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Keywords: kidney
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Journal Articles
J Exp Biol (2019) 222 (12): jeb201780.
Published: 27 June 2019
... the osmoregulatory mechanisms that enable them to maintain internal homeostasis in hypoosmotic environments. In the present study, we focused on the kidney because this is the only organ that can excrete excess water from the body in a hypoosmotic environment. We conducted a transfer experiment of bull sharks from...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (9): jeb198259.
Published: 9 May 2019
... in osmolality, which may indicate a net uptake of water in aquatic hypercapnia. The kidney appeared to play only a minor role in the elevation of plasma [HCO 3 − ] when M. albus was submerged. However, hypercapnia did lead to an elevation in renal excretion of ammonia, but the attendant rise in the total...
Journal Articles
J Exp Biol (2014) 217 (16): 2855–2865.
Published: 15 August 2014
...Patricia A. Wright; Chris M. Wood; Jonathan M. Wilson Increased renal ammonia excretion in response to metabolic acidosis is thought to be a conserved response in vertebrates. We tested the hypothesis that Rhesus (Rh) glycoproteins in the kidney of the freshwater common carp, Cyprinus carpio , play...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (10): 1775–1781.
Published: 15 May 2012
...– concentrations between plasma and environment was taken into account (freshwater eels, 6.2 vs 0.3 mmol l –1 ; seawater eels, 0.7 vs 30 mmol l –1 ). One hour after injection of 35 SO 4 2– into the blood of seawater eels, the kidney excreted ∼97% of the ionized form, whereas the radioactivity increased gradually...
Includes: Supplementary data
Journal Articles
J Exp Biol (2011) 214 (13): 2140–2156.
Published: 1 July 2011
...Leslie S. Babonis; Stephanie N. Miller; David H. Evans SUMMARY To understand renal responses to salinity change in aquatic reptiles, we examined the structure and function of the kidney in three species of snake: a marine species with a salt gland ( Laticauda semifasciata ), a marine species...
Journal Articles
J Exp Biol (2011) 214 (10): 1783–1790.
Published: 15 May 2011
... linearly from 6 h after SW transfer; however, this did not immediately translate to increased SO 4 2– excretion because the volume of urine was decreased. We identified five SO 4 2– transporters in the eel kidney. Three of these ( Slc26a1, Slc26a6b and Slc26a6c ) are expressed in both SW- and FW-acclimated...
Journal Articles
J Exp Biol (2010) 213 (3): 368–379.
Published: 1 February 2010
...C. K. Tipsmark; K. J. Sørensen; S. S. Madsen SUMMARY Osmotic balance in fish is maintained through the coordinated regulation of water and ion transport performed by epithelia in intestine, kidney and gill. In the current study, six aquaporin (AQP) isoforms found in Atlantic salmon ( Salmo salar...
Journal Articles
J Exp Biol (2009) 212 (19): 3156–3163.
Published: 1 October 2009
... between regional blood flow and tissue oxygen tension. The abundance of transport proteins was determined by immunoblotting. In the obstructed kidney, AUUO caused a prompt decrease in medullary tissue P O 2 to 60% of baseline level whereas cortical tissue P O 2 was unchanged. By contrast, tissue P O 2...
Journal Articles
J Exp Biol (2009) 212 (14): 2183–2193.
Published: 15 July 2009
..., and only the former has thus far been cloned in fish. We successfully cloned the V1a-type and V2-type AVT receptor from the kidney of the African lungfish, Protopterus annectens , and the deduced amino acid sequences exhibited high homology with amphibian V1a- and V2-type receptors, respectively...
Journal Articles
J Exp Biol (2009) 212 (11): 1647–1661.
Published: 1 June 2009
... of metabolic compensation, with the kidney playing a supporting role. At the gill, cytosolic CA catalyses the hydration of CO 2 to H + and HCO 3 – for export to the water. In the kidney, cytosolic and membrane-bound CA isoforms have been implicated in HCO 3 – reabsorption and urine acidification...
