Shifts of thermoeffector thresholds in heat‐acclimated rats.
Shifts of thermoeffector thresholds in heat‐acclimated rats.
复制标题
热适应大鼠中热效应器阈值的变化。
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
T. Nagasaka
中科院分区：
文献类型：
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作者：
O. Shido;S. Sakurada;N. Sugimoto;T. Nagasaka
1. Heat‐acclimated (HA) rats, kept under a 12:12 h light‐dark regime, were subjected to an ambient temperature (Ta) of 33 degrees C for 5 h in the last half of the dark phase for 3 weeks. Control rats were kept under a 12:12 h light‐dark regime at a constant Ta of 24 degrees C. 2. After the acclimation period, the rats were then placed in a metabolic chamber at a Ta of 26.5 degrees C, and body core temperature was gradually increased and decreased using an intravenous thermode. Thermoeffector thresholds were determined by the hypothalamic temperature (T(hy)) at the onset of warm‐induced tail skin vasodilatation and cold‐induced thermogenesis measured by oxygen consumption. 3. Each rat was subjected to the experiment twice, once in the first half and once in the last half of the dark phase, on different days in random order. 4. In HA rats, T(hy) at the onset of both skin vasodilatation and thermogenesis were significantly lower in the last half of the dark phase compared with the first half. In control rats, however, there were no such differences between the two halves. 5. The results suggest that in rats acclimated to daily heat exposure, thermoeffector thresholds shift to lower temperatures only during the period of day when the rats had previously been exposed to heat.
出汗和皮肤血流量的昼夜节律。
DOI：
10.1152/ajpregu.1984.246.3.r321
发表时间：
1984
期刊：
The American journal of physiology
影响因子：
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作者：
Stephenson,LA;Wenger,CB;O'Donovan,BH;Nadel,ER
通讯作者：
Nadel,ER