Damage to the cilia of the airways by smoking leads to
- A. improved filtering of dust
- B. faster removal of mucus
- C. accumulation of mucus and debris, producing the smoker's cough
- D. widening of the trachea
Explanation
Healthy cilia sweep mucus and trapped particles upwards, and when smoke paralyses them the debris collects instead. The cough is the body's substitute for the lost escalator.
Related questions
During swallowing, entry of food into the trachea is prevented by the
The rings of cartilage in the wall of the trachea are C shaped rather than complete because
During inspiration the diaphragm
Quiet expiration at rest is described as a passive process because
The volume of air moved in or out of the lungs during one normal quiet breath is called the