Short-term changes in natripheric and hydrosmotic water fluxes across the skin and in urine production due to increases in the osmolarity of the external environment in the toad
1. 1. Sudden decreases in the osmotic gradient across the skin due to the replacement of water of the bath by 115mM NaCl had no effect on water uptake of intact or hypophysectomized toads. 2. 2. A concomitant decrease in the urine production was observed in intact but not in hypophysectomized animal...
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1987
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03009629_v88_n3_p571_Reboreda http://hdl.handle.net/20.500.12110/paper_03009629_v88_n3_p571_Reboreda |
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paper:paper_03009629_v88_n3_p571_Reboreda |
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paper:paper_03009629_v88_n3_p571_Reboreda2023-06-08T15:27:46Z Short-term changes in natripheric and hydrosmotic water fluxes across the skin and in urine production due to increases in the osmolarity of the external environment in the toad amiloride acclimatization animal article comparative study drug effect functions of the skin and its appendages hypophysectomy hypothalamus kidney male physiology reference value skin absorption toad Acclimatization Amiloride Animal Bufo arenarum Comparative Study Hypophysectomy Hypothalamus, Middle Kidney Male Reference Values Skin Absorption Skin Physiology Support, Non-U.S. Gov't 1. 1. Sudden decreases in the osmotic gradient across the skin due to the replacement of water of the bath by 115mM NaCl had no effect on water uptake of intact or hypophysectomized toads. 2. 2. A concomitant decrease in the urine production was observed in intact but not in hypophysectomized animals. 3. 3. Addition of amiloride chlorydrate (0.25 mM) to the 115mM NaCl bath induced a significant decrease in water uptake both in intact and in hypophysectomized toads. 4. 4. The osmotic permeability coefficient (LPD) increased significantly during the osmotic gradient reduction with 115mM NaCl plus 0.25mM amiloride or 230 mM sucrose in both groups. 5. 5. No changes in the plasmatic osmolarity were detected during the development of these responses to the osmotic gradient reduction. 6. 6. These results are consistent with the hypothesis of short-term changes in the natripheric and hydrosmotic fluxes of water across the skin and in urine production triggered by the osmotic gradient reduction. The possible participation of arginine vasotocin in these responses is discussed. © 1987. 1987 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03009629_v88_n3_p571_Reboreda http://hdl.handle.net/20.500.12110/paper_03009629_v88_n3_p571_Reboreda |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
amiloride acclimatization animal article comparative study drug effect functions of the skin and its appendages hypophysectomy hypothalamus kidney male physiology reference value skin absorption toad Acclimatization Amiloride Animal Bufo arenarum Comparative Study Hypophysectomy Hypothalamus, Middle Kidney Male Reference Values Skin Absorption Skin Physiology Support, Non-U.S. Gov't |
| spellingShingle |
amiloride acclimatization animal article comparative study drug effect functions of the skin and its appendages hypophysectomy hypothalamus kidney male physiology reference value skin absorption toad Acclimatization Amiloride Animal Bufo arenarum Comparative Study Hypophysectomy Hypothalamus, Middle Kidney Male Reference Values Skin Absorption Skin Physiology Support, Non-U.S. Gov't Short-term changes in natripheric and hydrosmotic water fluxes across the skin and in urine production due to increases in the osmolarity of the external environment in the toad |
| topic_facet |
amiloride acclimatization animal article comparative study drug effect functions of the skin and its appendages hypophysectomy hypothalamus kidney male physiology reference value skin absorption toad Acclimatization Amiloride Animal Bufo arenarum Comparative Study Hypophysectomy Hypothalamus, Middle Kidney Male Reference Values Skin Absorption Skin Physiology Support, Non-U.S. Gov't |
| description |
1. 1. Sudden decreases in the osmotic gradient across the skin due to the replacement of water of the bath by 115mM NaCl had no effect on water uptake of intact or hypophysectomized toads. 2. 2. A concomitant decrease in the urine production was observed in intact but not in hypophysectomized animals. 3. 3. Addition of amiloride chlorydrate (0.25 mM) to the 115mM NaCl bath induced a significant decrease in water uptake both in intact and in hypophysectomized toads. 4. 4. The osmotic permeability coefficient (LPD) increased significantly during the osmotic gradient reduction with 115mM NaCl plus 0.25mM amiloride or 230 mM sucrose in both groups. 5. 5. No changes in the plasmatic osmolarity were detected during the development of these responses to the osmotic gradient reduction. 6. 6. These results are consistent with the hypothesis of short-term changes in the natripheric and hydrosmotic fluxes of water across the skin and in urine production triggered by the osmotic gradient reduction. The possible participation of arginine vasotocin in these responses is discussed. © 1987. |
| title |
Short-term changes in natripheric and hydrosmotic water fluxes across the skin and in urine production due to increases in the osmolarity of the external environment in the toad |
| title_short |
Short-term changes in natripheric and hydrosmotic water fluxes across the skin and in urine production due to increases in the osmolarity of the external environment in the toad |
| title_full |
Short-term changes in natripheric and hydrosmotic water fluxes across the skin and in urine production due to increases in the osmolarity of the external environment in the toad |
| title_fullStr |
Short-term changes in natripheric and hydrosmotic water fluxes across the skin and in urine production due to increases in the osmolarity of the external environment in the toad |
| title_full_unstemmed |
Short-term changes in natripheric and hydrosmotic water fluxes across the skin and in urine production due to increases in the osmolarity of the external environment in the toad |
| title_sort |
short-term changes in natripheric and hydrosmotic water fluxes across the skin and in urine production due to increases in the osmolarity of the external environment in the toad |
| publishDate |
1987 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03009629_v88_n3_p571_Reboreda http://hdl.handle.net/20.500.12110/paper_03009629_v88_n3_p571_Reboreda |
| _version_ |
1768545925336137728 |