Experiments were performed to ascertain whether food intakein thirsty rats is influenced by palatability of solutions andwhether the availability of food during tests influences tastepreference, acceptance, and total fluid intake. In five groups ofrats, 2-bottle preference (Experiment 1) and 1-bottle acceptancetests (Experiment 2) in either 12, 24, 36, 48 h water deprived ratswere performed; food was available during tests. Results showedthat food availability during tests did not affect taste preferenceand acceptance. In Experiment1, after 36, 48 h water deprivation,rats drinking either NaCl or sucrose, they ate less food than ratsdrinking either HCl, quinine, or water. In Experiment 2, ratsdrinking NaCl as the only source of fluid ate significantly lessfood than all other groups. Two different post-ingestive effects(energetic; osmotic) may explain the same behavior for intake ofsucrose or NaCl solutions. Since rats drinking either sucrose orNaCl ate less food but drank more fluid, they had a fluid/foodratio significantly higher than that of rats drinking either water,quinine, or HCl; these latters ate more food but drank less fluid.Taste, together with other factors, might inhibit or enhance theamount of fluid and food intake required to restore body weightand body fluid osmolality at the end of dehydration. Duringrecovery periods, overeating is necessary to restore body mass,Na+ and electrolytes; overdrinking corrects imbalance producedby excessive eating. In conclusion, food and fluid intake appearssignificantly related each other, even in dehydrated rats.
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|Data di pubblicazione:||2007|
|Autori:||G. Scalera; C. Benassi; A. Bigiani|
|Titolo:||Sapid solutions and food intake in repeated dehydration andrehydration periods in rats|
|Appare nelle tipologie:||Abstract in Atti di Convegno|
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