Understanding Antigens
Part of Adaptive Immunity and Antibodies · GCSE GCSE Biology revision
This deep dive covers Understanding Antigens within Adaptive Immunity and Antibodies for GCSE Biology. Specific immune responses, antibody production, lymphocytes, memory cells It is section 2 of 15 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 2 of 15
Practice
23 questions
Recall
12 flashcards
Understanding Antigens
Antigens are foreign substances that can trigger an immune response. The term comes from "antibody generator" — literally, substances that generate antibodies.
Examples of antigens:
- Pathogens: Bacteria, viruses, fungi, parasites all carry antigens on their surfaces
- Toxins: Poisonous substances released by bacteria
- Abnormal cells: Cancer cells may display abnormal antigens
Each antigen has a unique molecular shape on the surface of the pathogen. White blood cells recognise this specific shape and mount a targeted response.
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Read this section alongside the surrounding pages in Adaptive Immunity and Antibodies. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Adaptive Immunity and Antibodies
What are antigens?
Explain how lymphocytes produce antibodies to destroy a specific pathogen.
Quick Recall Flashcards
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