IS 6th

Which of the following statements correctly describes Agglutination?

• Agglutinogen is the participating antibody

• Antibodies are made to react with antigens dissolved in solution

• It manifests as clumping of antigen-antibody complexes

• Inert particles utilized include bacteria and RBCs

Which of the following is CORRECT in reporting the strength of agglutination? +

• +4 = One solid aggregate with clear background

• 3 = Medium aggregates in turbid solution

• + +2 = Several small aggregates in turbid solution

• +1 = One solid aggregate with clear background

Which of the following refers to the Zeta Potential?

• Overcome by IgG antibodies

• Net positive charge of cells

• Causes cells to repel each other

• Prevents IgM antibodies from forming a lattice

4. Which of the following statements is TRUE for the Postzone effect?

• Excess antigens

• Excess antibodies

• Produces false positive results

• Antigens and antibodies are in optimum concentration

The following are TRUE for IgG antibodies, EXCEPT?

• Made up of a single structural unit

• Produces strong lattice formation

• An efficient precipitator

• Requires anti-human globulin for lattice formation

The following are used to produce lattice formation with IgG antibodies, EXCEPT?

• Centrifugation

• Heating at 56 degrees centigrade

• Colloidal diluents

• Proteolytic enzymes

7. Which of the following classes of antibodies are known as "Incomplete" antibodies?

• A. IgM

• B. IgG

• C. IgA

• D. Both B and C

ABO blood typing is an example of which of the following major categories of agglutination reactions?

• Direct Immune Agglutination

• Direct Nonimmune Agglutination

• Passive Agglutination

• Reverse Passive Agglutination

Which of the following are utilized in both Passive and Reverse Passive Agglutination?

• Antigen-coated particulate carriers

• Antibody-coated particulate carriers

• Biologic or inert passive carriers

• Anti-human globulin

The following statements correctly describe the Direct Coombs Test, EXCEPT?

• Used to diagnose Hemolytic Anemia

• Uses donor's red cells

• Uses patient's red cells

• Agglutination indicates RBCs were coated with IgG in vivo