Tetanus is caused by a bacterium that releases a toxin. The toxin damages nerve cells and can kill. The bacterium usually enters the body through a deep cut in the skin.
Explain why a deep cut increases the risk of tetanus.
A patient with tetanus is given an injection containing antitoxins. Explain how the antitoxins help the patient.
The injection of antitoxins does not destroy the tetanus bacteria. Explain why the patient's own white blood cells are still needed.
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.