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NCERT solutions Biology Class 11 chapter 17 Breathing and Exchange of Gases


NCERT Biology Class 11

Biology Textbook for Class 11

Chapter 17 - Breathing and Exchange of Gases

Page 277

Define vital capacity. What is its significance?

Q 1 | Page 277

State the volume of air remaining in the lungs after a normal breathing.

Q 2 | Page 277

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

Q 3 | Page 277

What are the major transport mechanisms for CO2? Explain.

Q 4 | Page 277

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

Q 5 | Page 277

Explain the process of inspiration under normal conditions.

Q 6 | Page 277

How is respiration regulated?

Q 7 | Page 277

What is the effect of pCO2 on oxygen transport?

Q 8 | Page 277

What happens to the respiratory process in a man going up a hill?

Q 9 | Page 277

What is the site of gaseous exchange in an insect?

Q 10 | Page 277

Define oxygen dissociation curve. Can you suggest any reason for its sigmoidal pattern?

Q 11 | Page 277

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

Q 12 | Page 277

Distinguish between IRV and ERV

Q 13.1 | Page 277

Distinguish between Inspiratory capacity and expiratory capacity.

Q 13.2 | Page 277

Distinguish between Vital capacity and Total lung capacity

Q 13.3 | Page 277

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

Q 14 | Page 277

NCERT Biology Class 11

Biology Textbook for Class 11