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ZoologyNEET 2019Regulation and disorders

Breathing and Exchange of Gases

Due to increasing air-borne allergens and pollutants, many people in urban areas suffer from a respiratory disorder causing wheezing, due to:

  1. A.Benign growth on the mucous lining of the nasal cavity
  2. B.Inflammation of the bronchi and bronchioles✓
  3. C.Proliferation of fibrous tissue and damage to the alveolar walls
  4. D.Reduction in the secretion of surfactants by pneumocytes

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