Spec 1BI0
Revise Edexcel GCSE Biology 5.3 Immune system and medicines with the question bank, lessons, revision guides, and flashcards.
Explain the role of the specific immune system of the human body in defence against disease, including: a exposure to pathogen • b the antigens trigger an immune response which causes the production of antibodies • c the antigens also trigger production of memory lymphocytes • d the role of memory lymphocytes in the secondary response to the antigen
