and Exchange of Gases Digital Edition
For Class 11 Biology, this chapter in NCERT Book Class 11 Biology Breathing and Exchange of Gases provides a detailed overview of important concepts. We highly recommend using this text alongside the NCERT Solutions for Class 11 Biology to learn the exercise questions provided at the end of the chapter.
Chapter 14 Breathing and Exchange of Gases NCERT Book Class Class 11 PDF (2025-26)
EXERCISES
1. Define vital capacity. What is its significance?
2. State the volume of air remaining in the lungs after a normal breathing.
3. Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system. Why?
4. What are the major transport mechanisms for CO2? Explain.
5. 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
6. Explain the process of inspiration under normal conditions.
7. How is respiration regulated?
8. What is the effect of pCO2 on oxygen transport?
9. What happens to the respiratory process in a man going up a hill?
10. What is the site of gaseous exchange in an insect?
11. Define oxygen dissociation curve. Can you suggest any reason for its sigmoidal pattern?
12. Have you heard about hypoxia? Try to gather information about it, and discuss with your friends.
13. Distinguish between
(a) IRV and ERV
(b) Inspiratory capacity and Expiratory capacity.
(c) Vital capacity and Total lung capacity.
14. What is Tidal volume? Find out the Tidal volume (approximate value) for a healthy human in an hour.
Please refer to attached file for NCERT Class 11 Biology Breathing and Exchange of Gases
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NCERT Book Class 11 Biology Chapter 14 Breathing and Exchange of Gases
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