Advertisement Remove all ads

Short Answer Question Write a note on antigens on blood cells. - Biology

Answer in Brief

Short Answer Question

Write a note on antigens on blood cells.

Advertisement Remove all ads

Solution

There are several known antigens on the surface of human red blood cells. These antigens give rise to different blood groups.

ABO Blood Groups:

The A, B, and O blood groups were discovered by Karl Landsteiner in 1900.

He found two antigens or agglutinogens on the surface of human red blood cells and named them as antigen A and antigen B. He also noticed the corresponding antibodies or agglutinins in the serum called ‘a’ and ‘b’.

Blood group Genotype An antigen on the Surface of RBC Antibody in Serum Can donate blood to Can receive blood from

A

IA IA or

IA IO

A Antibody b A, AB A, O
B

IB IB or

IB IO

B Antibody a B, AB B, O
AB (universal acceptor) IA IB A and B Nil AB A, B, AB, O
O (universal donor) IO IO Nil Both Antibody a and Antibody b A, B, AB, O O

In ABO system, the blood groups are determined by the presence or absence of antigen A and antigen B. The blood group of a person is classified into four groups A, B, AB, and O.

Blood group A: Individuals, with blood group ‘A’, has the antigen A on the surface of their red blood cells (RBCs) and antibody ‘b’ in their plasma.

Blood group B: Individuals with blood group ‘B’ have the antigen B on the surface of their RBCs and antibody ‘a’ in their plasma.

Blood group AB: Individuals with blood group ‘AB’ have both antigens A and B on the surface of their RBCs and no antibodies in their plasma.

Blood group O: Individuals with blood group ‘O’ lack both antigens A and B on the surface of their RBCs and show the presence of both ‘a’ and ‘b’ antibodies in their plasma.

Rh factor: Rh – factor is an antigenic protein present on the surface of the red blood cells in human beings.

  Is there an error in this question or solution?
Advertisement Remove all ads

APPEARS IN

Balbharati Biology 12th Standard HSC Maharashtra State Board
Chapter 10 Human Health and Diseases
Exercise | Q 4.05 | Page 245
Advertisement Remove all ads
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×