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Thyroxine, also known as T 4, is a hormone produced by the thyroid gland.It is the primary form of thyroid hormone found in the blood and acts as a prohormone of the more active thyroid hormone, triiodothyronine (T 3). [1]
Thyroid hormones act on nearly every cell in the body. They act to increase the basal metabolic rate, affect protein synthesis, help regulate long bone growth (synergy with growth hormone) and neural maturation, and increase the body's sensitivity to catecholamines (such as adrenaline) by permissiveness. [12]
Escherichia virus T4 is a species of bacteriophages that infect Escherichia coli bacteria. It is a double-stranded DNA virus in the subfamily Tevenvirinae of the family Straboviridae . T4 is capable of undergoing only a lytic life cycle and not the lysogenic life cycle .
T4 is a prohormone; that is, T4 is a precursor to the hormone T3. Whereas T4 is a tetraiodide, T3 is a triiodide, triiodothyronine. The T4 → T3 conversion is mediated by the selenoenzyme iodothyronine deiodinase. T3-thyroxine is a unique example of an iodine compound that is essential for human health.
Activation of macrophage or B cell by T helper cell. The T helper cells (T h cells), also known as CD4 + cells or CD4-positive cells, are a type of T cell that play an important role in the adaptive immune system.
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 therapy.
The Summary. A test designed to identify biomarkers associated with autism just became available in most states. The test is meant to help physicians rule out autism in children who have higher ...
Viktor Brack, organiser of the T4 Programme Garage of the "Grey Buses" Interior of the bus garage. Since the late 19th century, doctors and scientists had been developing theories of racial purity based on eugenics, a concept popular at the time that developed from several disciplines including social history, biology, anthropology and genetics. [5]