Gastrointestinal absorption

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  • Tuyển tập các báo cáo nghiên cứu khoa học ngành y học tạp chí Medical Sciences dành cho các bạn sinh viên ngành y tham khảo đề tài: Inhibition by Natural Dietary Substances of Gastrointestinal Absorption of Starch and Sucrose in Rats 2. Subchronic Studies...

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  • (BQ) Part 2 book "Gastrointestinal physiology" presents the following contents: Gastric secretion, pancreatic secretion, bile secretion and gallbladder function, digestion and absorption of nutrients, fluid and electrolyte absorption, regulation of food intake.

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  • (BQ) Part 1 book "Gastrointestinal physiology" presents the following contents: Clinical gastrointestinal physiology a systems approach; form and function-the physiological implications of the anatomy of the gastrointestinal system; brain-gut axis and regional gastrointestinal tract motility; gastrointestinal secretion-aids indigestion and absorption.

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  • (BQ) Part 2 book "Gastrointestinal physiology" presents the following contents: Physiology of the liver, gallbladder and pancreas-"Getting By" with some help from your friends; nutrient exchange-matching digestion and absorption; salt and water-intestinal water and electrolyte transport; gastrointestinal manometry-tales of the intrepid transducer.

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  • Cerium, an element in the lanthanide series, has a number of radioactive isotopes. Several of these are produced in abundance in nuclear fission reactions associated with nuclear industry operations or detonation of nuclear devices. This report summarizes our present knowledge of the relevant physical, chemical, and biological properties of radiocerium as a basis for establishing radiation protection guidelines.

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  • Intravenous nutrition (IVN), also known as parenteral nutrition (PN), involves the administration of nutrients, electrolytes, minerals and fluid directly into patients’ veins. It is used in patients whose gastrointestinal absorption of food and/or fluids is inadequate, unsafe or inaccessible. Infusing a mixture of nutrients and fluid, however, is not without risk.

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  • (BQ) Part 2 book "Usmle road map physiology" presents the following contents: Gastrointestinal physiology, endocrine physiology, neurophysiology. Invite you to consult.

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  • Pharmacokinetic Interactions Causing Decreased Drug Effects Gastrointestinal absorption can be reduced if a drug interaction results in drug binding in the gut, as with aluminum-containing antacids, kaolin-pectin suspensions, or bile acid sequestrants. Drugs such as histamine H 2 receptor antagonists or proton pump inhibitors that alter gastric pH may decrease the solubility and hence absorption of weak bases such as ketoconazole.

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  • A Abatement: Reducing the degree or intensity of, or eliminating, pollution. Abatement Debris: Waste from remediation activities. Absorbed Dose: In exposure assessment, the amount of a substance that penetrates an exposed organism's absorption barriers (e.g.,, skin, lung tissue, gastrointestinal tract) through physical or biological processes. The term is synonymous with internal dose. Absorption Barrier: Any of the exchange sites of the body that permit uptake of various substances at different rates (e.g., skin, lung tissue, and gastrointestinal-tract wall).

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  • B12a; exchange of -CN for -OH group). Adverse effects, in the form of hypersensitivity reactions, are very rare. Folic Acid (B). Leafy vegetables and liver are rich in folic acid (FA). The minimal requirement is approx. 50 µg/d. Polyglutamine-FA in food is hydrolyzed to monoglutamine-FA prior to being absorbed. FA is heat labile. Causes of deficiency include: insufficient intake, malabsorption in gastrointestinal diseases, increased requirements during pregnancy.

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  • In food matrices, bioactivity of polyphenols like all dietary antioxidants in the human body, depends firstly on their bioaccessibility (i.e. the release from the food matrix) and bioavailability (i.e. absorbable fraction that can be used for specific physiological functions in organs). Polyphenols of comparatively high bioavailability include isoflavonids (absorption cover 50%, Bohn, 2010), while e.g. anthocyanins are of very low bioavailability, usually ca. 1.7% (Sakakibara et al., 2009). The prerequisite for bioavailability of any compound is its bioaccessibility in the gut.

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  • Nutritional Iron Balance The balance of iron in humans is tightly controlled and designed to conserve iron for reutilization. There is no regulated excretory pathway for iron, and the only mechanisms by which iron is lost from the body are blood loss (via gastrointestinal bleeding, menses, or other forms of bleeding) and the loss of epithelial cells from the skin, gut, and genitourinary tract. Normally, the only route by which iron comes into the body is via absorption from food or from medicinal iron taken orally.

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  • Of the complications of oral iron therapy, gastrointestinal distress is the most prominent and is seen in 15–20% of patients. Abdominal pain, nausea, vomiting, or constipation may lead to noncompliance. Although small doses of iron or iron preparations with delayed release may help somewhat, the gastrointestinal side effects are a major impediment to the effective treatment of a number of patients. The response to iron therapy varies, depending on the erythropoietin (EPO) stimulus and the rate of absorption.

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  • The gastrointestinal tract (GI tract) plays dual roles in hwnan physiology: digestion and uptake of nutrients and the more daunting task of maintaining immune homeostasis (protecting the body from potentially harmful microbes, while inducing tolerogenic responses to innocuous food, commensals and self-antigens). The unique architecture ofthe GI tract facilitates both ofthese functions; multiple levelsofinfolding results in an immense overall surface area that allows maximal nutrient absorption while housing the largest nwnber ofimmune cells in the body.

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