Anatomy & Physiology Circulatory #18

Question

Which student statement regarding blood types requires clarification from the instructor?

Answers

  1. “I have type A blood.”
    • Rationale:

      An individual with type A blood has the A glycoprotein; therefore, this student statement does not require clarification from the instructor.

  2. “I have type B blood.”
    • Rationale:

      An individual with type B blood has the B glycoprotein; therefore, this student statement does not require clarification from the instructor.

  3. “I have type O blood.”
    • Rationale:

      An individual with type O blood has neither the A or B glycoprotein; therefore, this student statement does not require clarification from the instructor.

  4. “I have type X blood.”
    • Rationale:

      There is no X blood type; therefore, this student statement requires clarification from the instructor. Blood types are type A, type B, type AB, and type O.

Overview

An individual’s blood type is a classification of blood which is based on the presence, and absence, of antibodies and inherited antigenic substances on the surface of red blood cells (RBCs).

Explanation

Learning Outcomes

Antigens may be carbohydrates, glycolipids, glycoproteins, or proteins, depending on the blood group system. There are two primary glycoproteins that determine an individual’s blood type, A and B. X is not a glycoprotein that determines an individual blood type; therefore, the student statement, “I have type X blood.” requires clarification from the instructor.

Test Taking Tip

The statement that is not indicative of a blood type is the one that requires clarification; therefore, this is the correct choice for this question.

Video Rationale