2490389
Questão 1
Questão
Which one of the following is NOT true about Kell system antibodies
Responda
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Usually clinically significant IgG antibodies
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Best detected in indirect antiglobulin tests
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Fail to react in enzyme tests
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Do not activate complement
Questão 2
Questão
Antibodies to the Kell, Kidd and Duffy systems all share the following traits except
Responda
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Can cause haemolytic disease of the newborn and foetus
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Enhanced with enzyme treatment
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Can cause haemolytic transfusion reactions
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usually detected only by indirect antiglobulin test
Questão 3
Questão
Which of the following phenotypes is heterozygous
Responda
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Fy(a-b+)
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Jk(a+b+)
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Lu(a-b-)HIV
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Jk(a-b+)
Questão 4
Questão
Which of the antibodies from the following blood group systems shows a dosage effect?
Responda
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Lutheran
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Kell
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Duffy
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P
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Lewis
Questão 5
Questão
Antibodies to k antigen are not commonly detected in transfusion screening because
Responda
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k antigen is of high incidence
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the antibodies do not cause transfusion reactions
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antibodies best react at 4 degree (C)
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The antigen is of low incidence
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k antigen is not present on screening cells
Questão 6
Questão
Lewis system antibodies have not been implicated in haemolytic disease of the new born and foetus because
Responda
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the antigens are not fully developed at birth
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Lewis system antibodies do not cross the placenta
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the antibodies are not clinically significant
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the antigens are primarily plasma based
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All of the above
Questão 7
Questão
The Donath-Landsteiner antibody is
Responda
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an IgG auto anti-P
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an IgM auto anti-P
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an IgM auto anti-I
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anti-IH that reacts at cold temperatures
Questão 8
Questão
Which of the following cells has the highest concentration of M antigens
Responda
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MNSs
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MNs
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NSs
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MSs
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NS
Questão 9
Questão
Which of the following does not result in an Lu(a-b-) phenotype
Responda
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Deletion of the genes on the Lu locus
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Amorphic genes of the Lu locus
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Delayed anamestic heamolytic transfusion reaction
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A suppressor gene on the X-chromosome
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An inhibitor gene on another locus
Questão 10
Questão
The top and bottom pack comprises of
Responda
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Single packs joined together
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Triple pack
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Double pack
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Quadruple pack
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