Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to
Answer: (B) inflammation of bronchi and bronchioles. Answer: (b) inflammation of bronchi and bronchioles Solution: Wheezing triggered by allergens and pollutants is the classic sign of asthma, which NCERT defines as difficulty in breathing causing wheezing due to inflammation of bronchi and bronchioles.
- A.benign growth on mucous lining of nasal cavity
- B.inflammation of bronchi and bronchioles✓
- C.proliferation of fibrous tissues and damage of the alveolar walls
- D.reduction in the secretion of surfactants by pneumocytes.
Correct Answer
(B) inflammation of bronchi and bronchioles
Solution & Explanation
Answer: (b) inflammation of bronchi and bronchioles Solution: Wheezing triggered by allergens and pollutants is the classic sign of asthma, which NCERT defines as difficulty in breathing causing wheezing due to inflammation of bronchi and bronchioles. Option (c) describes fibrosis/emphysema and (a) describes nasal polyps, neither of which causes allergen-induced wheezing. NCERT: Ch 14, p.190, line 67 — "causing wheezing due to inflammation of bronchi and bronchioles"