Antigens on blood cells.

1.	Antigens on blood cells.
Answer» 1. There are about 30 known antigens on the surface of human red blood cells. They decide the type of blood group such as ABO, Rh, Duffy, Kidd, Lewis, P MNS, Bombay. 2. The different blood groups are determined genetically due to presence of a particular antigen. 3. Landsteiner found two antigens or agglutinogens on the surface of human red blood cells which are named as antigen A and antigen B. 4. There is another antigen called Antigen D which decides the Rh status of the blood. If Antigen D is present, the person is said to be RH positive and when it is lacking, the person is Rh negative. 5. These antigens are responsible for types of blood group and the specific transfusions. 6. Antigens present on the RBCs and antibodies present in the serum can cause agglutination reactions if they are non-compatible. Therefore, at the time of transfusion blood groups are checked properly.

Answer»

1. There are about 30 known antigens on the surface of human red blood cells. They decide the type of blood group such as ABO, Rh, Duffy, Kidd, Lewis, P MNS, Bombay.

2. The different blood groups are determined genetically due to presence of a particular antigen.

3. Landsteiner found two antigens or agglutinogens on the surface of human red blood cells which are named as antigen A and antigen B.

4. There is another antigen called Antigen D which decides the Rh status of the blood. If Antigen D is present, the person is said to be RH positive and when it is lacking, the person is Rh negative.

5. These antigens are responsible for types of blood group and the specific transfusions.

6. Antigens present on the RBCs and antibodies present in the serum can cause agglutination reactions if they are non-compatible. Therefore, at the time of transfusion blood groups are checked properly.

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