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) smooth slick surface allowing particles to slide.
E) increased surface area for gas exchange.

Question

Quizplus · Accepted Answer

The beating of the cilia in the respiratory passages in the direction of the pharynx creates a "mucus escalator" that helps to clear mucus and debris from the airways.

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