The nurse is teaching a patient about the antigen-antibody response. Which statement best describes an antigen?
1. Antigens are recognized by the body as foreign or non-self.
2. The presence of HLA antigens means that the recipient cannot receive an organ.
3. A recipient may have antihuman antigens that would react with a donated organ.
4. An organ can only be transplanted if the potential donor and recipient antigens completely match.
1
Rationale 1: Antigens are recognized by the body as foreign or non-self.
Rationale 2: HLA antigens found on chromosome 6 helps the immune system determine what tissue is foreign and what is self.
Rationale 3: A recipient may have antihuman antibodies (not antigens) that would react with a donated organ.
Rationale 4: A complete match is rare, and could only occur with identical twins.
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