Publisher Summary This chapter discusses that the thyroid gland maintains constant levels
of thyroid hormones, thyroxine and triiodo thyronine, in the circulation of most mammalian
species. This ability of the thyroid gland is based on the highly regulated sequence of steps
in the secretory process: Thyroglobulin, the macromolecular secretory product, and the
precursor of thyroid hormones, is released and stored in the follicle lumen where it remains
segregated from the extrafollicular space by a tight epithelial monolayer. Studies on …