Journal Articles
J Exp Biol (2009) 212 (3): 413–423.
Published: 1 February 2009
...Shree Ram Singh; Steven X. Hou SUMMARY Excretion is an essential process of an organism's removal of the waste products of metabolism to maintain a constant chemical composition of the body fluids despite changes in the external environment. Excretion is performed by the kidneys in vertebrates...
Journal Articles
J Exp Biol (2009) 212 (2): 249–256.
Published: 15 January 2009
...Minoru Uchiyama; Ryosuke Kikuchi; Norifumi Konno; Tatsuya Wakasugi; Kouhei Matsuda SUMMARY Urea is the major excretory end product of nitrogen metabolism in most chelonian reptiles. In the present study, we report the isolation of a 1632 base pair cDNA from turtle kidney with one open reading frame...
Journal Articles
J Exp Biol (2008) 211 (10): 1524–1534.
Published: 15 May 2008
.... In the goldfish intestine,occludin immunolocalized in a TJ-specific distribution pattern to apical regions of columnar epithelial cells lining the intestinal lumen. In the goldfish kidney, occludin was differentially expressed in discrete regions of the nephron. Occludin immunostaining was strongest in the distal...
Journal Articles
J Exp Biol (2008) 211 (6): 852–859.
Published: 15 March 2008
...Ray C. Bartolo; John A. Donald SUMMARY In desert rodents, the production of concentrated urine is essential for survival in xeric environments in order to conserve water. Reabsorption of water in the kidney is dependent on large osmotic gradients in the renal medulla. This causes the renal cells...
Journal Articles
J Exp Biol (2007) 210 (22): 4005–4015.
Published: 15 November 2007
...Edwin J. W. Geven; Nha-Khanh Nguyen; Marcel van den Boogaart; F. A. Tom Spanings; Gert Flik; Peter H. M. Klaren SUMMARY In teleosts, the thyroid gland is mostly found in the subpharyngeal region. However, in several species thyroid follicles are found in, for example,heart, head kidney and kidney...
Includes: Supplementary data
Journal Articles
J Exp Biol (2007) 210 (11): 1944–1959.
Published: 1 June 2007
... for metabolic acid–base disturbances, a mechanism that is not employed by water-breathing fish. Like fish and amphibians, however, extra-renal routes play a key role in metabolic compensation. acid–base balance ventilation lung gill kidney acidosis alkalosis African lungfish Protopterus annectens...
Journal Articles
J Exp Biol (2006) 209 (7): 1207–1216.
Published: 1 April 2006
... and distribution of the urea transporter (UT) in the kidney of the marine toad( Bufo marinus ), and its expression in the kidney and urinary bladder following exposure to dry and hyper-saline conditions by means of cDNA cloning, semi-quantitative RT-PCR, immunoblot analysis and immunohistochemistry. The Bufo UT...
Journal Articles
J Exp Biol (2005) 208 (20): 3859–3871.
Published: 15 October 2005
... and kidneys. Two different responses were recorded after a long-term freshwater acclimatization. (1) Successfully adapted sea-bass displayed standard behavior; their blood osmolality was maintained almost constant after the freshwater challenge, attesting to their efficient hyperosmoregulation...
Journal Articles
J Exp Biol (2004) 207 (19): 3399–3410.
Published: 1 September 2004
... physiological difference accounting for their greater freshwater tolerance. Our data suggest that southern killifish are less tolerant of freshwater transfer than are northerns because the coordinated response of their gills and kidney is less effective at maintaining ion balance. This may include small...
Journal Articles
J Exp Biol (2004) 207 (19): 3391–3398.
Published: 1 September 2004
... often deal with exceptionally high water intake rates in order to meet their high mass-specific energy demands. Birds that ingest large volumes of water may either eliminate excess water in the kidney or regulate the volume of water absorbed in the gastrointestinal tract. Because water absorption...