CBSE Class 11 Biology Breathing And Exchange of Gases Worksheet Set B

TOPIC :BREATHING AND EXCHANGE OF GASES

1. Identify the types of respiratory organs in the following organisms.
a) Earthworms
b) Insects
c) Terrestrial organisms

2.Food or water does not normally enter the respiratory passage. Give reason.

3.Write the function of pleural fluid.

4.Why does exchange of gases continue to occur in the lungs even if you hold your breath for 30 seconds.

5.Explain how the process of inspiration take place.

6.Define the following:
a) Tidal volume
b) Residual volume
c) Vital capacity
d) Total lung capacity

7.What is partial pressure? Write down the partial pressure of oxygen and carbon dioxide at different parts involved in diffusion in comparison to those in atmosphere.

8.With help of a labeled diagram explain the structure of alveolus.

9.What is oxygen dissociation curve? Write its significance.

10.List the factors facilitating the formation of oxyhaemoglobin.

11.Explain how the transport of oxygen occurs?

12.Write the major transport mechanisms of carbon dioxide in our body.

13.How is respiration regulated in our body?

14.What are occupational respiratory disorders?

15.“Cigarette smoking is injurious to health”. Justify by giving an example of disease caused due to smoking.

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