TNCC FINAL EXAM 2 QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+
Of the red cells listed, which has the most D antigen present?
a. Rh null
b. Dce/Dce
c. dce/dce
d. D--/D—
Correct answer-d. D--/D--
Which of the following is true of the Duffy blood group system?
a. Enzymes enhance the Duffy antigens
b. Antibodies never show dosage
c. Fya and Fyb are codominant alleles
d. The majority of whites are Fy (a-b-)
Correct answer-c. Fya and Fyb are codominant alleles
Which antibody is typically considered to be an auto-antibody if found in the plasma of
an adult?
a. Anti-K
b. Anti-I
c. Anti-D
d. Anti-Fya
Correct answer- b. Anti-I
Which is true of antibodies to the Kidd blood group system antigens?
a. They are enhanced by enzymes
b. They quickly drop below detection limits
c. They are high titer low avidity (HTLA) antibodies
, TNCC FINAL EXAM 2 QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+
d. They can be neutralized with urine
- Correct answer- b. They quickly drop below detection limits
Which of the following is true of the Lewis system?
a. Lewis antigens are found on type II precursor chains
b. Lewis antigens are well developed at birth
c. Antibodies to Lewis antigens always cause HTRs
d. Antibodies to Lewis antigens rarely cross the placenta
- Correct answer- d. Antibodies to Lewis antigens rarely cross the placenta
Which of the following is true of antibodies to MNS blood group system antigens?
a. Anti-U is directed at a high-incidence antigen
b. Anti-N is commonly found
c. Anti-M is always clinically significant
d. Anti-S is reactive with enzyme-treated cells
- Correct answer- a. Anti-U is directed at a high-incidence antigen
Which of the following antibodies is classified as a "biphasic" auto-antibody?
a. Anti-B
b. Anti-P
c. Anti-H
d. Anti-Lea
- Correct answer- b. Anti-P
, TNCC FINAL EXAM 2 QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+
You have performed an antibody screen using the tube method. All three screening
cells test negative. The check cells in all three tubes are also nonreactive. What should
you do?
a. Re-spin the tubes and reread them
b. Report the antibody screen as negative
c. Repeat the antibody screen with new reagent
d. Perform an antibody identification panel
- Correct answer- c. Repeat the antibody screen with new reagent
A patient has a currently nonreactive antibody screen but has a history of anti-Jka in
their patient file. Which type of crossmatch must be performed on this patient?
a. Immediate spin crossmatch
b. IAT crossmatch
c. Electronic crossmatch
d. DAT crossmatch
- Correct answer- b. IAT crossmatch
Which antibody can be neutralized with a reagent made from plasma?
a. Anti-D
b. Anti-Jka
c. Anti-M
d. Anti-Lea
- Correct answer- d. Anti-Lea
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+
Of the red cells listed, which has the most D antigen present?
a. Rh null
b. Dce/Dce
c. dce/dce
d. D--/D—
Correct answer-d. D--/D--
Which of the following is true of the Duffy blood group system?
a. Enzymes enhance the Duffy antigens
b. Antibodies never show dosage
c. Fya and Fyb are codominant alleles
d. The majority of whites are Fy (a-b-)
Correct answer-c. Fya and Fyb are codominant alleles
Which antibody is typically considered to be an auto-antibody if found in the plasma of
an adult?
a. Anti-K
b. Anti-I
c. Anti-D
d. Anti-Fya
Correct answer- b. Anti-I
Which is true of antibodies to the Kidd blood group system antigens?
a. They are enhanced by enzymes
b. They quickly drop below detection limits
c. They are high titer low avidity (HTLA) antibodies
, TNCC FINAL EXAM 2 QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+
d. They can be neutralized with urine
- Correct answer- b. They quickly drop below detection limits
Which of the following is true of the Lewis system?
a. Lewis antigens are found on type II precursor chains
b. Lewis antigens are well developed at birth
c. Antibodies to Lewis antigens always cause HTRs
d. Antibodies to Lewis antigens rarely cross the placenta
- Correct answer- d. Antibodies to Lewis antigens rarely cross the placenta
Which of the following is true of antibodies to MNS blood group system antigens?
a. Anti-U is directed at a high-incidence antigen
b. Anti-N is commonly found
c. Anti-M is always clinically significant
d. Anti-S is reactive with enzyme-treated cells
- Correct answer- a. Anti-U is directed at a high-incidence antigen
Which of the following antibodies is classified as a "biphasic" auto-antibody?
a. Anti-B
b. Anti-P
c. Anti-H
d. Anti-Lea
- Correct answer- b. Anti-P
, TNCC FINAL EXAM 2 QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+
You have performed an antibody screen using the tube method. All three screening
cells test negative. The check cells in all three tubes are also nonreactive. What should
you do?
a. Re-spin the tubes and reread them
b. Report the antibody screen as negative
c. Repeat the antibody screen with new reagent
d. Perform an antibody identification panel
- Correct answer- c. Repeat the antibody screen with new reagent
A patient has a currently nonreactive antibody screen but has a history of anti-Jka in
their patient file. Which type of crossmatch must be performed on this patient?
a. Immediate spin crossmatch
b. IAT crossmatch
c. Electronic crossmatch
d. DAT crossmatch
- Correct answer- b. IAT crossmatch
Which antibody can be neutralized with a reagent made from plasma?
a. Anti-D
b. Anti-Jka
c. Anti-M
d. Anti-Lea
- Correct answer- d. Anti-Lea
