Ared cell membrane
Bserum
Cplasma
Dnone of these
Answer:
A. red cell membrane
Read Explanation:
Location of Blood Group Antigens
Blood group antigens (agglutinogens) are specific glycoproteins or glycolipids found on the surface of Red Blood Cells (RBCs), also known as erythrocytes.
These antigens are genetically determined and serve as the basis for the ABO blood group system and the Rh (Rhesus) factor system.
Key Characteristics
ABO System: Individuals have either 'A' antigens, 'B' antigens, both (AB), or neither (O) on the membrane of their RBCs.
Rh Factor: The presence or absence of the 'D' antigen on the RBC surface determines if an individual is Rh-positive (Rh+) or Rh-negative (Rh-).
Immune Response: The presence of these antigens on RBCs allows the immune system to recognize cells as 'self'. If blood containing foreign antigens is introduced (e.g., via transfusion), the body's plasma antibodies (agglutinins) will attack the foreign RBCs, leading to agglutination (clumping).