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Biology - Exemplar

17. Breathing and Exchange of Gases

1. The Living World
2. Biological Classification
3. Plant Kingdom
4. Animal Kingdom
5. Morphology of Flowering Plants
6. Anatomy of Flowering Plants
7. Structural Organisation in Animals
8. Cell : The Unit of Life
9. Biomolecules
10. Cell Cycle and Cell Division
11. Transport in Plants
12. Mineral Nutrition
13. Photosynthesis in Higher Plants
14. Respiration in Plants
15. Plant Growth and Development
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
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Long Answer Type

Q. 44.8( 5 Votes )

Cigarette smoking

Class 11th Biology - Exemplar 17. Breathing and Exchange of Gases

Answer :

Emphysema is a disorder in which the alveoli wall gets damaged.Excessive cigarette smoking leads to Emphysema due to the presence of various harmful chemicals like nicotine, tar, sulphur etc. Which causes damage to the alveoli wall and also decreases elasticity of the bronchioles and alveoli.

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