41. Immune System
Adaptive Immunity
Multiple Choice
Multiple ChoiceHow do antibodies to foreign blood groups come to exist in the body?
A
The antibodies form when a fetus is exposed to its mother's blood late in pregnancy.
B
This phenomenon cannot be explained.
C
Even very limited exposure to the blood of another person can evoke the production of antibodies.
D
They are part of innate immunity and exist at birth.
E
The antibodies arise in response to bacterial inhabitants of the body that have epitopes very similar to blood groups and antigens.
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