PSL201Y1 Lecture Notes - Lecture 5: Thyroid, Bradycardia, Thyrotropin Receptor
Document Summary
The thyroid is located infant of the trachea. It has 4 associative glands called the parathyroid glands. They are not associated to the thyroid by their functions. The hormones t3 and t4 are produced by the thyroid. The number of iodine molecules determine whether the molecule is called t3 or. There is less of t3 in the body but it is more potent than t4 which is more in quantity. If there is an excess of t3 and t4 in the body, a signal is sent to the hypothalamus to stop secretion of the hormone. The colloid contains thyroglobulin; a protein that contains tyrosine residues produced by the follicular cells, enzymes and iodide which is gotten from our food diet. Dit and mit join to form the t3 molecule and the Phagocytosis of thyroglobulin bound to t3 and t4. They are receptors of tsh on the gland.
