Adrenocorticosteroids wiki

Both versions are then enveloped in a relatively large glycoprotein complex called thyroglobulin and stored in the thyroid gland. To be released into the bloodstream for circulation throughout the body, the hormones are separated from thyroglobulin and bound to a much smaller globulin thyroxin-binding globulin or albumin. However, only % of thyroid hormone is "free" to be biologically active. Thyroid's action in the cell is to increase the biosynthesis of enzymes, resulting in heat production, oxygen consumption, and elevated metabolic rate. Thyroid stimulates the oxidation of fatty acids, and reduces cholesterol by oxidizing it into bile acids. Thyroid also stimulates enzymes for protein synthesis and, when present in excessive amounts, can catabolize (destroy) muscle protein. Estrogen causes food calories to be stored as fat. Thyroid hormone causes fat calories to be turned into usable energy. Thyroid hormone and estrogen have opposing actions. Estrogen inhibits thyroid action in the cells, interfering with the binding of thyroid to its receptor. Both hormones have phenol rings at a corner of their molecule. The respiratory enzymes of cells are thyroid-dependent. When thyroid function is low, cellular oxygen is low (cellular hypoxia). Thus, estrogen-induced thyroid interference contributes to less-than-optimal brain function. Excess estrogen may compete with thyroid hormone at the site of its receptor. In so doing, the thyroid hormone may never complete its mission, creating hypothyroid symptoms despite normal serum levels of thyroid hormone. Progesterone, on the other hand, increases the sensitivity of estrogen receptors for estrogen and yet, at the proper level, inhibits many of estrogen's side effects. GABA (gamma-aminobutyric acid) is an amino acid that acts as a neurotransmitter-inhibitor and tends to have a calming effect. When estrogen interferes with thyroid production and slows the metabolism of brain cells, it indirectly decreases GABA production and increases brain cell excitability, a factor in epilepsy.

The kidneys work by nonselectively filtering blood, under pressure, in millions of small units called glomeruli . The glomeruli are contained within the nephrons , the so-called functional units of the kidneys. The nephrons can be divided into distinct regions in which the absorptive processes are different: the proximal tubule , leading directly from the glomerulus; the loop of Henle; the distal tubule, leading away from the loop; and the collecting duct. These processes underlie the kidneys’ ability to form one litre of filtrate every eight minutes; 99 percent of this volume is normally reabsorbed, unless there has been excess fluid intake.

Isoniazid should not be administered with food. Studies have shown that the bioavailability of isoniazid is reduced significantly when administered with food. Tyramine- and histamine -containing foods should be avoided in patients receiving isoniazid. Because isoniazid has some monoamine oxidase inhibiting activity, an interaction with tyramine-containing foods (cheese, red wine) may occur. Diamine oxidase may also be inhibited, causing exaggerated response (., headache, sweating, palpitations , flushing, hypotension ) to foods containing histamine (., skipjack, tuna , other tropical fish).

Adrenocorticosteroids wiki

adrenocorticosteroids wiki

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