Thyroid hormone production and utilization involve several steps (Fig. 29-1). Thyroid gland activity is under the control of thyroid-stimulating hormone (TSH, space or thyrotropin), produced by the anterior pituitary. Pituitary TSH secretion is regulated by space thyrotropin-releasing hormone (TRH, thyroliberin, protirelin) from the hypothalamus. The main space raw material of thyroid hormone is inorganic iodide […]