What is responsible for the fatal reaction that occurs when type A blood is given to an individual that has type B blood.
Antibodies from the type B blood attack the antigen in the type A blood.
The antigens in the type A blood attack the type B blood.
The blood types mix to form type AB blood with both A and B antigens.
No reaction occurs, blood type A is the universal donor.
2007-04-25 13:23:07 · 5 answers · asked by whatsinaname07 1 in Science & Mathematics ➔ Biology
Answer A is correct. The Type B blood's antibodies don't recognize the A antigen ... the A antigen is foreign to the person.
2007-04-25 13:27:23 · answer #1 · answered by ecolink 7 · 0⤊ 0⤋
An interesting sub-question is why someone with Type O blood (who has never "seen" the A or B antigens before and should therefore not have antibodies against these antigens) will have an immediate antibody-mediated reaction to type A or B blood. It turns out that bacteria in the gut produce antigens that resemble the A and B antigens, and a Type O person has therefore seen the A and B antigens -but not in blood- and recognizes them as foreign.
The question has already been answered correctly. The second choice is wrong because antigens don't "attack" anything. The third choice is nonsensical. The fourth choice is wrong because O is the universal donor. A related question: what blood type is the universal acceptor and why?
[EDITED]
Amy: shhh, I was trying to get the original poster to think a little deeper. ;)
2007-04-25 13:36:53 · answer #2 · answered by Cycologist 2 · 1⤊ 0⤋
Antibodies from the type B blood attack the antigen in the type A blood.
2007-04-25 13:26:24 · answer #3 · answered by Cindy L 2 · 0⤊ 0⤋
Cycologist--Type AB is the universal acceptor because it is "used to" both A and B antigens and doesn't attack either.
2007-04-25 13:57:57 · answer #4 · answered by Amy F 5 · 0⤊ 0⤋
even as O- is seen "commonplace donor" there appears new techniques on the issue of this "contained in the previous, someone with blood form O unfavorable blood replaced into seen to be a typical donor. It meant his or her blood would nicely take delivery of to all and sundry, inspite of blood form, without causing a transfusion reaction. it truly is now no longer a correct theory because of a extra effectual recognize-how of the complicated themes of immune reactions concerning incompatible donor blood cells."
2016-12-04 21:12:58 · answer #5 · answered by ? 4 · 0⤊ 0⤋