Which statement best describes the primary route of asbestos-related health problems?

• A. Inhalation of fibers into the lower lung area
• B. Ingestion of asbestos fibers
• C. Skin contact with asbestos
• D. Exposure to ultraviolet light

Answer: (A)

Asbestos-related health problems arise mainly from inhalation of fibers that reach the lower parts of the lungs. When fibers are breathed in, they can settle in the bronchioles and alveoli, where they persist for years, triggering ongoing inflammation and scarring (asbestosis) and increasing the risk of lung cancer and mesothelioma. Ingestion of fibers is not the primary pathway and the gastrointestinal tract does not absorb them effectively, while skin contact or UV exposure do not drive the classic asbestos diseases. So inhaling fibers into the lower lung area is the key route leading to these health effects.