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