Triiodothyronine

Graves’Dissease is an autoimmune disorder which affects the Thyroid gland. Normally, the immune system protects the body from infection by identifying and destroying bacteria, viruses, and other potentially harmful foreign substances…but in autoimmune diseases, the immune system attacks the body’s own cells and organs. Graves’Dissease is the most common cause of hyperthyroidism in the United States. Hyperthyroidism is a disorder that occurs when the thyroid gland makes more thyroid hormone than the body needs. Thyroid gland makes to thyroid hormones T3 (Triiodothyronine) and T4 (Thyroxine). T3 is made from T4 it is the more active hormone, directly affecting the tissues. Both hormones circulate throughout the body in the blood stream and act on virtually every tissue and cell how does the thyroid make T3 and T4 When the body is in need of T3 and T4…

Thyroxine is an iodine-containing, thyroid hormone produced by the thyroid gland. Along with thyroxine, triiodothyronine is also produced in the thyroid gland. Thyroxine usually is converted into triiodothyronine by enzymes in target cells called deiodinases. Concentrations of thyroxine are usually greater in the body, but triiodothyronine is considered the major thyroid hormone. Thyroxine production is controlled by the pituitary gland. The hypothalamus will secrete thyrotropin-releasing…

This gland regulates several “vital body functions” (Brady, 2015). The thyroid gland is part of the endocrine system, which consists of glands that “produce, store, and release hormones into the bloodstream so they can reach the body’s cells” (Brady, 2015). The thyroid gland generates Triiodothyronine (T3) and Thyroxine (T4) from iodine which develops from foods. The hypothalamus and the pituitary (glands in the brain) “communicate to maintain T3 and T4 balance” (Brady, 2015). The hypothalamus…

Tara Tate Megan Brejcha Anatomy & Physiology II 13512 F17 Thyroid Disorders: An Overview The thyroid gland is a small x-shaped gland that lies in the front of the neck and is part of the body’s endocrine system. Located below the Adam’s apple along the trachea, the thyroid consists of two lobes joined by an isthmus, or middle section. It is an important gland in that it regulates metabolism and growth and affects almost every organ of the body. The thyroid uses iodine in the…

Triiodothyronine, with a chemical name of 3,3',5-Triiodothyronine (T3), is one of four thyroid hormones that exhibit biological activity, and contains 3 iodines and 2 tyrosine’s, as seen in Fig. 1. 20 % of T3 is formed from the amino acid tyrosine within specific follicle cells of the thyroid gland by the oxidative condensation of its biological precursors, monoiodotyrosine and diiodotyrosine, and is then subsequently secreted into the bloodstream. The remaining 80% is produced from the…

body is kept balanced by the interaction of the nervous system and the endocrine system. The endocrine system is composed of endocrine glands that secrete hormones. Hormones are regulators of metabolism, growth, development, reproduction, and other activities. They also play roles in fluid and electrolyte balance, acid-base balance, and energy metabolism 1. One of the hormones is called the thyroid-stimulating hormone (TSH). The job of these hormones promote and maintain the growth and…

anxiety, restlessness and tremors (Pullen & Embrey, 2013, p. 15). As the condition worsens and becomes thyroid storm, more severe symptoms occur, such as palpaitations, atrial fibrillation, widening pulse pressures, nausea, vomiting, hepatomegaly, jaundice, tachypnea, confusion, delirium, seizures, and coma (Pullen & Embrey, 2013, p. 15). The three most common symptoms of thyroid storm are high fever (over 106.7°), exaggerated tachycardia and central nervous dysfunction (Pullen & Embrey, 2013,…

Negative feedback is an important physiological regulation and control. Body water volume is a regulated variable. Disproportion of water volume in the body (too high or too low), require the action of hormone. In case of abnormal loss of body fluids, ADH will help to maintain body fluids by reducing the elimination of urine. ADH impact is example of negative feedback effect, where physiological regulation is maintained. Maintained body Water volume > excessive loos +>…

In recent years, thyroid nodules have become one of the common endocrine problems in the United States. The vast majority of thyroid nodules detected during physical examination are benign; however, 5-10% of palpable nodules prove to be malignant on biopsy (1, 2). On palpation, a solid thyroid nodule has a higher chance of being malignant (3,4). The American Thyroid Association and the American Society of Radiologists in the United States have defined various ultrasound (US) based prognostic…

Why am I having this test? The fractionated plasma-free metanephrines test is used to screen for a type of adrenal gland tumor called pheochromocytoma. You may have this test if you have symptoms of pheochromocytoma or a family history of this type of tumor. What is being tested? This test measures the amount of metanephrine and normetanephrine in your blood. Metanephrine and normetanephrine are substances that appear in your blood after adrenaline and other hormones break down. Increased levels…