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Essay Galaxy - B Cells and T Cells B Cells and T Cells

The graph shows the response of the human immune system to the exposure of an antigen in two phases. The first phase is that of a primary response to the initial attack. The second response is very rapid, subsequent to attacks from the same antigen. The specificity of this system relies heavily on two groups of cells: B lymphocytes and T lymphocytes. In period I, the antigen is injected at zero days. This is where the antigen will attach itself to a macrophage. By forty days however, the B cells have made antibodies to protect the body from this foreign substance. Antibodies are complex globular proteins also known as immunoglobulins. They make precise three-dimensional combinations with particular molecules that the body recognizes as foreign. At any given time in t....

Number Of Pages: 2 Number Of Words: 550

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