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Antigen Presentation

For questions about infections and immune responses etc, one of the marking points in the mark schemes is always "antigen presentation" but what is it exactly? That the antigen is present :confused:
Reply 1
Avatar for Magician
Magician
15
antigen presentation refers to the macrophage ingesting the cell surface membrane of the pathogen and displaying the antigens of the PATHOGEN on its surface.

It does this so that t-helper cells and b-lymphocytes with complementary shaped antigens can bind to the macrophage (harmless compared with the pathogen). This is known as clonal selection. Then, the t-helper cells release cytokines so that the b-lymphocytes begin dividing and then differentiating into either plasma cells or b-memory cells.

:smile:
Reply 2
Avatar for violet
violet
OP
2
Ooh I see! Thanks! :smile:

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