Multiple choice

The mucous membrane produces a sticky substance called _____ that helps in trapping the dust particles.

  1. fungus

  2. bronchus

  3. mucus

  4. alveoli

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

Mucus is a sticky secretion produced by the mucous membranes in the respiratory tract, which traps dust, pollen, and other particles to keep the airways clean.