Elastic fibres in the alveoli

  1. keep bronchi open
  2. trap bacteria
  3. recoil during expiration to help push air out
  4. produce mucus
Answer

C) recoil during expiration to help push air out

Stretch and recoil aids expiration. AS & A Level Biology · Topic 9 Gas Exchange · 9.1 The gas exchange system

Biology MCQ · More A Level Biology: Gas exchange MCQs · Practise