The respiratory problem most common in smokers is_________?
Correct answer: B. emphysema
- A. tuberculosis
- B. emphysema
- C. asthma
- D. cancer
Explanation
Long-term smoking commonly causes emphysema, in which alveolar walls are destroyed, reducing respiratory surface area and impairing gas exchange. Cancer is also strongly associated with smoking, but emphysema is the characteristic chronic obstructive respiratory disease intended here.
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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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