CHAPTER 6 THE ABO BLOOD GROUP SYSTEM
UPDATED ACTUAL QUESTIONS WITH CORRECT
ANSWERS
Question 1.
Anti-A from a group B individual is primarily what class of immunoglobulin?
ANSWER
IgM
Question 2.
Cord blood was sent to the laboratory for blood type determination on twins A and B. Baby A
demonstrated mixed-field reactions with anti-A and anti-AB and no reactivity with anti-B.
Reverse grouping was not performed. Baby B showed a 1+ reaction with anti-A and anti-AB.
What could be the reason for the variable reactions?
ANSWER
All of the above Chimerism A dimorphic cell population Dispermy
Question 3.
Which of the following criteria is used to classify the B subgroups?
ANSWER
All of the above Agglutination patterns with anti-B, anti-AB, and anti-H Presence of ABH isoagglutinins
in serum Absorption studies with anti-B
Question 4.
Approximately how many antigen sites exist on a type-A1 individual's RBC?
ANSWER
1 million
Question 5.
What substances are found in a group A secretor?
ANSWER
AH
Question 6.
Where are ABH substances detected in secretors?
ANSWER
All of the above Tears Saliva Milk
1
, Question 7.
ies within the ABO system?
ANSWER
tivate complement
Question 8.
A group O person with warm autoimmune hemolytic anemia may demonstrate weak reactions
in the forward grouping due to:
ANSWER
Red blood cells being coated with antibody
Question 9.
What is a lectin?
ANSWER
Seed extracts that agglutinate human cells with moderate specificity
Question 10.
What ABO group contains the least amount of H substance?
ANSWER
A1B
Question 11.
What testing is available that will differentiate between a true B and an acquire B?
ANSWER
All of the above Anti-B lectin Acidification of anti-B reagent Secretor studies
Question 12.
What is the source of anti-A1 lectin?
ANSWER
Dolichos biflorus
Question 13.
Secretor studies were performed on a person who expressed weak reactions in forward
grouping. Only B and H substance were present in the saliva. What is this person's ABO group?
ANSWER
B
2
UPDATED ACTUAL QUESTIONS WITH CORRECT
ANSWERS
Question 1.
Anti-A from a group B individual is primarily what class of immunoglobulin?
ANSWER
IgM
Question 2.
Cord blood was sent to the laboratory for blood type determination on twins A and B. Baby A
demonstrated mixed-field reactions with anti-A and anti-AB and no reactivity with anti-B.
Reverse grouping was not performed. Baby B showed a 1+ reaction with anti-A and anti-AB.
What could be the reason for the variable reactions?
ANSWER
All of the above Chimerism A dimorphic cell population Dispermy
Question 3.
Which of the following criteria is used to classify the B subgroups?
ANSWER
All of the above Agglutination patterns with anti-B, anti-AB, and anti-H Presence of ABH isoagglutinins
in serum Absorption studies with anti-B
Question 4.
Approximately how many antigen sites exist on a type-A1 individual's RBC?
ANSWER
1 million
Question 5.
What substances are found in a group A secretor?
ANSWER
AH
Question 6.
Where are ABH substances detected in secretors?
ANSWER
All of the above Tears Saliva Milk
1
, Question 7.
ies within the ABO system?
ANSWER
tivate complement
Question 8.
A group O person with warm autoimmune hemolytic anemia may demonstrate weak reactions
in the forward grouping due to:
ANSWER
Red blood cells being coated with antibody
Question 9.
What is a lectin?
ANSWER
Seed extracts that agglutinate human cells with moderate specificity
Question 10.
What ABO group contains the least amount of H substance?
ANSWER
A1B
Question 11.
What testing is available that will differentiate between a true B and an acquire B?
ANSWER
All of the above Anti-B lectin Acidification of anti-B reagent Secretor studies
Question 12.
What is the source of anti-A1 lectin?
ANSWER
Dolichos biflorus
Question 13.
Secretor studies were performed on a person who expressed weak reactions in forward
grouping. Only B and H substance were present in the saliva. What is this person's ABO group?
ANSWER
B
2
