Circadian locomotor activity in the Virginia opossum
نویسندگان
چکیده
منابع مشابه
Circadian rhythms of locomotor activity in Drosophila.
Drosophila is by far the most advanced model to understand the complex biochemical interactions upon which circadian clocks rely. Most of the genes that have been characterized so far were isolated through genetic screens using the locomotor activity rhythms of the adults as a circadian output. In addition, new techniques are available to deregulate gene expression in specific cells, allowing t...
متن کاملLocomotory energetics and metabolic fuel reserves of the Virginia opossum.
Marsupials have lower resting metabolic rates than placental mammals, but it is not clear whether particular species can extend this energetic advantage to locomotion. Some active marsupials have a low cost of locomotion, but other more sedentary species, such as the Virginia opossum, appear to run very inefficiently. Steady-state rates of O2 consumption (VO2) and CO2 production (VCO2) were mea...
متن کاملCoupling effect of locomotor activity on the rat's circadian system.
Exercise is recognized to affect circadian rhythmicity in a variety of ways. It masks the expression of other behavioral and physiological rhythms, entrains the master pacemaker, and influences the free-running period of other rhythms. In this paper we study the influence of exercise on the organization of the timing system by analyzing the effect of voluntary locomotor activity on the circadia...
متن کاملA Peptidergic Circuit Links the Circadian Clock to Locomotor Activity.
The mechanisms by which clock neurons in the Drosophila brain confer an ∼24-hr rhythm onto locomotor activity are unclear, but involve the neuropeptide diuretic hormone 44 (DH44), an ortholog of corticotropin-releasing factor. Here we identified DH44 receptor 1 as the relevant receptor for rest:activity rhythms and mapped its site of action to hugin-expressing neurons in the subesophageal zone ...
متن کاملEnergy metabolism of the Virginia opossum during fasting and exercise.
Rates of oxygen consumption and CO(2) production were measured in Virginia opossums (Didelphis virginiana) during fasting and prolonged exercise to quantify changes in total energy expenditure and oxidative fuel selection. We hypothesized that fasting would cause metabolic depression and a progressive shift towards lipid utilization to spare alternative substrates. It was also predicted that pr...
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ژورنال
عنوان ژورنال: Bulletin of the Psychonomic Society
سال: 1973
ISSN: 0090-5054
DOI: 10.3758/bf03333322