Rh Blood Group System Flashcards
1
Q
- The term “Rh positive” refers to the presence of which
of the following:
a. D
b. E
c. C
d. none of the above
A
a. D
2
Q
- The use of R to denote the presence of “D” in Rh
nomenclature is an example of which terminology?
a. Fisher–Race
b. Wiener
c. ISBT
d. none of the above
A
b. Wiener
3
Q
- True or false? Weak D can result from few D-antigen sites on the red cell or from the presence of Ce allele in trans position to D.
A
True
4
Q
- True or false? For AABB-accredited hospitals, the D type
of units labeled Rh negative must be confirmed from an
integrally attached segment before transfusion, but testing for weak D is not required
A
True
5
Q
- True or false? The E and e alleles are codominant.
A
True
6
Q
- Anti-G will agglutinate which of the following:
a. D-positive red cells
b. C-positive red cells
c. E-positive red cells
d. both a and b
e. both a and c
A
d. both a and b
7
Q
- Which of the following is true regarding Rhnull individuals?
a. their cells lack Rh29
b. their cells lack DCE but have c and e
c. they can form a weak but harmless antibody
d. all of the above
A
a. their cells lack Rh29
8
Q
- True or false? The Rh antibodies do not bind complement except in rare instances
A
True
9
Q
- Which of the following is the most antigenic?
a. D
b. C
c. c
d. E
e. e
A
a. D
10
Q
- HDFN has been dramatically reduced by giving Rh negative women doses of __________.
A
Rh immune globulin
11
Q
Please indicate if the following can result in a false positive (P), a false negative (N), or both depending upon the circumstances (B)
- Contaminated reagent
- Polyagglutinable red cells
- Blocking of antigen sites
- Use of wrong antiserum
- Reagent deterioration
A
- Contaminated reagent => B
- Polyagglutinable red cells => P
- Blocking of antigen sites => N
- Use of wrong antiserum =>B
- Reagent deterioration =>N
