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NEET 2018 · BiologyPrevious Year Question

Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?

Answer: (C) Inflammation of bronchioles; Decreased respiratory surface. Answer: (c) Inflammation of bronchioles; Decreased respiratory surface Solution: Asthma is difficulty in breathing caused by inflammation of bronchi and bronchioles.

  1. A.Increased respiratory surface; Inflammation of bronchioles
  2. B.Increased number of bronchioles; Increased respiratory surface
  3. C.Inflammation of bronchioles; Decreased respiratory surface✓
  4. D.Decreased respiratory surface; Inflammation of bronchioles

Correct Answer

(C) Inflammation of bronchioles; Decreased respiratory surface

Solution & Explanation

Answer: (c) Inflammation of bronchioles; Decreased respiratory surface Solution: Asthma is difficulty in breathing caused by inflammation of bronchi and bronchioles. Emphysema is a chronic disorder in which alveolar walls are damaged, so the respiratory surface is decreased. Hence asthma = inflammation of bronchioles and emphysema = decreased respiratory surface. NCERT: Ch 14, p.190, line 69 — "alveolar walls are damaged due to which respiratory surface is decreased"

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