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CAIE A-Level Biology 9.1.5 Airway Secretory and Ciliated Cells

Practise explaining mucus secretion by goblet cells and glands, trapping of particles or pathogens and coordinated ciliary transport towards the throat for removal.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • state that goblet cells and mucous glands secrete mucus onto the airway lining
  • explain trapping of dust and pathogens before they reach delicate alveolar surfaces
  • describe cilia beating towards the throat so contaminated mucus can be removed

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