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May 27th
April 23rd
- AltaVista Advanced Search: ure ammonia uric acid water
- www2.sunysuffo lk.edu/anastaj /BY52 web page/Powerpoin t/excretion.pp t
March 27th
March 12th
- Cholesterol: Metabolism and excretion Cholesterol is oxidized by the liver into a variety of bile acids. These in turn are conjugated with glycine, taurine, glucuronic acid, or sulfate. A mixture of conjugated and non-conjugated bile acids along with cholesterol itself is excreted from the liver into the bile. Approximately 95% of the bile acids are reabsorbed from the intestines and the remainder lost in the feces. The excretion and reabsorption of bile acids forms the basis of the enterohepatic circulation which is essential for the digestion and absorption of dietary fats. Under certain circumstances, when more concentrated, as in the gallbladder, cholesterol crystallises and is the major constituent of most gallstones, although lecithin and bilirubin gallstones also occur less frequently.
March 8th
January 31st
- Clinical Trials - Pharmacology - Excretion - Biliary Excretion - Merck Manual Professional - 2007: Biliary excretion: Some drugs and their metabolites are extensively excreted in bile. Because they are transported across the biliary epithelium against a concentration gradient, active secretory transport is required. When plasma drug concentrations are high, secretory transport may approach an upper limit (transport maximum). Substances with similar physicochemica l properties may compete for excretion. Drugs with a mol wt > 300 g/mole and with both polar and lipophilic groups are more likely to be excreted in bile; smaller molecules are generally excreted only in negligible amounts. Conjugation, particularly with glucuronic acid, facilitates biliary excretion. In the enterohepatic cycle, a drug secreted in bile is reabsorbed into the circulation from the intestine. Biliary excretion eliminates substances from the body only to the extent that enterohepatic cycling is incomplete?whe n some of the secreted drug is not reabsorbed from the intestine.
January 13th
December 27th
- What is the Lillipad? Squatting on the toilet for health.: adapter for standard toilets that provides a more natural pooping posture.
December 1st
- Physiology of the Kidney (page 1): from Oxford University. Breaks down the kidney in detail. Filtration , Functions, excretion, hormones
November 17th
- nitrogen metabolism: talks about how the body gets rid of excess nitrogen in the body
November 13th
- excretion: intresting.... .
November 12th
- Nitrogen Metabolism and the Urea Cycle: This shows how nitrogen is broken down and how we excrete unwanted substances via urea in the urine.
October 31st
- The kidneys and body balance. Overview.: Notes and interactive questions on the kidney, excretory system, dialysis and transplants. Quiz at the end. IGCSE level
September 5th
- Dialysis Animation
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Calcium helps more than bones - La Crosse Tribune
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