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What does AB positive blood type mean?

Answer 1

(see below)

The surface of red blood cells may contain certain antigens (which can cause immune responses if foreign to the body). The possible antigens are: #color(white)("XXX")#A, #color(white)("XXX")#B, and #color(white)("XXX")#Rh

An #AB+# blood type contains all 3 antigens (the #+# refers to the presents of the Rh antigen.

Receiving blood that contains an antigen that is not naturally present in the body can be fatal, but receiving blood that does not contain an antigen that is typically present in the body is not problematic.

An individual with AB+ blood could safely receive a transfusion from anyone, but they could only safely give blood to another AB+ individual.

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Answer 2

Lydia Antoine

AB positive blood type means that a person has both A and B antigens on the surface of their red blood cells, and their blood plasma does not contain any antibodies against type A or B blood. This blood type is considered the universal recipient because AB positive individuals can receive blood from any other blood type.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.