Exam (elaborations)
Blood Bank Review Questions with correct answers
- Course
- Institution
Blood Bank Review Questions with correct answers
[Show more]
Seller
Follow
EXAMQA
Reviews received
Content preview
Blood Bank ReviewDescribe antigen development in a newborn - CORRECT ANSWER-ABO
antigens are weaker in cord blood samples and may result in weaker ABO
phenotyping reactions.
Antigen development slowly occurs until the full expression of adult levels is
reached at about 2 to 4 years of age.
Sugar for H angtigen - CORRECT ANSWER-L-fucose
Genetic control of A and B antigens is mapped to chromosome ___ - CORRECT
ANSWER-9
H antigens by phenotype (highest to lowest concentration - CORRECT
ANSWER-O>A2>B>A2B>A1>A1B
Which phenotype possesses the lowest number of unconverted H sites -
CORRECT ANSWER-Group A1B
The anti-A1 lectin is______ in the routine ABO testing of donors and recipients
because it is unnecessary to distinguish between the A1 and A2 phenotypes for
transfusion purposes. - CORRECT ANSWER-not used
Adsorption - CORRECT ANSWER-immunohematologic technique that uses red
cells (known antigens) to remove red cell antibodies from a solution (plasma or
antisera); group A red cells can remove anti-A from solution.
Elution - CORRECT ANSWER-process that dissociates antigen-antibody
complexes on red cells; freed IgG antibody is tested for specificity.
Ulex europaeus - CORRECT ANSWER-Plant lectin with specificity for the H
antigen
ABO antibodies are not detected in the serum of newborns until they are _____ -
CORRECT ANSWER-3 to 6 months of age
, Maximal ABO titers have been reported in children from __________ -
CORRECT ANSWER-5 to 10 years of age.
The anti-A produced in group B individuals and the anti-B produced in group A
individuals contain primarily antibodies of the ___ - CORRECT
ANSWER-immunoglobulin M (IgM) immunoglobulin class along with small
amounts of IgG.
Anti-A and anti-B antibodies found in the serum of group O individuals are
composed - CORRECT ANSWER-primarily of IgG class.
Anti-A1 becomes a concern when it causes problems with ABO phenotyping
results and incompatible crossmatches on immediate spin. - CORRECT
ANSWER-...
Red cell suspensions prepared from patient samples can be washed three times
before repeated testing - CORRECT ANSWER-...
Daily quality control on ABO typing reagents is satisfactory - CORRECT
ANSWER-...
Acquired B phenotype - CORRECT ANSWER-group A1 individual with disease
of the lower gastrointestinal tract, cancer of the colon and rectum, intestinal
obstruction, or gram-negative septicemia who acquires reactivity with anti-B
reagents in ABO red cell testing and appears as group AB.
B(A) phenotype - CORRECT ANSWER-group B individual who acquires
reactivity with anti-A reagents in ABO red cell testing; in these individuals the B
gene transfers trace amounts of the immunodominant sugar for the A antigen
and the immunodominant sugar for the B antigen
Acquired B phenotype - CORRECT ANSWER-1. The agglutination of the
patient's red cells with anti-A is strong (4+).
2. The agglutination of the patient's red cells with anti-B is weaker (1+) than
usually expected (3+ to 4+). These red cells react as the phenotype group AB.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller EXAMQA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79271 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now