Effects of Dehydration on Metabolic Rate and Fluid Distribution in the Jackrabbit, Lepus californicus
| Autor: | Howard Haines, James B. Reese |
|---|---|
| Rok vydání: | 1978 |
| Předmět: |
biology
Physiology Chemistry Body water chemistry.chemical_element Fluid compartments medicine.disease biology.organism_classification Oxygen Endocrinology Animal science Lepus californicus Biochemistry Weight loss Physiology (medical) Extracellular fluid medicine Animal Science and Zoology Dehydration medicine.symptom Water content |
| Zdroj: | Physiological Zoology. 51:155-165 |
| ISSN: | 0031-935X |
| DOI: | 10.1086/physzool.51.2.30157863 |
| Popis: | Chronic water restriction resulted in a 30% decrease in metabolic rate and an over 50% decrease in evaporative loss in jackrabbits with no change in body temperature. Thus, evaporative cooling as a means of maintaining body temperature was minimized. Accommodation to measuring technique may account for part of the decrease in O₂ consumption. Fractional water content increased, and solids decreased associated with a 10.6% weight loss due to chronic restriction, whereas plasma and extracellular volume decreased in proportion to weight loss. The biological half-life of water, T½, was increased from 5.8 to 11.6 days while water exchange decreased from 13.0% to 5.9% of the body water per day. In acutely dehydrated jackrabbits (3-5 days without water at 25 C), all body fluid compartments lost equal proportions (10.7%) with no change in metabolic rate. Similarly, oxygen consumption was unaffected, and plasma volume decreased in proportion to weight loss (5.5%) in jackrabbits acutely dehydrated in hyperthermic co... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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