What Happens to a Dust Particle That Is Too Small

question 10

Multiple Choice

What happens to a dust particle that is too small to fall from the inspired air and land in the alveoli?

• A) It lands in the respiratory bronchiole, where it is coughed out
• B) It lands in the mucociliary ladder, where type II macrophages phagocytize it.
• C) It is inhaled and then exhaled.
• D) It lands in the bronchi, where it is absorbed.
• E) It lands in the mucociliary ladder, where it is moved to the trachea to be exhaled.

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