Emergency Medical Technician (EMT) Intermediate Practice Exam

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Prepare for the Emergency Medical Technician (EMT) Intermediate Test with focused study methods including flashcards and multiple-choice questions. Practice with hints and detailed explanations to boost your readiness for the exam.

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Which statement about type O blood is accurate?

It contains A and B surface antigens
It has universal donor capability
It contains no surface antigens
It can only receive O type blood

The correct answer is: It contains no surface antigens

Type O blood is characterized by the absence of A and B surface antigens on the red blood cells. This lack of antigens makes it unique compared to other blood types, which do have specific antigens. Because type O blood doesn't have these antigens, it is often referred to as the universal donor type for red blood cells. This is due to its compatibility with all other blood types in emergency transfusions since there is no risk of an immune reaction from A or B antigens. In terms of compatibility for receiving blood, individuals with type O blood can only safely receive type O blood, as receiving A or B blood could trigger an immune response due to the presence of foreign antigens. This is why the statement about type O blood containing no surface antigens is accurate, as it underpins both its universal donor status and its compatibility limitations regarding blood transfusions.