The most important cause of many of the respiratory disorders is:
Correct answer: C. Smoking
- A. Bacterial infection
- B. Pollution
- C. Smoking
- D. Drinking
- E. Radiations
Explanation
Smoking is the most important cause of many respiratory disorders, including chronic bronchitis, emphysema, and lung cancer. Tobacco smoke contains harmful chemicals that damage the respiratory system and increase the risk of developing these diseases.
This question appeared on the NUMS 2019 (cancelled sitting) paper, which you can sit online with every answer explained.
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About Effects of Smoking
Smoking exposes the respiratory system to nicotine, tar and carbon monoxide, damaging cilia, reducing oxygen transport and narrowing or inflaming airways. The topic covers dependence, chronic bronchitis, emphysema, lung cancer and cardiovascular effects, while separating short-term physiological changes from long-term disease.
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