hyperthyroidism is affected by the thyroid hormones t3 (tri-iodothyronine) and t4 (thyroxine).
hyperthyroidism is affected by the thyroid hormones t3 (tri-iodothyronine) and t4 (thyroxine).
which body functions are affected by the thyroid​ hormones t3​(tri-iodothyronine) and t4​(thyroxine)?
hyperthyroidism
thyroid hormones are two hormones produced and released by the thyroid gland, namely triiodothyronine (t) and thyroxine (t). they are tyrosine-based hormones that are primarily responsible for regulation of metabolism. t and t are partially composed of iodine. a deficiency of iodine leads to decreased production of t and t, enlarges the thyroid tissue and will cause the disease known as simple goitre. the major form of thyroid hormone in the blood is thyroxine (t), which has a longer half-life than t. in humans, the ratio of t to t released into the blood is approximately 14:1. t is converted to the active t (three to four times more potent than t) within cells by deiodinases (5'-iodinase). these are further processed by decarboxylation and deiodination to produce iodothyronamine (ta) and thyronamine (ta). all three isoforms of the deiodinases are selenium-containing enzymes, thus dietary selenium is essential for t production.
thyroid hormones
thyroid hormones are responsible for controlling metabolism, nervous system, body temperature and development of several organ systems such as the reproductive system. the overproduction and under secretion of the thyroid hormones changes the function of the thyroid. hyperthyroidism and hypothyroidism are the two major dysfunctions associated to behavioral and brain chemistry changes due to the imbalances in the thyroid hormones, triiodothyronine (t) and thyroxine (t).









































section::::thyroid hormones.:thyroxine (t4) and triiodothyronine (t3).









































thyroxine (t4) and triiodothyronine (t3) are the main hormones released in the thyroid gland. they are synthesized from tyrosine and iodine in the blood stream.
behavioral endocrinology