Breathing and exchange gases

Download  as PDF.

NCERT Class 11 Biology Chapter wise Solutions

UNIT I:  DIVERSITY IN THE LIVING WORLD

• 1 : The Living World
• 2 : Biological Classification
• 3 : Plant Kingdom
• 4 : Animal Kingdom

UNIT II: STRUCTURAL ORGANISATION IN PLANTS AND ANIMALS

• 5 : Morphology of Flowering Plants
• 6 : Anatomy of Flowering Plants
• 7 : Structural Organisation in Animals

UNIT III: CELL: STRUCTURE AND FUNCTIONS

• 8 : Cell : The Unit of Life
• 9 : Biomolecules
• 10 : Cell Cycle and Cell Division

UNIT IV: PLANT PHYSIOLOGY

• 11 : Transport in Plants
• 12 : Mineral Nutrition
• 13 : Photosynthesis in Higher Plants
• 14 : Respiration in Plants
• 15 : Plant Growth and Development

UNIT V: HUMAN PHYSIOLOGY

• 16 : Digestion and Absorption
• 17 : Breathing and Exchange of Gases
• 18 : Body Fluids and Circulation
• 19 : Excretory Products and their Elimination
• 20 : Locomotion and Movement
• 21 : Neural Control and Coordination
• 22 : Chemical Coordination and Integration

NCERT Solutions For Class 11 Biology Chapter 17 Breathing and exchange gases

• 17.1 Respiratory Organs
• 17.2 Mechanism of Breathing
• 17.3 Exchange of Gases
• 17.4 Transport of Gases
• 17.5 Regulation of Respiration
• 17.6 Disorders of Respiratory System

NCERT Solutions For Class 11 Biology Breathing and exchange gases

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 $CO_2$? 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.