The beating of the cilia of the respiratory passages in the direction of the pharynx forms a(n)
A)debris filter.
B)mucus escalator.
C)respiratory rhythmicity center.
D)sticky surface.
E)increased surface area for gas exchange.

Question

Quizplus · Accepted Answer

The beating of the cilia moves mucus (and trapped debris) up and out of the respiratory passages in the direction of the pharynx, creating a mucus escalator that helps to clear the airways.

The Beating of the Cilia of the Respiratory Passages in the Direction