Selina ICSE Solutions for Class 9 Biology Chapter 14 - The Respiratory System Exercise 1 A. Multiple Choice Type 1. During inspiration, the diaphragm (a) relaxes (b) contracts (c) expands (d) gets folded 2. The ultimate end parts of the respiratory system in humans are known as (a) alveoli (b) bronchioles (c) tracheoles (d) bronchi 3. During respiration there is (a) gain in dry weight (b) loss in dry weight (c) no change in dry weight (d) increase in the overall weight Solution A.1. 1. (b) contracts 2. (a) alveoli 3. (b) loss in dry weight B. Very Short Type 1. Choose the odd one out in each of the following groups of four items each: (a) Trachea, Bronchus, Alveolus, Diaphragm (b) Ethyl alcohol, Carbon dioxide, Starch, Oxygen (c) Diffusion, Respiratory gases, Alveoli, Capillary network (d) Trachea, Ciliated epithelium, Mucous, Diffusion (e)Oxyhaemoglobin, Carbaminohaemoglobin, Hypoxia, Carboxyhaemoglobin (f) Hairy, Moist...
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