Understanding Antigens
Part of Adaptive Immunity and Antibodies — GCSE Biology
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 3 of 18 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 3 of 18
Practice
20 questions
Recall
25 flashcards
Understanding Antigens
Antigens are foreign substances that can trigger an immune response. The term comes from "antibody generator" - literally, substances that generate antibodies.
Types of Antigens:
- Pathogens: Bacteria, viruses, fungi, parasites
- Toxins: Poisonous substances from bacteria or plants
- Foreign cells: Blood transfusions, organ transplants
- Allergens: Pollen, dust mites, certain foods
Antigen Recognition: Each antigen has unique molecular shapes called epitopes. These are like molecular fingerprints that immune cells can recognize and bind to specifically.