OSMT (Ontario Society of Medical Technologists) Practice Exam

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Where is the Rh factor found?

a. WBCs of people who are Rh negative

b. RBCs of people who are Rh negative

c. WBCs of people who are Rh positive

d. RBCs of people who are Rh positive

The Rh factor is a specific protein that is present on the surface of red blood cells (RBCs) in individuals who are Rh positive. When testing for blood types, one of the key distinctions is the presence or absence of this protein. Those who are Rh positive have the Rh factor on their RBCs, while those who are Rh negative do not have this protein at all. This distinction is crucial in blood transfusions and pregnancy, as the compatibility of blood types can have significant health implications.

Understanding the location of the Rh factor helps in various clinical situations, such as determining blood type for transfusions or assessing pregnancy risks related to Rh incompatibility.

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