+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Excretion in mammals: role of the renal pelvis in the modification of the urinary concentration and composition

, : Excretion in mammals: role of the renal pelvis in the modification of the urinary concentration and composition. Federation Proceedings 36(11): 2493-2503

The mammalian renal pelvis has previously been regarded as having no physiological function other than that of a receptacle for the urine before it moves through the ureter. It has long been known that the renal pelvis in mammals shows elaborate extensions that bring the urine in intimate contact with outer and inner medullary tissue. The epithelium covering these areas is of a type that indicates that transport of solutes and water can take place across it. Physiological studies have shown that urea and water readily move across the renal papillary epithelium. The pronounced ability of ruminants to conserve urea when placed on a low protein diet coincides with a highly developed renal pelvis with specialized fornices and secondary pouches. It is suggested that urea conservation in low protein animals takes place partly in the renal pelvic extensions where urea is returned to the blood. A hypothesis is also proposed for the concentrating mechanism in which recycling of urea from the pelvic urine across the papillary epithelium plays an important role.


PMID: 902783

Other references

de Borst, M.H.; Diks, S.H.; Bolbrinker, J.; Schellings, M.W.; van Dalen, M.B.A.; Peppelenbosch, M.P.; Kreutz, R.; Pinto, Y.M.; Navis, G.; van Goor, H., 2007: Profiling of the renal kinome: a novel tool to identify protein kinases involved in angiotensin II-dependent hypertensive renal damage. Regulation of protein kinase activities is crucial in both physiology and disease, but analysis is hampered by the multitude and complexity of kinase networks. We used novel peptide array chips containing 1,152 known kinase substrate sequences to...

Sebrell, W.H.; Jr.; Harris, R.S., 1954: The vitamins. Chemistry, physiology, pathology. Vol. I. This is the first of three volumes which aim to provide a "guide service" to the wide fields of vitamin research. The order of treatment is alphabetical, and this volume contains chapters on vitamin A and carotene, ascorbic acid, vitamin...

Falcone, A.B., 1961: A method for determining the oxygen-18 content of orthophosphate or water. A method for determining the oxygen-18 content of orthophosphate or water is described. The method is based on the use of a high voltage discharge to bring about the rapid equilibration of oxygen-18 from water with carbon dioxide. Samples of KH2PO...

Bayless, M.; Dwyer, Q., 1997: Notes on the peach-throated monitor. Reptile and Amphibian Magazine. May; 47: 26-30

de Belle, J.; Steven.; Kanzaki, R., 1999: Protocerebral olfactory processing. Unknown

Senecal, T.D.; Parsons, A.T.; Buchwald, S.L., 2012: Room temperature aryl trifluoromethylation via copper-mediated oxidative cross-coupling. A method for the room temperature copper-mediated trifluoromethylation of aryl and heteroaryl boronic acids has been developed. This protocol is amenable to normal benchtop setup and reactions typically require only 1-4 h. Proceeding under mild co...

Perez, J.; Obando, A.D.rby, N., 1993: Efficacy of Bupofezin and conventional insecticides under different levels of SPWF populations. Proceedings (2): 721

Karparov A.; Christova D.; Yordanova A.; Assenova B., 1991: Indirect elisa for discovering plant viral antigens. Dokladi na B"lgarskata Akademiya na Naukite 44(3): 97-100

Prins, H.; Wien, J.J.F.; Daatselaar, C.H.G., 1998: Not by milk alone opportunities for widening and deepening activities concerning dairy cattle trade in the Green Heart. The study reports on an LEI-DLO project examining the possibilities for strengthening dairy cattle trade in the so-called 'Green Heart' of the Netherlands. The overall context is a demand from the sector for a shift from price support to...

Sakurai, N.; Iwamoto, S.; Miura, Y.; Nakamura, T.; Matsumine, A.; Nishioka, J.; Nakatani, K.; Komada, Y., 2013: Novel p53 splicing site mutation in Li-Fraumeni-like syndrome with osteosarcoma. We describe a 15-year-old girl with a novel germline p53 splice site mutation who developed an osteosarcoma. She received several cycles of chemotherapy with complete resection of the primary tumor without amputation, and has maintained remission...