What is the primary mechanism for deposition of large, high-mass particles (>5 µm) in the respir-atory tract?
a. Inertial impaction
b. Sedimentation
c. Diffusion
d. Brownian motion
ANS: A
Inertial impaction occurs when suspended particles in motion collide with and are deposited on a surface. This is the primary deposition mechanism for particles larger than 5 µm.
Health Professions
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