Body Temperature Regulation
Mostrando 1-12 de 38 artigos, teses e dissertações.
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1. Dependencia térmica de la salamandra endémica de Colombia Bolitoglossa ramosi (Caudata, Plethodontidae)
ABSTRACT Environmental temperature is a determining factor in the physiological and behavioral processes of amphibians because they are ectotherms and consequently depend on external heat sources to achieve optimal body temperatures. The aim of this study was to determine the thermal dependence of the Colombian endemic salamander Bolitoglossa ramosi Brame &
Iheringia, Sér. Zool.. Publicado em: 05/09/2016
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2. Thermal ecology and thermoregulatory behavior of Coleodactylus natalensis (Squamata: Sphaerodactylidae), in a fragment of the Atlantic forest of northeastern, Brazil
We studied the thermal ecology and thermoregulatory behavior of Coleodactylus natalensis Freire, 1999 in a remnant of a northern coastal patch of the Brazilian Atlantic Forest. Data were collected during four 20-day field excursions over the course of one year. We assessed the importance of substrate and air temperatures, in addition to time of exposure to s
Zoologia (Curitiba). Publicado em: 2011-12
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3. Respostas termorregulatórias de meninas pré-puberes magras e obesas que pedalam em condição termoneutra e de calor
Crianças frequentemente realizam atividades físicas em ambientes quentes. O calor pode afetar o desempenho, conforto subjetivo, tolerância ao exercício e ser preocupante para a saúde. Além disso, parece que crianças obesas, comparadas com as magras, apresentam desvantagens ao se exercitarem no calor. Devido à importância do exercício aeróbio para
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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4. Cementos óseos acrílicos modificados con hidroxiapatita/acetato de vinilo: caracterización mecánica, termoanálitica y bioactividad in vitro
Bone cements have become biomaterials of great utility in the prosthesis fixation and as substitutes to the bone. The objective of this study is to evaluate the thermo analytical properties such as setting time and peak temperature of polymerization of acrylic bone cement modified with hydroxyapatite/vinyl acetate, to determine the compression strengths and
Polímeros. Publicado em: 07/05/2010
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5. Thermoregulation and activity pattern of the high-mountain lizard Phymaturus palluma (Tropiduridae) in Chile
Behavioral and physiological mechanisms of thermoregulation in ectotherms are conditioned by thermal constraints. These mechanisms may be even more restrictive when environmental conditions are unfavorable for individuals, especially when sexual dimorphism segregates the sexes spatially. In order to understand behavioral and physiological regulation mechanis
Zoologia (Curitiba). Publicado em: 2010-02
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6. Does gestation or feeding affect the body temperature of the golden lancehead, Bothrops insularis (Squamata: Viperidae) under field conditions?
Temperature affects physiological performance in reptiles and, therefore, body temperature (Tb) control is argued to have an important adaptive value. Alterations in Tb due to transient changes in physiological state, as during digestion or gestation, are often linked to the potential benefits of a more precise Tb regulation. However, such thermoregulatory r
Zoologia (Curitiba). Publicado em: 2010
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7. Participação do óxido nítrico na expressão de vasopressina e ocitocina durante sepse polimicrobiana experimental / Involvement of nitric oxide in vasopressin and oxytocin expression during experimental polymicrobial sepsis.
Sepsis induces massive production of inflammatory mediators, such as nitric oxide (NO), and causes cardiovascular, neuroendocrine and body temperature (Tb) alterations. In the late phase of sepsis there is a basal vasopressin (AVP) release despite the persisting hypotension. One reason could be the inhibition of AVP synthesis by the increase in NO production
Publicado em: 2009
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8. Effects of heat stress on mammalian reproduction
Heat stress can have large effects on most aspects of reproductive function in mammals. These include disruptions in spermatogenesis and oocyte development, oocyte maturation, early embryonic development, foetal and placental growth and lactation. These deleterious effects of heat stress are the result of either the hyperthermia associated with heat stress o
The Royal Society.
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9. Leptin actions on food intake and body temperature are mediated by IL-1
Leptin regulates energy balance through its actions in the brain on appetite and energy expenditure and also shares properties with cytokines such as IL-1. We report here that leptin, injected into rats intracerebroventricularly or peripherally, induces significant dose-dependent increases in core body temperature as well as suppression of appetite. Leptin f
The National Academy of Sciences.
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10. Central role for differential gene expression in mammalian hibernation.
Mammalian hibernators experience dramatic reductions in body temperature, metabolic rate, respiratory rate, and heart rate during hibernation. These changes are precisely controlled and reversible with only internally driven mechanisms, suggesting specific biochemical regulation. We present a model that integrates our observations of differential liver gene
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11. The central role of corticotrophin-releasing factor (CRF-41) in psychological stress in rats.
1. We investigated the central role of corticotrophin-releasing factor (CRF-41) in psychological stress-induced responses, including cardiovascular, thermoregulatory and locomotive activity in free-moving rats. 2. Psychological stress was induced by cage-switch stress. After rats were placed in the novel environment, blood pressure, heart rate, body temperat
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12. Neurovestibular modulation of circadian and homeostatic regulation: Vestibulohypothalamic connection?
Chronic exposure to increased force environments (+G) has pronounced effects on the circadian and homeostatic regulation of body temperature (Tb), ambulatory activity (Act), heart rate, feeding, and adiposity. By using the Brn 3.1 knockout mouse, which lacks vestibular hair cells, we recently described a major role of the vestibular system in mediating some
National Academy of Sciences.