Part one of term paper
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 l ...

Part two of term paper
... combinations with particular molecules that the body recognizes as foreign. At any given time in the body, there are approximately 2 trillion B cells present. The daughter cells resulting from B cell activation differentiate into two types. One of these types of cells that are being made in period I, is the plasma cell, a specialized antibody factory. It can make up to 30,000 antibodies a second. The second type of cell being made in period I is a memory cell. They also produce ...