CAIE IGCSE Biology 11.1.11 Goblet Cells, Mucus & Cilia
Practise explaining how mucus and ciliated cells protect lungs from inhaled particles and pathogens.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- state that goblet cells secrete sticky mucus which traps dust particles and pathogens
- explain that cilia beat to move contaminated mucus away from alveolar gas exchange surfaces
- link unusually thick mucus to narrowed airways, poorer ventilation and reduced exercise performance
11.1.11—Role of goblet cells, mucus question 1
[Maximum number: 1]
A scientist measured the number of dust particles in inspired air and in expired air.
They found fewer dust particles in expired air.
Suggest a reason for their observation.
any one from:
trapped in nose hairs ;
trapped in mucus ;
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