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Tuesday, August 4, 2020 | History

2 edition of Urine flow and diuresis in marine teleosts found in the catalog.

Urine flow and diuresis in marine teleosts

Allan L. Grafflin

Urine flow and diuresis in marine teleosts

by Allan L. Grafflin

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  • 21 Currently reading

Published by s.n. in S.l .
Written in English

    Subjects:
  • Osteichthyes.

  • Edition Notes

    Statementby Allan L. Grafflin.
    The Physical Object
    Paginationp. 602-610 ;
    Number of Pages610
    ID Numbers
    Open LibraryOL20251145M

    Bladder urine Mg 2+ concentration of marine teleosts is 57– mM (4, 26, 49), and urine/plasma ratios for Mg 2+ can exceed In glomerular or aglomerular marine teleost, renal tubular fluid secretion accounts for much or all initial urine production, respectively, and the renal proximal tubule is the major site of active fluid secretion. Diuresis (/ ˌ d aɪ j ʊ ˈ r iː s ɪ s /) is increased urination and the physiologic process that produces such an increase. It involves extra urine production in the kidneys as part of the body's homeostatic maintenance of fluid balance.. In healthy people, the drinking of extra water produces mild diuresis to maintain the body water balance. Many people with health problems such as heart.

    Drugs that increase urine flow (diuretic drugs) are often employed in the treatment of hypertension (high blood pressure) or other disease states. Three physiological categories of such drugs are ones that (i) function as loop diuretics, (ii) inhibit the action of aldosterone, and . Urine flow was found to be a function of size and of handling, as well as of salinity. Animals held in fresh water showed an initial diuresis which reached a peak approximately 2 hr after cannulation. Urine flow thereafter was in the range of ml/kg per day for fish weighing ± g, and the estimated GFR was ml/kg per day.

    Study 27 Chapter 29 Kidneys and Excretion flashcards from Lauren C. on StudyBlue. marine elasmobranchs maintain their plasma isoosmotic or slightly hyperosmotic to that of the surrounding environment, primarily due to the retention of urea ().Plasma sodium and chloride concentrations are generally higher than those found in marine teleosts, but the fish still face a continuous influx of NaCl across semipermeable membranes, particularly the gills (18, 20).


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Urine flow and diuresis in marine teleosts by Allan L. Grafflin Download PDF EPUB FB2

The present observations upon urine flow and urinary chloride in marine teleosts have led to the following conclusions: (1) that freshly caught sculpins and flounders, under fairly ideal and constant experimental conditions, show a rather wide variation in the rate of urine flow and the urinary chloride concentration; (2) that there is no direct relationship between the rate of urine flow and the urinary Cited by:   Addressing the numerous gaps in current information, Target Organ Toxicology in Marine and Freshwater Teleosts is an essential resource for researchers and professionals in aquatic toxicology and environmental risk assessment.

All the chapters are written by researchers who are internationally recognised for their work in mechanistic aspects of aquatic by: Pergamon Press. Printed in Great Britain EFFECT OF DIURETICS ON THE SECRETION AND REABSORPTION OF IONS IN THE KIDNEY OF MARINE TELEOSTS YU. NATOCHIN, G.

GUSEV, O. GONCHAREVSKAYA, E. LAVROVA and E. SHAKHMATOVA Institute of Evolutionary Physiology and Biochemistry, Leningrad, U.S.S.R. (Received 13 January ) by: 5. Grafflin AL () Urine flow and diuresis in marine teleosts. Am J Physiol – Google Scholar Grafflin AL () Glomerular degeneration in the kidney of Author: David H.

Evans. hypertonic urine, it appears that this fish does not continue to do so. It might be argued that the data in Table 1 suggest that the fish held in sea water for 20 days were somewhat diuretic, especially since Forster and Berglund (7) have reported that the urine of a marine teleost, known to be diuretic, was isotonic to the by: Background: In hyponatremia, due to the inappropriate secretion of antidiuretic hormone (SIADH), a high versus low solute intake will affect the urine volume (UV) and, hence, the SNa level.

The clinical implication of the fractional solute excretion is presented. Methods: In 35 normal controls and 24 patients with SIADH and urine osmolality higher than serum osmolality, we compared exact Author: Guy Decaux, Wim Musch.

Renal and extra-renal excretion of calcium in the marine teleost, Gadus morhua Article (PDF Available) in The American journal of physiology (1 Pt 2):R February with 66 Reads. Also of interest in relation to active transport processes is the phenomenon of "osmotic " or "laboratory diuresis " which Lopkius and other marine teleosts exhibit spontaneously immediately after capture when the electrolytic composition of urine shifts radically as a concomitant of increased flow rates of water across tubule cells.

