Which of the following is not an infection of the lungs/respiratory tract?
Correct answer: C. Cystic Fibrosis
- A. Histoplasmosis
- B. Tuberculosis
- C. Cystic Fibrosis
- D. Pneumonia
Explanation
The correct answer is Cystic Fibrosis. Unlike histoplasmosis, tuberculosis, and pneumonia, which are infections caused by a fungus, bacteria, and various pathogens respectively, cystic fibrosis is a genetic disorder. It affects the respiratory system but is not caused by an infectious agent. This distinguishes it from the other options, which are all infections of the lungs or respiratory tract.
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About Respiration
The human respiratory system includes the air passages, lungs, alveoli and breathing muscles, while gaseous exchange explains how oxygen enters blood and carbon dioxide leaves it by diffusion. The effects of smoking include damage to cilia and alveoli, reduced gas exchange, chronic bronchitis, emphysema and increased risk of lung cancer.
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