10-24-07 - BIO 311D WBCs Macrophages-big eater 10/24/2007...

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BIO 311D 24/10/2007 09:06:00 WBCs Macrophages—big eater o WBCs that both destroy invading microbes and help alert other  immune cells by secretion of interleukin-1 (chemical regulator) B-cells—lymphocytes that produce antibodies; when stimulated, certain of  their daughter cells (plasma cells) secrete large quantities of antibodies into  the blood stream o Memory b-cells—lone lived and provide future immunity o Plasma cells—secrete antibodies—circulate (2,000-30,000  AB/cell/second); 5-17 days delay. T-cells—a set of lymphocytes that regulate the immune response or kill  certain types of cells o Cytotoxic T-cells—destroy foreign cells, infected own body cells, or  cancerous body cells; attack foreign antigen displayed with MHC-1. Rejection of tissue and organ transplantation o Helper T-cells—stimulate immune responses (secrete interleukin-2) by  both B-cells and killer T-cells
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10-24-07 - BIO 311D WBCs Macrophages-big eater 10/24/2007...

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