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 the body, there are approximately 2 trillion B ....

Number Of Pages: 2

Number Of Words: 550

Got a term paper due soon and need some help quick? You have come to the right place. Essay Galaxy has over 50,000 essays, papers, and reports available for download right now! Get ideas from thousands students just like you to help make that essay perfect. Don't hesitate. Join today and get instant access to our enormous database.

Membership Options Price Savings   1 month subscription    $19.95 recurring * 3 months subscription    $39.95 recurring $19.90 6 months subscription    $69.95 non-recurring $49.75