Metaproterenol
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ALLERGIES: THE IMMUNE RESPONSE
The first phase of the immune response occurs when antigens enter the body, usually through the mouth, nose or skin. When this happens, inflammation occurs in the body and the immune system is stimulated to produce more white cells. The task of these extra white cells is to eliminate the offending antigen. If this is successful, the inflammation will subside.
The same process will apply when the body is stressed emotionally or physically. Further stress on the immune system can be caused by an allergic reaction due to the presence in the body of antigens, in the form of allergenic substances.
The second phase of the immune response takes place when the white cells (called leucocytes) are unable to destroy the antigen. The immune system then commences the formation of antibodies, called immunoglobulins, which are tailor-made to combat the antigen and destroy it. Once antibodies have been created to fight a specific antigen, they remain dormant in the body, ready for any future invasion by the antigen. The body now has the capacity to produce more of that antibody, faster, the next time invasion takes place. This is the principle used in immunization and is called Specific Immunity.
Thus, there are two stages to an immune response. The first being, the production of white cells, and the second being, the creation of specific antibodies. Normally, the white cells and the antibodies destroy the antigen and the body makes a speedy recovery. Sometimes however, this does not happen and the result is an allergic reaction which the immune system cannot deal with.
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