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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 .
Thyroid hormones are any hormones produced and released by the thyroid gland, namely triiodothyronine ( T3) and thyroxine ( T4 ). They are tyrosine -based hormones that are primarily responsible for regulation of metabolism. T 3 and T 4 are partially composed of iodine, derived from food. [ 2] A deficiency of iodine leads to decreased ...
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 ...
HP Envy. HP Pavilion is a line of consumer-oriented laptop and desktop computers produced by HP Inc. Introduced in 1995, HP has used the name for both desktops and laptops in its home and home office product range. The Pavilion mainly competes against computers such as Acer 's Aspire, Dell 's Inspiron and XPS, Lenovo 's IdeaPad, Samsung 's Sens ...
Thyroid function tests ( TFTs) is a collective term for blood tests used to check the function of the thyroid. [ 1] TFTs may be requested if a patient is thought to suffer from hyperthyroidism (overactive thyroid) or hypothyroidism (underactive thyroid), or to monitor the effectiveness of either thyroid-suppression or hormone replacement ...
HVAC control system. HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [ 1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be ...
Pavilion dv2000. First model in the Pavilion dv2000 series, released in 2006. The dv2000t sub-brand uses Intel CPUs, generally Intel Core Solo, Duo and Celeron, while the dv2000z uses AMD CPUs, generally AMD Turion and Sempron. Both models came with either integrated or discrete graphics. It uses the Wave pattern as part of HP's Imprint finish.
The Air Current was first to report on the problems. The 777X, billed by Boeing as the “world’s largest and most efficient twin-engine jet,” was supposed to enter service in 2020.