Fig. 15.8 
Schematic representation of thyroid hormone synthesis and release in a single cell of a thyroid follicle. 
The six major stages in the biosynthesis and release of thyroid hormones, namely (i) iodine transport, (ii) oxidation, (iii) coupling, (iv) colloid resorption, (v) proteolysis, and (vi) deiodination, are shown.