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KMID : 0364219640070010023
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Korean Journal of Zoology
1964 Volume.7 No. 1 p.23 ~ p.28
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Changes of Rectal Temperature in Mice Exposed to Cold With and Without Restraint(1)
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Kim Chung-Chin
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Abstract
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120 mice of both sexes weighing from 18 to 22 g. were used. These mice were divided nito 12 groups : control (non-restraint and restraint) , acclinmation (non-restraint and restraint , acclimation for 5 and 10 days) , adrenalectomized (non-restraint and restraint0 and acclimation-adrenalectomized (non-restraint and restraint, acclimation for 5 and 10 days) groups. The rectal temperature of each group were measured at 10, 30 and 50 min under environment of 0℃.Measurements were done with a microphrometer of B.T.-32 thermocorpules. The results obtained may be summarized as follows : 1) The rectal temperature in normal mice without restraint was higher than that of normal mice with restraint under environment of 0℃. 2) The rectal temperature in normal mice was higher than that of adrenalectomized mice at 20℃. But the rectal temperature in adrenalectomized mice without restraint was higher than that of adrenalectomized mice with restraint under cold-stress. This difference was in the order of 1.65˚ under environment of 20˚ and 10˚ at 50 min under environment of 0˚. 3) The rectal temperature of normal mice with restraint was less than that of adrenalectomized mice (non-restraint) under cold-stress. 4) The rectal temperature of normal and adrenalectomized mice that acclimated under cold stress (0℃) for 5 and 10 days was usually higher than that of normal and adrenalectomized mice of non-acclimation under environment of 0℃. 5) The tolerance in mice under cold-stress was increased on the acclimtion of cold.
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KEYWORD
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