Write 3-4 lines about Memory T-cell and Helper T-cell.
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They are Different kind of White Cells which helps the human body to fight against pathogens
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Memory T-cell:- These cells don not kill the pathogens and also don't form the antibodies but these cells helps in retaining the memory of every encounter. They convert into effector cells on later encounter with specific antigen even after several years.
Helper T-cell:- This activated helper cell stimulates the killer T-cell and B-cell and these killer T-cell and B-cell start dividing and produce clone that is group of similar cells and this phenomenon is known as clonal selection. Lymphokines are produced in this which cause accumulation of WBCs to the affected side.
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