secondary response
What secondary response means in Biology A-Level, as defined for AQA, OCR.
Definitions of secondary response
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Reference: AQA
On second exposure to the same antigen, memory B cells divide rapidly into plasma cells, producing antibody faster, at a higher concentration and for longer, so symptoms do not appear.
On later exposure to the same antigen, memory B and T cells respond quickly, so this response is faster, larger and longer-lasting, with a higher antibody concentration.
On later exposure, memory B cells divide rapidly into plasma cells and produce a fast, large response, so the person does not develop symptoms.
Topics that use secondary response
- Cell recognition and the immune system (AQA A-Level)
- Communicable diseases, disease prevention and the immune system (OCR A-Level)
Related terms
- active immunity
- agglutination
- passive immunity
- Active immunity and memory cells
- Animal and recombinant sources
- Animal communicable diseases
- animal use in production and testing
- antibody
Using secondary response in the exam
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