EasyZoologyBody fluid and circulation
+4 / -1
The Rh factor is:
A
An enzyme present in RBCs
B
An antigen present on the surface of RBCs
C
An antibody present in plasma
D
A hormone secreted by the thyroid gland
Explanation
The Rh factor (Rh antigen or D antigen) is a protein antigen present on the surface of RBCs. About 80% of humans are Rh positive (possess the antigen). Rh incompatibility between an Rh-negative mother and Rh-positive fetus can cause erythroblastosis fetalis (haemolytic disease of the newborn).
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