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Doctors Medicines MCQs Q&A

Under the ABO method, a person with an unknown blood group loses a lot of blood in a road accident and needs an immediate blood transfusion. A friend of his, who has a valid certificate of his blood group, requests for blood donation without any delay. The blood group of the blood donor is:

Under the ABO method, a person with an unknown blood group loses a lot of blood in a road accident and needs an immediate blood transfusion. A friend of his, who has a valid certificate of his blood group, requests for blood donation without any delay. The blood group of the blood donor is: Correct Answer O

Concept:-

  • Blood groups: the surface of red blood cells carries a range of different proteins (antigen). These antigens which are inherited determine the blood group.
  • Individuals can make antibodies to these antigens, but not to their own type of antigen since if they did the antigens and antibodies would react

Explanation:-

  • There are many different collections of red cell surface antigens, but the most important are ABO and Rhesus systems.
  • ABO method: the test to determine the blood group.

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Universal donor:  

  • Blood group O is compatible with all groups because O red cells have no antigens, and will therefore not stimulate anti - Or anti - B antibodies.

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