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Potassium intake during cell dehydration.

Daniela T B Pereira1, Richard B David, Regina C Vendramini

  • 1Department of Physiology and Pathology, School of Dentistry, Rua Humaitá, 1680, Paulista State University (UNESP), 14801-903, Araraquara, São Paulo, Brazil.

Physiology & Behavior
|May 17, 2005
PubMed
Summary

Cell dehydration in rats prompts mineral intake beyond sodium chloride (NaCl). Rats preferred potassium chloride (KCl) over other solutions, indicating dehydration-induced mineral appetite is not specific to NaCl.

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Area of Science:

  • Physiology
  • Neuroscience
  • Behavioral Science

Background:

  • Cell dehydration is known to stimulate water intake.
  • Previous studies suggest sodium chloride (NaCl) intake increases during dehydration.

Purpose of the Study:

  • To investigate if mineral intake in cell-dehydrated rats is specific to NaCl.
  • To determine the influence of available mineral solutions on intake preferences during cell dehydration.

Main Methods:

  • Adult male Sprague Dawley rats were subjected to cell dehydration via intravenous NaCl infusion.
  • Rats had simultaneous access to distilled water and four mineral solutions (KCl, CaCl2, NaHCO3, NaCl) in a five-bottle test.
  • Mineral solution intakes were recorded following dehydration.

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Main Results:

  • NaCl concentration-dependent increase in 0.01 M KCl intake was observed.
  • KCl intake was significantly preferred over other minerals when solutions were isomolar (0.15 M).
  • Dehydration did not induce a preference for palatable or isomolar solutions early after furosemide injection.

Conclusions:

  • Mineral intake induced by cell dehydration is not specific to NaCl.
  • The type of available mineral solution significantly influences intake choice.
  • Potassium chloride (KCl) emerged as the preferred solution for cell-dehydrated rats in this study.