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Immune System Cells. Unit 5-5 Notes Mr. Hefti – Pulaski Biology. Blood Review. Immune response steps…. Antigen triggers IR Macrophage “swallows” pathogen Helper T and B cells activated Antibodies bind to antigen marking cell for destruction Cytotoxic T destroys marked cells.
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Immune System Cells Unit 5-5 Notes Mr. Hefti – Pulaski Biology
Immune response steps… • Antigen triggers IR • Macrophage “swallows” pathogen • Helper T and B cells activated • Antibodies bind to antigen marking cell for destruction • Cytotoxic T destroys marked cells
Virus Viral antigen Macrophage Viral antigen Refer to Tiger p. 936 to label! Helper T cell B cell Receptor proteins Cytotoxic T cell Plasma cell Infected body cells Viral antigen Antibodies Antibody Receptor protein Viruses
How do vaccines work? • Immune system exposed to weakened or harmless version of pathogen • Antibody production stimulated prior to actual exposure • BBC video clip