Also of interest in relation to active transport processes is the phenomenon of "osmotic" or "laboratory diuresis" which Lopkius and other marine teleosts exhibit spontaneously immediately after capture when the electrolytic composition of urine shifts radically as a concomitant of increased flow rates of water across tubule cells.

-marine teleost is left with an excess of solutes because although the water enters its body hyperosmotically to its body fluids, the water leaks its body isosmotic to its body fluids-production of urine by marine teleostfish is a liability-Nitrogenous wastes and Na and Cl are voided across the gills Kidneys.

osmotic diuresis and its effect on total electrolyte distribution in plasma and urine of the aglomerular teleost, lophius americanus Roy P. Forster and Fredrik Berglund From the Department of Zoology, Dartmouth College, Hanover, the Department of Physiology, University of Cincinnati College of Medicine, Cincinnati, and the Mount Desert Island Cited by: Smith, Krogh, and Keys also knew that, as a consequence of these osmotic and ionic gradients, marine teleosts excrete a small volume of urine that is approximately isosmotic to the plasma, while freshwater teleosts produce large volumes of dilute urine (e.g., ).Cited by: FORSTER RP, BERGLUND F.

Osmotic diuresis and its effect on total electrolyte distribution in plasma and urine of the aglomerular teleost, Lophius americanus. J Gen Physiol. Jan 20; 39 (3)– [PMC free article] REHELL B. A rapid clinical method for Cited by: La fonction osmorégulatrice des poissons présente une extrême diversité liée tant à la variété Malvin, R.L.

and Vander, A.J. () Plasma renin activity in marine teleosts and Cetacea. Physiol. – W.H. () Parathyroid hormone preparations, Salmon calcitonin, and urine flow in the South American lungfish Cited by: with the osmotic gradient. If an average euryhaline teleost has a urine flow of 75 ml./kg.

fish/day in fresh water then it would be expected to have a flow of 50 ml./kg. fish/day in 10 % sea water.

Therefore Xiphister's low rate of urine flow 10 % in sea water indi-cates that this species is relatively impermeable to water. Table by: Also of interest in relation to active transport processes is the phenomenon of "osmotic " or "laboratory diuresis " which Lopkius and other marine teleosts exhibit spontaneously immediately after capture when the electrolytic composition of urine shifts radically as a concomitant of increased flow rates of water across Author: P.

Forster and Fredrik Berglund. Excretory rates of divalent ions in non-treated fish during standard laboratory conditions paralleled spontaneous changes in urine flow.

Tm rates of excretion were reached for magnesium, sulfate, and thiosulfate with corresponding plasma levels. Drinking in marine, euryhaline and freshwater teleost fish. a loop diuretic that inhibits Na⁺/K⁺/2Cl⁻ co-transporters, inhibited the absorptive Isc, and apical application of NPPB ( THE JOURNAL OF UROLOGY Vol.

73, No. 2, February Printed in U.S.A. URETERAL OBSTRUCTION IN THE AGLOMERULAR KIDNEY STAN WOOD S. SCHMIDT F St., Eureka, Calif.

Read at annual meeting, Western Section of American Urological Association, Victoria, B. Cited by: 2. urine/plasma urea concentration ratios in the glomerular marine teleosts. Since this group of fishes normally shows a rather low rate of urine flow, but develops a marked diuresis under the usual experimental con-ditions (Grafflin,; Pitts, ; Grafflin and Ennis, ; Clarke, ), the ability of the kidney to concentrate urea at.

Marine water teleost: Freshwater teleost: The seawater is hypertonic and thus, the water is moved out of the body tissues of teleost osmotically. The freshwater is hypotonic and thus the water moves in the tissues osmotically.

The teleost drinks more water and excrete very low amount of urine.The teleosts or Teleostei (Greek: teleios, "complete" + osteon, "bone") are by far the largest infraclass in the class Actinopterygii, the ray-finned fishes, and make up 96% of all extant species of ts are arranged into about 40 orders and 26, species have been described.

Teleosts range from giant oarfish measuring m (25 ft) or more, and ocean sunfish Class: Actinopterygii.

Terrestrial and marine environments pose similar challenges to water budget, but present quite different demands in terms of ion (Na + and Cl-1) trial mammals, particularly granivores and herbivores, can scarcely obtain Na + and Cl-1 from food and thus retain them in the body; however, marine teleosts have devised a machinery (the gill ionocytes) to excrete excess NaCI that Cited by: