Clonal selection/ Humoral response

bacterium w antigens on surface

antigen binds w B cell with complimentary receptor

B cell becomes APC = T helper cells bind to complimentary receptors on APC to produce n release cytokines that stimulate B cell

B cell divides to give B memory and B effector cells

Clone of B memory cells

Clone of B effector cells

differentiate into plasma cells

plasma cells secrete antibodies which bind them to antigens - identifies them for easier destruction

cytokines are like chemical 'alarm bells'