Immune System

Ch. 21 Immune System

Remember…there are several types of immune cells:

The pathogen binds to the macrophage, which adapts to the pathogen. The pathogen is broken down in the phagocytic lysosome, and the macrophage presents the newly made pathogen components to the T-lymphocyte. The T-lymphocyte is activated and becomes a  Killer cell or a B-lymphocyte. The B-lymphocyte might proliferate and its plasma cells produce specific antibodies or it does not and memory cells induce a secondary response to a pathogen that has already been introduced. Killer cells help the macrophage phagocytize and digest. 

*See the concept map from previous study!

This diagram shows the different stages of becoming specialized lymphocytes, starting at the stem cell level. Eosinophils, basophils and neutrophils are all granulocytes

B-lymphocytes become plasma cells

Monocytes become macrophages

Erythroblasts are precursors to RBC’s

Megakaryocytes become thrombocytes which are platelets.