Labels:text | screenshot | black and white | black | monochrome | document OCR: ed by the The two major active hormones produc ised from thyroid are T3 and T4. These are synthes ries of tyrosine residues in thyroglobulin in a s ently discrete steps (Fig. 15.8). They are subseq lin, and stored in the colloid bound in thyroglob b the later released from the follicular cells in d hormonecirculation. The steps involved in thyro ansport; synthesis are iodine concentration and t oxidation; coupling and secretion; colloi resorption; proteolysis; and deiodination