Solution of Chapter 17. Breathing and Exchange of Gases (Biology NCERT Book)

1 Define vital capacity. What is its significance?view answer >

2 State the volume of air remaining in the lungs after a normal breathing.view answer >

3 Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system. Why?view answer >

4 What are the major transport mechanisms for CO2? Explain.view answer >

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 view answer >

6 Explain the process of inspiration under normal conditions.view answer >

7 How is respiration regulated?view answer >

8 What is the effect of pCO₂ on oxygen transport?view answer >

9 What happens to the respiratory process in a man going up a hill?view answer >

10 What is the site of gaseous exchange in an insect?view answer >

11 Define the oxygen dissociation curve. Can you suggest any reason for its sigmoidal pattern?view answer >

12 Have you heard about hypoxia? Try to gather information about it, and discuss with your friends.view answer >

13 Distinguish between  (a) IRV and ERV(b) Inspiratory capacity and Expiratory capacity.(c) Vital capacity and Total lung capacity. view answer >

14 What is Tidal volume? Find out the Tidal volume (approximate value) for a healthy human in an hour.view answer >