Final answer:
A person with 'B' antigens on their red blood cells has type B blood and produces anti-A antibodies. These isohemagglutinins are ready to react if transfused with incompatible blood type A. Type O individuals can donate to any blood type due to their lack of A and B antigens and presence of both antibodies, while AB types can receive any blood.
Step-by-step explanation:
A person with “B” antigens on the surface of their red blood cells has type B blood and produces anti-A antibodies. This is because the immune system creates antibodies against the A antigen, which are not present on the person's own red blood cells.
Individuals with type B blood have B antigens on their red blood cells and do not have A antigens. Therefore, their plasma contains anti-A antibodies. These antibodies are known as isohemagglutinins and they react with A antigens if they are introduced into the body, such as during a transfusion with incompatible blood type A. This immune response prevents individuals from receiving blood from donors with A antigens.
People with blood type O are considered universal donors because they lack both A and B antigens on their erythrocytes and produce both anti-A and anti-B antibodies. Conversely, individuals with blood type AB are universal recipients because they have both A and B antigens on their cells and don't produce anti-A or anti-B antibodies.