| Term 
 
        | Blood types and transfusion compatibility are based on the interactions between these two things |  | Definition 
 
        | Plasma proteins Erythrocytes
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        | Term 
 
        | The two types of large molecules that interact to determine blood tpye |  | Definition 
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 | Definition 
 
        | On the surface of the cell - allow the body to distinguish itself from foreign matter |  | 
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 | Definition 
 
        | Proteins that bind to antigens and mark them, or cells bearing them, for destruction |  | 
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 | Definition 
 
        | The clumping of particles - eg when two antibody molecule binds two or more antigen molecules |  | 
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        | Term 
 
        | The purpose of an antigen-antibody complex - formed through agglutination |  | Definition 
 
        | To immobilise antigens until immune cells arrive |  | 
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        | Term 
 
        | Antigens that determine blood types |  | Definition 
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        | Term 
 
        | Antibodies that determine blood types |  | Definition 
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        | Term 
 
        | Where agglutinogens are found |  | Definition 
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        | Term 
 
        | Where agglutinins are found |  | Definition 
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        | Term 
 
        | The number of molecule binding sites to attach to either A or B antigen |  | Definition 
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        | Term 
 
        | The most common blood type |  | Definition 
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        | Term 
 | Definition 
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        | Term 
 
        | This blood type is called the "universal recipient" - wont agglutinate donor RBCs of any ABO blood type |  | Definition 
 
        | AB - lacks both anti-A and anti-B antibodies |  | 
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        | Term 
 
        | This blood type os called the "universal donor" |  | Definition 
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        | Term 
 
        | A person is Rh-positive if they have this type of antigen |  | Definition 
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        | Term 
 
        | A person is Rh-negative if they lack this type of antigen |  | Definition 
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        | Term 
 
        | Why anti-D antibodies are not normally present in the blood |  | Definition 
 
        | They only form in Rh- people exposed to Rh+ blood |  | 
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        | Term 
 
        | Is there a little or high risk if an Rh- person receives Rh+ donor blood |  | Definition 
 
        | Little - anti-D does not appear instantaneously - but could make a problem is exposed to Rh+ blood again later |  | 
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