The reason why babies born to mothers with Graves' disease suffer passively from the disease for only a short while after birth is that _____.
A) very little IgM is transported across the placenta
B) only antibodies,and not the B cells making the autoantibodies,cross the placenta
C) the newborn's regulatory T cells suppress autoantibody production
D) the newborn's thyroid gland develops resistance to the effects of maternal autoantibodies
E) thyroglobulin synthesis does not commence until months after birth.
Correct Answer:
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