AP BIOLOGY

THE HUMAN IMMUNE SYSTEM

BLOOD GROUPS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Agglutination occurs when blood type antibodies come into contact with blood type antigens to which they correspond. What is agglutination?
A
Red blood cells burst and die
B
Red blood cells are clumped together and become non-functional
C
Antibodies bind to the antigens and then render the red blood cell non-functional
D
A system in which transfusions can occur
Explanation: 

Detailed explanation-1: -Agglutination is the process that occurs if an antigen is mixed with its corresponding antibody called isoagglutinin. This term is commonly used in blood grouping. This occurs in biology in two main examples: The clumping of cells such as bacteria or red blood cells in the presence of an antibody or complement.

Detailed explanation-2: -Agglutination occurs when antibodies on one RBC bind to antigen on other RBCs, forming globular to amorphous, grapelike aggregates of RBCs. When present, RBC agglutination is supportive of immune-mediated hemolytic anemia (IMHA).

Detailed explanation-3: -Agglutination occurred when the RBC antigens were bound by the antibodies in the serum. He called the antigens A and B, and depending upon which antigen the RBC expressed, blood either belonged to blood group A or blood group B.

Detailed explanation-4: -For instance, if an individual’s blood sample is agglutinated by the anti-A antibody, but not the anti-B antibody, it means that the A antigen is present but not the B antigen. Therefore, the blood type is A.

There is 1 question to complete.