2. human blood groups

Question 1

the production of antibodies against antigen A and B is by…

Answer 1

intestinal microorganisms whose cell wall antigens are the same as the antigens in the AB0 blood group

Question 2

immunotolerance

Answer 2

the immune system tolerates its own RBC antigen shortly after birth

Question 3

what are the antibodies type IgM?

Answer 3

antibodies against the A and B antigens and cannot go through the placenta

Question 4

what can happen after an incompatible blood transfusion?

Answer 4

intravascular hemolysis- fever, shock, acute uremia or even death

Question 5

what are the genes making the Rh antigens? (3)

Answer 5

C D and E.

if an individual’s genotype has at least one of the C D E antigens= positive Rh

Question 6

what type of antigen is the anti-D

Answer 6

IgG type

Question 7

what happens to an individual which is Rh negative if Rh

positive gets into his blood?

Answer 7

anti-D antigens (IgG type)

Question 8

human blood group types is based on..

Answer 8

hemagglutination: hemagglutinins react with red blood cells that have antigens that the haemagglutinin recognizes. If a reaction takes place, visible clumps form and the surrounding serum becomes clear

Question 9

what can happen if the blood type test takes place at a lower temp. than room temp.?

Answer 9

a non specific “cold agglutination” (even type 0 RBC agglutinate)