Phagocytes Engulf Pathogen
1. Engulfs pathogen
2. Traps it in a phagocytic vacuole
3. Fuses with lysosomes which release lysozymes, these break down the pathogens
4. Presents the antigens
Phagocytes Activate T-Cells
Has proteins on its surface that bind to the antigens presented to it by the phagocytes
This activates the T-Cells
1. Some release substances to activate B-Cells
2. Some attach to antigens and kill the cell
T-Cells Activate B-Cells which divide into Plasma Cells
1. Antibody-Antigen complex forms
2. Activates B-Cells together with substances released from T-Cells
3. Activated B-Cells divide into plasma cells
Plasma Cells make more Antibodies to a Specific Antigen
1. Coat pathogen to make it easier for phagocyte to engulf
2. Coat pathogen to prevent it entering host cell
3. Binding and neutralising pathogen
Cellular and Humoral
Cellular = T-Cells and other cells they interact with e.g. phagocytes
Humoral = B-Cells and the production of antibodies
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