IMMUNOLOGY

Detailed explanation-1: -The ABO system blood group B – has B antigens with anti-A antibodies in the plasma. blood group O – has no antigens, but both anti-A and anti-B antibodies in the plasma. blood group AB – has both A and B antigens, but no antibodies.

Detailed explanation-2: -People with type A blood will react against type B or type AB blood. People with type B blood will react against type A or type AB blood. People with type O blood will react against type A, type B, or type AB blood. People with type AB blood will not react against type A, type B, type AB, or type O blood.

Detailed explanation-3: -Human blood of AB group does not contain antibodies to erythrocyte antigens of other blood groups. This determines natural resistance of people to many infectious diseases whose agents have antigens on the surface of their cells that are similar to antigens of one or another group of blood.

Detailed explanation-4: -Of course, ABO antibodies in blood groups A and B are primarily IgM, and they react very well at body temperature and are highly significant.

Detailed explanation-5: -The antigens present on our own red blood cells in our own body are termed self-antigens and do not generate an antibody response. Therefore, the answer is a. Important self-antigens on the surface of red blood cells are the A and B antigens of the ABO blood system.

Detailed explanation-6: -Less than 1% of the U.S. population have AB negative blood, making it the least common blood type among Americans. Patients with AB negative blood type can receive red blood cells from all negative blood types.