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Abstract:

1. Toads maintained in fresh water and submitted periodically to careful manipulation showed higher urine production than water uptake, and body weight loss. 2. After complete removal of the ADH (antidiuretic hormone) secreting system, animals developed polyuria without changes in water uptake, and extreme body weight loss. 3. Small lesions of the midbrain midtegmental area caused a stable and copious intake of water across the skin, polyuria, negative water balance and body weight loss. A similar but temporary increase in water uptake, combined with oliguria, and a gain of body weight was observed during the reversible coma induced by blocking the same region of the midbrain with a microinjection of 3 M KCl, in both normal and hypophysectomized toads. 4. General anesthesia with urethan reproduced closely the picture of polyuria and high water intake due to midbrain lesion in normal as well as in hypophysectomized animals. 5. We postulate an extrahypophyseal nervous mechanism that controls the influx of water across the skin and urine production in the toad, with its focus in the midbrain midtegmental area. © 1982 Springer-Verlag.

Registro:

Documento: Artículo
Título:Role of the CNS in the control of the water economy of the toad Bufo arenarum Hensel - I. Effects of handling, brain lesions, anesthesia and reversible coma upon water uptake, urine production and overall water balance
Autor:Segura, E.T.; Bandsholm, U.C.; Bronstein, A.; Woscoboinik, D.
Filiación:Laboratorio de Fisiología del Comportamiento, Instituto de Biologia y Medicina Experimental, Obligado 2490, Buenos Aires, 1428, Argentina
Año:1982
Volumen:146
Número:1
Página de inicio:95
Página de fin:100
DOI: http://dx.doi.org/10.1007/BF00688721
Título revista:Journal of Comparative Physiology ■ B
Título revista abreviado:J Comp Physiol B
ISSN:01741578
CODEN:JCPBD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01741578_v146_n1_p95_Segura

Referencias:

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  • Ambalavanar, S., Foster, R.W., Schnieden, H., Effects of sympathomimetics on water movement across toad isolated bladder (1972) J Pharm Pharmacol, 24, pp. 501-502
  • Bakker, H.R., Bradshaw, S.D., Effect of hypothalamic lesions on water metabolism of the toad Bufo marinus (1977) J Endocrinol, 75, pp. 161-172
  • Bentley, P.J., The effects of neurohypophysial extracts on water transfer across the wall of the isolated urinary bladder of the toad Bufo marinus (1958) Journal of Endocrinology, 17, pp. 201-209
  • Bentley, P.J., (1971) Endocrines and osmoregulation, pp. 201-209. , Springer, Berlin Heidelberg New York
  • Bentley, P.J., Inhibition by dopamine of the hydro-osmotic response (water transfer) of the toad bladder to vasopressin (1972) J Pharmacol Exp Ther, 181, pp. 155-160
  • Claussen, D.L., Urinary bladder water reserves in the terrestrial toad, Bufo fowleri and the aquatic frog, Rana clamitans (1974) Herpetologica, 30, pp. 360-365
  • Ewer, R.F., The effect of pituitrin on fluid distribution in Bufo regularis Reuss (1952) J Exp Biol, 29, pp. 173-177
  • Ginsburg, M., Brown, L.M., The effects of haemorrhage and plasma hypertonicity on the neurohypophysis (1957) The neurohypophysis, p. 109. , H., Heller, Butterworths, London
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  • Porter, K.P., (1972) Herpetology, , Saunders, Philadelphia
  • Ripoche, P., Bourguet, J., Parisi, M., The effect of hypertonic media on water permeability of frog urinary bladder. Inhibition by catecholamines and prostaglandin E<inf>1</inf> (1973) The Journal of General Physiology, 61, pp. 110-124
  • Ruibal, R., The adaptive value of bladder water in the toad, Bufo cognatus (1962) Physiol Zool, 35, pp. 218-223
  • Sawyer, W.H., Effects of posterior pituitary extracts on urine formation and glomerular circulation in the frog (1951) Am J Physiol, 164, pp. 457-466
  • Sawyer, W.H., Increased renal reabsortion of osmotically free water by the toad, Bufo marinus, in response to neurohypophysial hormones (1957) Am J Physiol, 189, pp. 564-568
  • Shoemaker, V.H., Waring, H., Effect of hypothalamic lesions on the water-balance response of a toad (Bufo marinus) (1968) Comp Biochem Physiol, 24, pp. 47-54
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Citas:

---------- APA ----------
Segura, E.T., Bandsholm, U.C., Bronstein, A. & Woscoboinik, D. (1982) . Role of the CNS in the control of the water economy of the toad Bufo arenarum Hensel - I. Effects of handling, brain lesions, anesthesia and reversible coma upon water uptake, urine production and overall water balance. Journal of Comparative Physiology ■ B, 146(1), 95-100.
http://dx.doi.org/10.1007/BF00688721
---------- CHICAGO ----------
Segura, E.T., Bandsholm, U.C., Bronstein, A., Woscoboinik, D. "Role of the CNS in the control of the water economy of the toad Bufo arenarum Hensel - I. Effects of handling, brain lesions, anesthesia and reversible coma upon water uptake, urine production and overall water balance" . Journal of Comparative Physiology ■ B 146, no. 1 (1982) : 95-100.
http://dx.doi.org/10.1007/BF00688721
---------- MLA ----------
Segura, E.T., Bandsholm, U.C., Bronstein, A., Woscoboinik, D. "Role of the CNS in the control of the water economy of the toad Bufo arenarum Hensel - I. Effects of handling, brain lesions, anesthesia and reversible coma upon water uptake, urine production and overall water balance" . Journal of Comparative Physiology ■ B, vol. 146, no. 1, 1982, pp. 95-100.
http://dx.doi.org/10.1007/BF00688721
---------- VANCOUVER ----------
Segura, E.T., Bandsholm, U.C., Bronstein, A., Woscoboinik, D. Role of the CNS in the control of the water economy of the toad Bufo arenarum Hensel - I. Effects of handling, brain lesions, anesthesia and reversible coma upon water uptake, urine production and overall water balance. J Comp Physiol B. 1982;146(1):95-100.
http://dx.doi.org/10.1007/BF00688721