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At least 397 records · Page 22Linked to original sources
PubMed1998

Influence of salt intake, ANG II synthesis and SFO lesion on thirst and blood pressure during sodium depletion. Subfornical organ.

Water intake was elevated in sodium-depleted rats during a daytime salt appetite test, but other rats drank a similar amount of water when saline was not available for drinking during the test. This water intake stimulated by sodium depletion was blocked by an inhibition of angiotensin (ANG) II synthesis with a high dose of captopril (100 mg/kg, sc). Captopril did not reduce water intake by causing hypotensive shock or uremia, because water and saline intakes were increased rather than decreased after a low dose of captopril (5 mg/kg) that also reduced blood pressure and elevated blood urea nitrogen. The water intake, but not salt appetite, induced by sodium depletion was greatly reduced by a lesion of the subfornical organ (SFO) in one-bottle tests, and this was not clearly related to any effects of the lesion on blood pressure. A physiological role for ANG II in water intake induced by sodium depletion has recently been disputed, but the simplest explanation for the data remains that elevated levels of circulating ANG II bind to receptors in the SFO to generate daytime water drinking during sodium depletion.

Angiotensin II↗
PubMed1986

Voluntary ethanol consumption in the absence of hunger and thirst drives.

Voluntary ethanol consumption in Wistar rats was examined in a choice situation between water and ethanol. In each session continuing over 5 days, ethanol at five different concentrations from 2.5 to 45% (v/v) and water were given as reinforcers for FR-30 lever-press responses during 12-h light and 12-h dark periods with food available. The results indicated that rats preferred 2.5-5% ethanol to water, but water to 30 or 45% ethanol. Daily net ethanol consumption per kg body weight increased monotonically as a function of its concentration and reached a mean value of 9.08 g/kg at 45%. Rats drank most of the ethanol and water during the dark period, despite the large amount of ethanol intake occurring at that time.

Alcohol Drinking↗