Metabolic pattern of sand rats (psammomys obesus) and rats during fasting
| Autor: | P.F. Kraicer, G. Frenkel |
|---|---|
| Rok vydání: | 1972 |
| Předmět: |
Blood Glucose
Male Glycosuria medicine.medical_specialty Time Factors Nitrogen Blood sugar General Biochemistry Genetics and Molecular Biology Excretion Oxygen Consumption Species Specificity Internal medicine parasitic diseases Respiration medicine Animals General Pharmacology Toxicology and Pharmaceutics biology Body Weight Temperature Fasting General Medicine Metabolism Carbon Dioxide Ketones biology.organism_classification Adaptation Physiological Diet Rats Endocrinology Blood chemistry Ketone bodies Psammomys Desert Climate medicine.symptom |
| Zdroj: | Life Sciences. 11:209-222 |
| ISSN: | 0024-3205 |
| Popis: | The thermoneutral zone of sand rats was 31 ± 1.5°C and that of rats was 30 ± 0.5°C; at 30°C the BMR was 0.52 ± 0.026 ml O 2 /g.hr for sand rat and 0.86 ± 0.019 for rat. During prolonged fasting O 2 consumption of sand rats fell during 36 hours and then rose to the fed value. CO 2 production fell with the onset of fasting and remained constant over 2 days. In the rat O 2 consumption did not change, whereas CO 2 production slowly fell. Changes in R.Q., corrected for non-protein nitrogen excretion, suggested a shift to fat catabolism in the rat but not in the sand rat. Changes in ketone body excretion and blood glucose concentrations support these conclusions. The difference in metabolism of these species probably reflects the adaptation of the sand rat to its desert habitat. |
| Databáze: | OpenAIRE |
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