OSMT (Ontario Society of Medical Technologists) Practice Exam

Question: 1 / 400

What is characteristic of a person with type AB blood?

a. A and B antigens on the RBCs and neither anti-A nor anti-B antibodies in the plasma

A person with type AB blood is characterized by the presence of both A and B antigens on the surface of their red blood cells (RBCs). This means that their immune system recognizes both antigens as "self" and does not produce any antibodies against them. Therefore, they have neither anti-A nor anti-B antibodies in their plasma. This unique combination allows individuals with type AB blood to receive blood from any ABO blood group, making them universal recipients.

The correct understanding of blood types is essential in transfusion medicine and helps prevent adverse reactions during blood transfusions. A person with AB blood represents a rare and distinct blood type, as they do not have the corresponding antibodies that would react against the A or B antigens. This characteristic is a key point in understanding human blood group compatibility.

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b. A antigens on the RBCs and anti-B antibodies in the plasma

c. B antigens on the RBCs and anti-A antibodies in the plasma

d. A and B antibodies on the RBCs and no antigens in the plasma

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