Blood volume regulation in dehydrated rodents: Plasma colloid osmotic pressure, total osmotic pressure and electrolytes

M. Horowitz*, A. Borut

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

1. 1. Plasma colloid osmotic pressure of dehydrated Acomys cahirinus increased 26·8 per cent above value in normal A. cahirinus. In dehydrated Rattus norvegicus and Meriones crassus the colloid osmotic pressure decreased by 16·5 and 12 per cent respectively. 2. 2. The total osmotic pressure increased in all three species. 3. 3. The increase in total osmotic pressure of dehydrated R. norvegicus and M. crassus was due to the increase in electrolyte concentrations. No increase in sodium and chloride concentrations were measured in A. cahirinus. The increase in colloid osmotic pressure found in this mouse after dehydration was not large enough to explain the increase in total osmotic pressure. 4. 4. The role of plasma colloid osmotic pressure in blood volume regulation in the three species is discussed.

Original languageEnglish
Pages (from-to)1261-1265
Number of pages5
JournalComparative Biochemistry and Physiology -Part A : Molecular and Integrative Physiology
Volume44
Issue number4
DOIs
StatePublished - 1 Apr 1973

Keywords

  • Acomys cahirinus
  • blood volume regulation
  • dehydration
  • desert rodents
  • Meriones crassus
  • plasma chloride
  • Plasma colloid osmotic pressure
  • plasma electrolytes
  • plasma osmotic pressure
  • plasma sodium
  • Rattus norvegicus

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