IMMUNOLOGY

OVERVIEW OF THE IMMUNE SYSTEM

IMMUNITY INNATE AND ADAPTIVE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Under which circumstances will an antigen antibody reaction most likely occur?
A
A person with blood type A is given type O blood.
B
A person with blood type O is given type A blood.
C
A person with blood type AB is given type B blood.
D
A person with blood type AB is given type O blood.
Explanation: 

Detailed explanation-1: -Answer: An antigen-antibody reaction will occur if a person with blood group O is given AB blood. Person with an O blood group does not possess any antigen on the surface of RBCs.

Detailed explanation-2: -blood group A – has A antigens on the red blood cells with anti-B antibodies in the plasma. 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.

Detailed explanation-3: -Type O blood is the absence of both antigen A and antigen B and presence both of anti-A and anti-B antibodies. Type O negative blood also lacks D antigen (rhesus factor/Rh-), and the lack of antigens make it the universal donor.

Detailed explanation-4: -Antibodies in the plasma of donors with different blood types cause a reverse situation. For example, since a person with Type AB blood makes no antibodies against Type A or Type B cells, his or her plasma can be given to a person with Type A, Type B, Type AB, or Type O blood.

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