The human body has physical barriers and chemical defences that protect it from pathogens.
Explain how the skin protects the body from pathogens.
Tears contain lysozymes.
Describe how lysozymes protect the eye from bacteria.
Name the chemical made in the stomach that kills pathogens in food.
Give two physical barriers, other than the skin, that protect the airways from pathogens.
45 exam-style questions on Edexcel GCSE Biology 5.2 Plant and body defences, covering 5.2.1 Physical plant defences, 5.2.2 Chemical plant defences, 5.2.3 Detecting plant diseases, and 5.2.4 Human physical and chemical defences. Each one has a worked solution and a mark scheme showing where the marks go.