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Tamil Nadu Board of Secondary EducationHSC Science Class 11

An unconscious patient is rushed into the emergency room and needs a fast blood transfusion. Because there is no time to check her medical history or determine her blood type - Zoology

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Question

An unconscious patient is rushed into the emergency room and needs a fast blood transfusion. Because there is no time to check her medical history or determine her blood type, which type of blood should you as her doctor, give her?

Options

  • A

  • AB

  • O+

  • O

MCQ
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Solution

O

Explanation:

  • O blood type has no A or B antigens on the red blood cells, so it won’t trigger an immune reaction from recipients with type A, B, AB, or O blood.
  • Negative (Rh) ensures that Rh incompatibility does not cause a hemolytic reaction.

Hence, O blood is called the universal donor for red blood cell transfusions and is used in emergencies.

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Chapter 7: Body Fluids and Circulation - Evaluation [Page 132]

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Samacheer Kalvi Zoology [English] Class 11 TN Board
Chapter 7 Body Fluids and Circulation
Evaluation | Q 10. | Page 132
Samacheer Kalvi Biology (Zoology) [English] Class 11 TN Board
Chapter 7 Body Fluids and Circulation
Evaluation | Q 11. | Page 128
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