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CBSE - Class 11 Biology Breathing and Exchange of Gases Worksheet

1.
What is Tidal volume? Find out the Tidal volume (approximate value) for a healthy human in an hour.
2.
Define vital capacity. What is its significance?
3.
Define oxygen dissociation curve. Can you suggest any reason for its sigmoidal pattern?
4.
What is the site of gaseous exchange in an insect?
5.
Distinguish between (a) IRV and ERV
6.
What will be the $pO_2$ and $pCO_2$ in the atmospheric air compared to those in the alveolar air ?
a. $pO_2$ lesser, $pCO_2$ higher b. $pO_2$ higher, $pCO_2$ lesser c. $pO_2$ higher, $pCO_2$ higher d. $pO_2$ lesser, $pCO_2$ lesser
7.
Explain the process of inspiration under normal conditions.
8.
Have you heard about hypoxia? Try to gather information about it, and discuss with your friends.
9.
Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system. Why?
10.
What is the effect of $pCO_2$ on oxygen transport?
11.
State the volume of air remaining in the lungs after a normal breathing.
12.
What happens to the respiratory process in a man going up a hill?
13.
How is respiration regulated?
14.
What are the major transport mechanisms for $CO_2$? Explain.
15.
Distinguish between (b) Inspiratory capacity and Expiratory capacity.
16.
Distinguish between (c) Vital capacity and Total lung capacity.

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6.
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