lec5 : blood groups

Question 1

any substance recognized by the body as

foreign

Answer 1

Antigen

Question 2

Antigen on the surface of RBCs

Answer 2

agglutinogens

Question 3

the most important and best known agglutinogens are the ……………

Answer 3

A and B agglutinogens

Question 4

Antibodies against red cell agglutinogens are called

………………. and they are present in ……………..

Answer 4

agglutinins

plasma

Question 5

Frequency in population of BG A ……….

Answer 5

41%

Question 6

Frequency in population of BG B ……….

Answer 6

10 %

Question 7

Frequency in population of BG AB ……….

Answer 7

4 %

Question 8

Frequency in population of BG O ……….

Answer 8

45 %

Question 9

When A or B antigen meet its corresponding antibody, ……………………………………………………

Answer 9

agglutination reaction occurs.

Question 10

In agglutination reaction , RBC …………………………….

Answer 10

clump and stick to each other then hemolyse

Question 11

WHY The agglutinins attach themselves to the RBCs?

Answer 11

Because agglutinins have many binding sites, a single

agglutinin can attach to different red cells at the same time

Question 12

“Rh‐positive” found in…………………… of population.

Answer 12

85-90%

Question 13

The population are divided according to presence of ………………… into Rh‐positive and Rh‐negative

Answer 13

D‐Antigen

Question 14

Hemolytic disease of the New‐born

Answer 14

Erythroblastosis Fetalis

Question 15

t is a condition due to Rh‐incompatibility between mother and fetus blood

Answer 15

Erythroblastosis Fetalis

Question 16

to prevent sensitization of a Rh‐negative mother,
she is given a single dose of …………………………… in the first……………… after
delivery starting from ………….. delivery

Answer 16

anti‐Rh antibodies (Anti‐D immune globulin)
48 hours
first