BIO 10 CHAP 1 MCQ & BLANKS

 

Biology For Class X - Chapter No. 1 - Gaseous Exchange - Multiple Choice Questions And Fill In The Blanks

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CHAPTER 1: GASEOUS EXCHANGE

Multiple Choice Questions And Fill In The Blanks

TEXT BOOK EXERCISE

A. MULTIPLE CHOICE QUESTIONS
Choose the correct answer:
i) The biological functions which perform gaseous exchange:
(a) Photosynthesis
(b) Respiration
(c) Both a and b ✓
(d) Growth

ii) Plants do exchange of gases through:
(a) Roots
(b) Stomata ✓
(c) Stem
(d) All of these

iii) Each stoma is formed by:
(a) one guard cell
(b) two guards cells ✓
(c) three guard cells
(d) four guard cells

iv) Respiratory surface possesses following property:
(a) thin and wet
(b) permeable
(c) very large
(d) all of these ✓

v) Inspiration involves:
(a) Contraction of intercostal muscles
(b) contraction of diaphragm
(c) Inward movement of ribs
(d) Both a and b ✓

vi) Larynx is located on:
(a) Lungs
(b) Trachea ✓
(c) Bronchus
(d) Bronchiole

vii) The respiratory surface of human is:
(a) Nostril
(b) Bronchiole
(c) Alveoli ✓
(d) Trachea

viii) Increase in rate of breathing is due to the following:
(a) increase CO₂ in blood ✓
(b) Increase O₂ in blood
(c) decrease CO₂ in blood
(d) decrease O₂ in blood

ix) Which of the following disorder is associated with degeneration of alveoli?
(a) Bronchitis
(b) Lung cancer
(c) Asthma
(d) Emphysema ✓

x) Which of the following disorder is associated with inflammation of air passage ways?
(a) Bronchitis ✓
(b) Lung cancer
(c) Asthma
(d) Emphysema

Fill In The Blanks:

1. Respiration and photosynthesis require exchange of gases.
2. Respiration takes place in all living organisms.
3. Photosynthesis occurs in green parts of plants.
4. During respiration, oxygen is used and carbon dioxide is given out.
5. In photosynthesis, carbon dioxide is used and oxygen is given out.
6. In terrestrial plants, most of the exchange of gases occurs through minute openings, stomata.
7. The animals use either their body surface, or some internal surface for the exchange of gases.
8. Respiratory surface must be thin, wet, permeable and large in relation to the volume of organism.
9. The respiratory surface of man is alveoli present in lungs.
10. Both lungs have millions of alveoli.
11. Air passage ways lead the atmospheric air to alveoli.
12. Air pollution causes number of respiratory problems.
13. Clean air is essential for better respiratory health.