What does a person’s Rh factor status, described as either positive or negative, refer to?
AThe number of white blood cells in their body
BTheir overall blood sugar level
CTheir blood's clotting speed alone
DWhether a specific antigen is present on the surface of their red blood cells
Explanation
A person’s Rh factor status refers to whether a specific protein, called the Rh antigen, is present on the surface of their red blood cells, with its presence indicated as Rh positive and its absence as Rh negative. This factor is an important consideration alongside the ABO blood type when matching blood for transfusions, since mismatched Rh status can trigger a harmful immune reaction. Rh compatibility is also closely monitored during pregnancy, since complications can arise if an Rh-negative mother carries an Rh-positive baby. Explore more Everyday Science MCQs on mcqstutor to keep practicing.
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