Multiple choice

The particles with an aerodynamic diameter of less than 1 µm get deposited in the airways through

  1. sedimentation

  2. impaction

  3. Brownian diffusion

  4. interception

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

For particles with an aerodynamic diameter less than 1 µm, Brownian diffusion is a major way for deposition in airways where the bulk flow is very low or absent.