The table describes three defences that act on a pathogen breathed in through the nose. In which order do these three defences act?
Table: Three defences that act on a pathogen breathed in through the nose
| Defence | What the defence does |
|---|---|
| 1 | Hydrochloric acid kills the pathogen |
| 2 | Cilia waft the mucus to the throat |
| 3 | Mucus traps the pathogen |
1, 3, 2
2, 3, 1
3, 1, 2
3, 2, 1
176 exam-style questions on AQA GCSE Biology 3.1 Communicable diseases, covering 3.1.1 Communicable (infectious) diseases, 3.1.2 Viral diseases, 3.1.3 Bacterial diseases, 3.1.4 Fungal diseases, 3.1.5 Protist diseases, 3.1.6 Human defence systems, 3.1.7 Vaccination, 3.1.8 Antibiotics and painkillers, and 3.1.9 Discovery and development of drugs. Each one has a worked solution and a mark scheme showing where the marks go.