Cambridge IGCSE Biology
10.1Diseases and immunity
Diseases and immunity in Cambridge IGCSE Biology: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic57 practice questions3 lessons
Overview
Active and passive immunity, vaccination and cholera are Supplement.
Learning objectives
What the syllabus expects you to be able to do.
- 10.1.1Describe a pathogen and a transmissible disease, and state how pathogens are transmitted directly and indirectly.
- 10.1.2Describe the body's defences: skin, hairs in the nose, mucus, stomach acid and white blood cells.
- 10.1.3Explain how a clean water supply, hygienic food preparation, good personal hygiene, waste disposal and sewage treatment control the spread of disease.
- 10.1.4Supplement: describe active immunity, antigens and antibodies, and outline how vaccination gives long-term immunity through memory cells and controls the spread of disease.
- 10.1.5Supplement: explain passive immunity, including antibodies passed across the placenta and in breast milk, and state that it produces no memory cells.
- 10.1.6Supplement: describe cholera as a bacterial disease spread in contaminated water and explain how its toxin causes diarrhoea, dehydration and loss of ions.
Lessons
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Cholera
19 min
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Immunity and vaccination
24 min
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Pathogens, transmission and disease control
20 min
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Sample question
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