5.3 T Cells Flashcards
T lymphocytes are developed in the…
Thymus gland behind the sternum afterwards they move to the lymph nodes
Each T cell has a different…
Receptor which look like antibodies but aren’t called antibodies as they are never released from the plasma membrane
Macrophages display what kind of antigen to T cells?
Viral antigen
Viral antigens are displayed on macrophages to the many different T cells in the…
Lymph nodes
One of the T cells will have the right shape of…
Surface receptor to bind to the right antigen on the macrophage - causes T cell to be stimulated (divides many times to form a clone of cells - clonal selection)
Some T cells from this clone become…
Killer T cella
Killer T cells have surface receptors that are complementary to the antigen this means…
They bind to cells carrying the specific antigen and destroy them
Other cells from this clone develop into…
Helper T cells
Helper T cells produce…
Chemicals that:
- Stimulate macrophages to engulf pathogens by phagocytosis
- stimulate antibody production by B cells
- activate killer T cells
Both killer and helper T cells produce their own type of…
Memory cells - remain in the same blood in case the same antigen invades the body again
