Biology 0610 · IGCSE · Diseases and immunity

Diseases and immunity — practice question

The body has several kinds of defence against pathogens. Which defences stop pathogens from reaching the alveoli when air is breathed in?

  • A1, 2, and 3
  • B2, 3, and 4
  • C2 and 3 only
  • D2 only

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