Question

1. What determines blood type?

2. What type of blood antigens are expressed if a person is blood type AB negative?

3. Why doesn’t a transfusion reaction occur the first time an Rh negative patient is exposed to Rh positive blood?

Answer 1

1.Determination of blood type:

& Blood types are detamined by presence of paticular antigens or absence on The sudan red blood cells A+, A, B+, B, or ot, ABA, AB & Rh tyre .

2. Type of blood antigen in AB negative patient:

. * If peason AB- Blood. The antigen Expressed on 2 the blood cell are both A and B. P at Blood type Name Indicates antigens are expressed on The Blood cell tone ok But No antigen present in Blood will, so no antibodies is plasme

3.transfusion reaction not occur in The negative patient exposed to Rh positive patient:

& Bansfusion reaction tion does not does not scen occur the first time an Rh Negative patient is Exposed to Rh positive Blood because kh alegative patient has not yet had time to form antibodies against The Rh positive Blood