Exam 6: The Abo Blood Group System

An elderly patient is documented as being type O. The forward grouping is negative with anti-A and anti-B. The reverse grouping shows no reactivity with A₁ cells and B cells. What can be done to correct the discrepancy?

What does the hh genotype refer to?

All of the following are technical errors that could result in ABO discrepancies except:

A₁ lectin agglutinates:

What percentage of the type-A population are A₁?

All of the following statements are true concerning ABH soluble substances except:

Which of the following indicates secretor gene control overproduction of H substance?

Serum from a group B individual contains anti-A. When A₂ cells are added to serum and centrifuged, the cells with attached anti-A are removed from serum. What is the name of this technique?

Antibody titers specific to antigens from the ABO system are typically highest:

Weak agglutination with anti-A typing sera is to be expected with which of the following blood groups?

Mixed-field agglutination encountered in ABO forward grouping may be caused by:

All of the following is true regarding formation of the ABH antigens except:

All of the following may depress antigen expression except:

What substances are found in a group A secretor?

What percentage of individuals inherit the secretor gene?

Persons who inherit the h allele do not produce _______________transferase necessary for formation of the H structure.

Anti-A from a group B individual is primarily what class of immunoglobulin?

All of the following are tests performed in the blood bank to classify subgroups of A except:

What ABO group contains the least amount of H substance?

What is a lectin?