Immunity-antibodies and Antigen
There are two different responses produced by the immune response in mammals. There is the "Cell mediated" response, and there is the "antibody response". First we shall deal with the Cell mediated response. This response is based upon the help of T-Cells. There are various types of T-cells which all have different jobs in the system. The cell mediated response is mainly utilised in defence against intracellular pathogens, such as viri and funghi(and some bacteria). The T-cell precursors are produced in the bone marrow. They move along to the Thymus and become developed T-Cells. T-Cells have a life span of about 5-10 years. T-Cells provide cell mediated immunity. The cell mediated immune system has delayed hypersensitivity, meaning that it takes time for it to get a job done. T-cells are split into two groupes, phagocytes and lymphocytes. Immuno surveilance is also taken care of by these. Such as if "bad cells", such as
There exists 4 different types of blood groups. There is A,B,AB and O. There are 3 genes involved, O,A and B antigen. Group O has no antigen in red blood cells, A has A antigen, B has B antigen and AB has both A and B antigen. The different antigens can not be mixed. If they are we are confronted with a Graft vs Host reaction. An immune response occurs and the graft will be distroyed if possible, under any circumstances a reaction occurs which can be fatal if a lot of blood of the wrong kind is, e.g., transfused(the blood precipitates). This is a humoral response.The antigen of the graft will be recognised and rejected by the bodys immune system. The ABO markers can be found on most body cells, e.g. in saliva, gastric juice etc. Tissue in the body also has antigen on it. Therefore when foreign tissue enters a body it will trigger a cell mediated response in order to terminate the foreign tissue. When an organ is to be trans
Some common words found in the essay are:
T-Cells T-Cells, , cell mediated, organ transplanted, mediated response, cell mediated response, immune system, antigen tissue, foreign tissue, immune response, antibody response, response mainly, antigen organ,
Approximate Word count = 628
Approximate Pages = 3 (250 words per page double spaced)
|
