In one lung disease the mucus in the airways is much thicker and stickier than normal. Which is the most likely reason why people with this disease get more lung infections?
Antibodies can no longer reach the cells that line the airways
The cells lining the airways stop producing any mucus at all
The thick mucus traps far fewer pathogens from the air breathed in
The cilia cannot move the thick mucus, so pathogens stay in the lungs
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.