DAILY TORPOR IN THE LABORATORY MOUSE, MUS-MUSCULUS VAR ALBINO
DAILY TORPOR IN THE LABORATORY MOUSE, MUS-MUSCULUS VAR ALBINO
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DOI：
10.1086/physzool.52.2.30152564
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发表时间：
1979-01-01
期刊：
影响因子：
--
通讯作者：
SCOTT, IM
中科院分区：
文献类型：
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作者：
HUDSON, JW;SCOTT, IM
测定了M.肌原变种随意喂养的白化病是不稳定的，在36 ° C和36 ° C之间变化。.+-. 0.3.degree.和39.3 °。.+-. 0.3.degree.在2.5 - 38.0 ℃的环境温度（Ta）下，C.热中性O2消耗为1.47 ml O2/g·cm-1。h，这发生在31 ℃的较低临界温度之间。上临界温度为35 ℃。C.热导率从0.26 ml O2/g·cm-1的高值降低。h.cntdot.温度降低到0.15ml O2/g h·cnt·dot。随着Ta从31 ℃降低到2.5 ℃，C.电导率从热中性区的下限增加到上限，达到最大值0.43 ml O2/g·cm-1。h.cntdot.在Ta为35 ℃时，C.最高电导率为0.74 ml O_2/g·cm ~（-1）。h.cntdot.在Ta为38 ℃时，C. Tre的不稳定性随着每日食物配给的限制而增加，平均为34.5 ° C。.+-. 0.3.degree. C，范围为22. 37度。在Ta为19 - 20 ℃时，C.在14只自由采食的动物中，5只在禁食后24小时内变得迟钝。在进入麻木状态期间，产热似乎受到抑制，这归因于颤抖的减少。迟钝小鼠的临界Tre为16 - 19 ℃。C.在Tre为31 ℃时，O2消耗与Tre直接相关。C和更高，但它保持在31 ℃之间的Tre相对恒定。16度。C.当Ta低于16 ℃时，Tre-Ta梯度和迟钝小鼠的O2消耗增加。C.在23 ° C和25 ° C之间，休眠期的长度与Ta呈负相关。16度。但在Ta低于16 ℃时经常被自发觉醒中断。C.在唤醒过程中，在一个特定的Tre的O2消耗量大于相应的Tre在进入麻木。觉醒经常伴随着代谢高峰，其次是减少三分之一和O2消耗量下降。唤醒率范围为0.11 ° C。C和0.25 ° C。C/min，似乎是独立的唤醒发生的Ta。迟钝的动物在体温达到18.5度之前不能直立、站立和颤抖。C.它们能在24.5 ℃的温度下收集和摄取种子。当Tre高于26 ℃时，其行为与常温动物相似。C.
The body temperature (Tre) of M. musculus var. albino fed ad lib was labile and varied between 36.degree. .+-. 0.3.degree. and 39.3.degree. .+-. 0.3.degree. C at ambient temperatures (Ta) ranging from 2.5-38.0.degree. C. The thermal neutral O2 consumption was 1.47 ml O2/g .cntdot. h, which occurred between the lower critical temperature of 31.degree. C and the upper critical temperature of 35.degree. C. The thermal conductance decreased from a high of 0.26 ml O2/g .cntdot. h .cntdot. .degree.C to a low of 0.15 ml O2/g h .cntdot. .degree.C as the Ta decreased from 31-2.5.degree. C. The conductance increased from the lower to the upper limits of the thermal neutral zone, reaching a maximum of 0.43 ml O2/g .cntdot. h .cntdot. .degree.C at a Ta of 35.degree. C. The highest conductance was 0.74 ml O2/g .cntdot. h .cntdot. .degree.C at a Ta of 38.degree. C. The lability of Tre increased with a restriction of the daily food ration, averaging 34.5.degree. .+-. 0.3.degree. C and ranged between 22.degree. and 37.degree. C at Ta of 19-20.degree. C. Of 14 animals on ad lib food allotments, 5 became torpid within 24 h after food was withheld. Heat production appeared to be suppressed during entry into torpor, which was attributed to a reduction in shivering. The critical Tre of torpid mice was 16-19.degree. C. O2 consumption was directly related to Tre at a Tre of 31.degree. C and above, but it remained relatively constant at Tre between 31.degree. and 16.degree. C. The Tre-Ta gradient and O2 consumption of torpid mice increased at Ta below 16.degree. C. The length of the torpor period was inversely related to Ta between 23.degree. and 16.degree. C but was frequently interrupted with spontaneous arousals at a Ta below 16.degree. C. During arousal, the O2 consumption at a particular Tre was greater than at the corresponding Tre during entry into torpor. Arousal was frequently accompanied by a metabolic peak, followed by a decrease of Tre and a decline in O2 consumption. The arousal rate ranged between 0.11.degree. C and 0.25.degree. C/min and appeared to be independent of the Ta at which arousal took place. Torpid animals could not right themselves, stand and shiver until their Tre reached 18.degree. C. They could gather and ingest seeds at a Tre of 24.degree. C and behaved similarly to normothermic animals when the Tre was above 26.degree. C.