Thyroid gland
Thyroid gland
Thyroid gland
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REGULATION OF THYROID HORMONE SECRETION<br />
* Hypothalamo-hypophyseal-thyreoid axis<br />
* Extrathyroid metabolism of thyroid hormones –<br />
activation of T 4 to T 3 (inactivation to rT 3 )<br />
Deiodase-Isoenzymes<br />
* dietary uptake of iodine – iodine metabolism