The table shows one defence that is not working properly in each of four patients. Which patient is least able to destroy pathogens that have already entered the blood?
Table: The defence that is not working properly in each of four patients
| Patient | Defence that is not working properly |
|---|---|
| P | The skin heals very slowly after a cut |
| Q | Very few white blood cells are made |
| R | The stomach produces very little hydrochloric acid |
| S | The cilia in the trachea do not move |
P
Q
R
S
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.