Antigen recognition by T lymphocytes - Antigen processing and presentation (T helper cell activation

4 important questions on Antigen recognition by T lymphocytes - Antigen processing and presentation (T helper cell activation

What does antigen source dictates?

- T cell response needed
- Processing route
- Antigen presenting molecule

Which cells are APC?

The ones who can phagocytose those are the Dendritic cells and the Macrophages and the B cells.
Important neutrophils are not APC

The CD4 co-receptor is expressed by ... And binds to .....

T helper cells and MHC class II
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Why do only antigen presenting cells APC express MHC II?

Only APC can efficiently phagocytose extracellular antigens

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