how are antigens bound
lymphocytes (B and T cells) have receptors that specifically bind. each lymphocyte has receptors w/unique specificity
what happens as lymphocytes mature
self reactive cells will be removed by clonal deletion
how is the lymphocyte selected
by the binding of specific antigen to the lymphocyte receptor. sends a signal inside cell activating it
clonal expansion
production of identical cells. cells will differentiate into effector cells and memory cells
mature lymphocytes
ready to be released into circulation
naive lymphocytes
mature lymphocytes that have not encountered Ag