23. How you appreciate the mechanism of respiration in our body?

24. Prepare an article on anaerobic respiration to present school symposium.

Prepare a cartoon on discussion between haemoglobin and chlorophyll about respiration.

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1. Exhaled air contains __________ and _______________.

2. A flap like muscular valve controls movement of air and food is _________________.

3. Energy currency of the cell is called ____________.

4. Lenticels are the respiratory organs exists in ___________ part of plant.

5. Mangroove trees respire with their __________.

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6. We will find vocal cords in    ( )

A) larynx     B) pharynx     C) nasal cavity     D) trachea

7. Cluster of air sacs in lungs are called     ( )

A) alveoli     B) bronchi     C) bronchioles     D) air spaces

8. Which of the following is correct     ( )

i) the diaphragm contracts - volume of chest cavity increased

ii) the diaphragm contracts - volume of chest cavity decreased

iii) the diaphragm expands - volume of chest cavity increased

iv) the diaphragm expands - volume of chest cavity decreased

A) i     B) i & ii     C) ii & iii     D) iv

9. Respiration is a catabolic process because of     ( )

A) breakdown of complex food molecules     B) conversion of light energy

C) synthesis of chemical energy     D) energy storage

10. Energy is stored in    ( )

A) nucleus     B) mitochondria     C) ribosomes    D) cell wall



page no:46

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