SCIENCE
CIRCULATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A
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AB
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B
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O
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Detailed explanation-1: -For emergency transfusions, blood group type O negative blood is the variety of blood that has the lowest risk of causing serious reactions for most people who receive it. Because of this, it’s sometimes called the universal blood donor type.
Detailed explanation-2: -Universal donors are those with an O negative blood type. Why? O negative blood can be used in transfusions for any blood type.
Detailed explanation-3: -Type O blood is called the universal donor because: It has neither A nor B surface antigens on the red blood cells. Antigens are proteins that are capable of evoking an allergic response in someone whose whole body does not have the antigens.
Detailed explanation-4: -Why is O + a universal donor? Although O+ is considered to be a universal donor, O-is the actual universal donor because A, B, and Rh antigens are absent in the latter. So, it can be given to anyone, irrespective of the blood group.
Detailed explanation-5: -Since both A and B antigens are present in a person with AB+ blood and it has a positive Rh factor, the recipient will not reject the blood.