Question #6428137Single Choice
Biology
Question
Which of the following is NOT a protective mechanism of the respiratory system?
Options
A
Mucus in the airways traps dust, pathogens, and other particles.
B
Cilia in the respiratory tract move mucus and trapped particles out of the lungs.
C
Alveolar macrophages engulf and digest foreign particles in the alveoli.
D
The diaphragm expels mucus and foreign particles during exhalation.
Answer & Analysis
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