Why does cigarette smoking increase the likelihood of developing an asbestos-related illness?

Why does cigarette smoking increase the likelihood of developing an asbestos-related illness?

• A. Paralyzes cilia in the lungs
• B. Increases mucus production in the airways
• C. Decreases overall lung capacity only
• D. Helps clear asbestos fibers from the lungs

Answer: (A)

The main idea is that cigarette smoke cripples the lungs’ defense system for clearing inhaled particles. It damages and paralyzes the cilia that line the airways, so the tiny hairs that normally beat rhythmically to move mucus and trapped particles upward slow down or stop. With this impaired mucociliary clearance, asbestos fibers stay in the lungs longer, causing more irritation, inflammation, and fibrotic changes that raise the risk of asbestos-related illness. Other options aren’t the primary mechanism: increased mucus production happens with smoking, but it doesn’t directly explain how clearance of asbestos fibers is reduced; decreased lung capacity is a consequence of smoking but not the specific reason the risk increases; and claiming smoking helps clear asbestos fibers is incorrect.

The main idea is that cigarette smoke cripples the lungs’ defense system for clearing inhaled particles. It damages and paralyzes the cilia that line the airways, so the tiny hairs that normally beat rhythmically to move mucus and trapped particles upward slow down or stop. With this impaired mucociliary clearance, asbestos fibers stay in the lungs longer, causing more irritation, inflammation, and fibrotic changes that raise the risk of asbestos-related illness.

Other options aren’t the primary mechanism: increased mucus production happens with smoking, but it doesn’t directly explain how clearance of asbestos fibers is reduced; decreased lung capacity is a consequence of smoking but not the specific reason the risk increases; and claiming smoking helps clear asbestos fibers is incorrect.