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Unit 2-Lecture 3.pptx - Unit 2-Blood Lecture Blood...

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Unit 2-Blood Lecture –Blood Transfusions
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RBC membranes have glycoprotein antigens on their external surfaces These antigens are: Unique to the individual Recognized as foreign if transfused into another individual Promoters of agglutination and are referred to as agglutinogens Presence or absence of these antigens is used to classify blood groups Human Blood Groups
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Humans have 30 varieties of naturally occurring RBC antigens The antigens of the ABO and Rh blood groups cause vigorous transfusion reactions when they are improperly transfused Other blood groups (M, N, Dufy, Kell, and Lewis) are mainly used for legalities Blood Groups
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The ABO blood groups consists of: Two antigens (A and B) on the surface of the RBCs Two antibodies in the plasma (anti-A and anti-B) ABO blood groups may have various types of antigens and preformed antibodies Agglutinogens and their corresponding antibodies cannot be mixed without serious hemolytic reactions ABO Blood Groups
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ABO Blood Groups Table 17.4
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