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The hypothalamic–pituitary–thyroid axis ( HPT axis for short, a.k.a. thyroid homeostasis or thyrotropic feedback control) is part of the neuroendocrine system responsible for the regulation of metabolism and also responds to stress. As its name suggests, it depends upon the hypothalamus, the pituitary gland, and the thyroid gland .
Euthyroid sick syndrome ( ESS) is a state of adaptation or dysregulation of thyrotropic feedback control [ 1] wherein the levels of T3 and/or T4 are abnormal, but the thyroid gland does not appear to be dysfunctional. This condition may result from allostatic responses of hypothalamus-pituitary-thyroid feedback control, dyshomeostatic disorders ...
In generalised terms, a tax return refers to the yearly income declaration created by the taxpayer for every individual in the country. This enables tax authorities to declare if an individual is eligible to be given back the tax that they had paid over the year. Canadian federal tax returns are filed with the Canada Revenue Agency (CRA).
The major form of thyroid hormone in the blood is thyroxine (T 4), whose half-life of around one week [4] is longer than that of T 3. [5] In humans, the ratio of T 4 to T 3 released into the blood is approximately 14:1. [6] T 4 is converted to the active T 3 (three to four times more potent than T 4) within cells by deiodinases (5′-deiodinase).
Form 1098-T. Form 1098-T, Tuition Statement, is an American IRS tax form filed by eligible education institutions (or those filing on the institution's behalf) to report payments received and payments due from the paying student. The institution has to report a form for every student that is currently enrolled and paying qualifying tuition and ...
The Canada Revenue Agency ( CRA; French: Agence du revenu du Canada; ARC) is the revenue service of the Canadian federal government, and most provincial and territorial governments. The CRA collects taxes, administers tax law and policy, and delivers benefit programs and tax credits. [ 4] Legislation administered by the CRA includes the Income ...
Form 1040, officially, the U.S. Individual Income Tax Return, is an IRS tax form used for personal federal income tax returns filed by United States residents. The form calculates the total taxable income of the taxpayer and determines how much is to be paid to or refunded by the government. Income tax returns for individual calendar-year ...
The precise mechanism for the development of thyroid storm is poorly understood. In the human body, thyroid hormone may be free (biologically active T3/T4) or bound to thyroid binding hormone (biologically inactive) for transport. The release of thyroid hormone is tightly regulated by a feedback system involving the hypothalamus, pituitary ...