Difference between revisions of "Urea"
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| − | Also known as '''''Blood Urea | + | {{unfinished}} |
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| + | {| cellpadding="10" cellspacing="0" border="1" | ||
| + | | Also known as: | ||
| + | |'''Blood Urea Nitrogen - BUN''' | ||
| + | |- | ||
| + | | See also: | ||
| + | |'''[[Blood urea nitrogen|Urea in lizards]]''' | ||
| + | |} | ||
==Description== | ==Description== | ||
Urea is a form of nitrogenous waste formed from [[Ammonia|ammonia]] via the urea cycle in the liver. It freely crosses lipid membranes and is filtered into the glomerular filtrate in the renal glomerulus. A proportion of this filtered urea is reabsorbed passively before final excretion and it forms a vital of the concentration gradient needed to prevent passive diuresis. | Urea is a form of nitrogenous waste formed from [[Ammonia|ammonia]] via the urea cycle in the liver. It freely crosses lipid membranes and is filtered into the glomerular filtrate in the renal glomerulus. A proportion of this filtered urea is reabsorbed passively before final excretion and it forms a vital of the concentration gradient needed to prevent passive diuresis. | ||
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==Clinical Significance== | ==Clinical Significance== | ||
An increase in serum concentrations of urea and creatinine is known as '''[[Azotaemia|azotaemia]]''' and it is found almost exclusively in animals with kidney disease. | An increase in serum concentrations of urea and creatinine is known as '''[[Azotaemia|azotaemia]]''' and it is found almost exclusively in animals with kidney disease. | ||
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Blood urea coentration may be elevated independently of creatinine for the following reasons: | Blood urea coentration may be elevated independently of creatinine for the following reasons: | ||
*Gastro-intestinal haemorrhage, as with [[Gastric Ulceration - Dog|gastro-duodenal ulceration]]. | *Gastro-intestinal haemorrhage, as with [[Gastric Ulceration - Dog|gastro-duodenal ulceration]]. | ||
| − | *Diet with high | + | *Diet with high purine content, such as liver. |
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| − | Reduced urea concentration | + | Reduced urea concentration: |
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| − | + | [[Category:Blood_Sample]][[Category:Dog]][[Category:Cat]][[Category:Cattle]][[Category:Sheep]][[Category:Horse]][[Category:Pig]][[Category:Donkey]][[Category:To_Do_-_James]] | |
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Revision as of 20:00, 23 July 2010
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This article is still under construction. |
| Also known as: | Blood Urea Nitrogen - BUN |
| See also: | Urea in lizards |
Description
Urea is a form of nitrogenous waste formed from ammonia via the urea cycle in the liver. It freely crosses lipid membranes and is filtered into the glomerular filtrate in the renal glomerulus. A proportion of this filtered urea is reabsorbed passively before final excretion and it forms a vital of the concentration gradient needed to prevent passive diuresis.
Clinical Significance
An increase in serum concentrations of urea and creatinine is known as azotaemia and it is found almost exclusively in animals with kidney disease.
Blood urea coentration may be elevated independently of creatinine for the following reasons:
- Gastro-intestinal haemorrhage, as with gastro-duodenal ulceration.
- Diet with high purine content, such as liver.
Reduced urea concentration: