SME
Microbiology · Problem type
The adaptive immune response in order
Use this for “Which cells act, and in what order, from antigen presentation to memory?”
Explore
Presented antigen switches on helper T cells, which drive both arms: antibodies from B cells and killing by CD8 T cells.
Assumptions
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Each B or T cell carries one receptor; only the few that fit this antigen are chosen.
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MHC class II shows antigen to CD4 helper T cells; MHC class I shows it to CD8 killer T cells.
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A first response takes about one to two weeks; memory cells shorten the next one.
Topic check
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