How is the concentration of thyroxine in the bloodstream regulated?

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    It is inhibited by the presence of thyroid-stimulating hormone (TSH).
    It is inhibited by the presence of thyroid-releasing hormone (TRH).
    by negative feedback mechanisms
    by the parathyroid gland

asked May 30, 2013 in Biology by anonymous
    

1 Answer

0 votes
by negative feedback mechanisms
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)



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