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Blood is grouped according to the kinds of antigens on the surface of red blood cells of an individual - VCE - SSCE Biology - Question 7 - 2003 - Paper 1
Question 7
Blood is grouped according to the kinds of antigens on the surface of red blood cells of an individual. One blood group in humans is the Rhesus blood group. With reg... show full transcript
Worked Solution & Example Answer:Blood is grouped according to the kinds of antigens on the surface of red blood cells of an individual - VCE - SSCE Biology - Question 7 - 2003 - Paper 1
Step 1
7a. The man has made antibodies in response to foreign RBC and these continue to be made (structure 3)
Answer
The man, having been given Rhesus positive blood, will produce antibodies against the Rhesus factor due to the presence of Rhesus positive cells in his system. This immune response leads to the generation of antibodies aimed at destroying the foreign Rhesus positive red blood cells.
Step 2
7a. The antibodies the man has made have destroyed the Rhesus positive cells (structure 2)
Answer
As a result of the immune response initiated by the transfusion of Rhesus positive blood, the antibodies will now be actively targeting and destroying any Rhesus positive red blood cells present in the man’s bloodstream, which could lead to hemolytic reactions.
Step 3
7a. The man continues to make his own cells (structure 1)
Answer
Despite the destruction of the Rhesus positive cells by the antibodies, the man will continue to produce his own red blood cells. This process involves the stem cells in the bone marrow, which are unaffected by the blood transfusion's antibody response.