Differences in circadian time course and level for the plasma concentrations of glucose, free fatty acids and amino acids between ad lib‐eating and fasting rabbits
| Autor: | E.A. van der Biezen, A.C. Bobbert, W.Th.J.M. Hekkens, A.J.M. Hekkens |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
chemistry.chemical_classification
medicine.medical_specialty digestive oral and skin physiology Plasma levels Biology Amino acid Rhythm Endocrinology chemistry Internal medicine Blood plasma Plasma concentration Time course medicine General Earth and Planetary Sciences Hemoglobin Circadian rhythm General Agricultural and Biological Sciences General Environmental Science |
| Zdroj: | Journal of Interdisiplinary Cycle Research. 20:309-322 |
| ISSN: | 0022-1945 |
| DOI: | 10.1080/09291018909360019 |
| Popis: | The entrained rhythm in food approaches, representative of the circadian fluctuation in locomotor and food intake activity was recorded from 12 rabbits eating ad libitum during exposure to an LD 12:12 h‐regimen. They were also subjected to 53 h‐sessions with the same LD alternation, in which blood samples were taken at 2 h‐intervals. During these sessions 6 of them were permitted to eat freely whereas the others were food‐deprived. It appeared that in eating rabbits plasma levels are higher for glucose and a‐amino nitrogen but lower for free fatty acids and, further, that eating specimens exhibit marked circadian fluctuations in the levels of glucose and FFA which are closely correlated with, and probably a consequence of, the circadian rhythm in the amounts of food actually taken up in the course of the sessions. In fasting rabbits, however, the same plasma parameters show rhythms with quite another time course, that can be attributed to the circadian fluctuations in (locomotor) activity and end... |
| Databáze: | OpenAIRE |
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