HEAT-LOSS REGULATION - ROLE OF APPENDAGES AND TORSO IN THE DEER MOUSE AND THE WHITE-RABBIT
HEAT-LOSS REGULATION - ROLE OF APPENDAGES AND TORSO IN THE DEER MOUSE AND THE WHITE-RABBIT
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DOI：
10.1007/bf00684671
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发表时间：
1985-01-01
影响因子：
2
通讯作者：
PORTER, WP
中科院分区：
文献类型：
--
作者：
CONLEY, KE;PORTER, WP
通过对鹿鼠和白色兔的传热分析，将热导率细分为肢体和躯干的分量热导率。兔子该分析基于皮肤温度和呼吸气体交换的实验室测量，所述呼吸气体交换是在空气温度为8 - 10 ℃之间进行的。34.degree. C为鹿鼠，并从公布的数据为白色兔。对每个附肢和躯干的两个系列热传递传导进行了评价：内部（hin），用于血液流动和组织传导到皮肤表面，外部（hex），用于从皮肤表面到环境的热损失。这2个系列电导以单个总电导（htot）表示。通过hex设定htot限值，两只动物的躯干htot均达到该限值。观察到小鼠躯干htot随气温升高而增加，表明发生了皮毛深度的变化。通过每个附件的铰链将htot控制在hex设定的限值以下。小鼠热传导（C）的升高是由于足、尾和躯干htot的增加。家兔在5 °-10 °之间的躯干htot没有变化。30.degree. C和耳htot专门增加C超过这些空气温度。据报告，家兔体温过高为35 ℃。C是由于C达到了由躯干和接近十六进制设定的物理极限。耳朵单独调节兔子C，而脚、尾巴和躯干有助于小鼠C的调节。
Thermal conductance was subdivided into the component conductances of the appendages and torso using a heat transfer analysis for the deer mouse, P. maniculatus, and the white rabbit, O. cuniculus. The analysis was based on laboratory measurements of skin temperature and respiratory gas exchange made between air temperatures of 8.degree.-34.degree. C for the deer mouse, and from published data for the white rabbit. Two series conductances to heat transfer for each appendage and torso were evaluated: internal (hin), for blood flow and tissue conduction to the skin surface, and external (hex), for heat loss from the skin surface to the environment. These 2 series conductances were represented in a single, total conductance (htot). The limit to htot was set by hex and was reached by the torso htot of both animals. The increase in torso htot observed with air temperature for the mouse suggests that a pilomotor change in fur depth occurred. A control of htot below the limit set by hex was achieved by the hin of each appendage. Elevation of mouse thermal conductance (C) resulted from increases in feet, tail, and torso htot. The rabbit showed no change in torso htot between 5.degree.-30.degree. C and ear htot exclusively increased C over these air temperatures. The hyperthermia reported for the rabbit at 35.degree. C resulted from C reaching the physical limit set by torso and near hex. The ear alone adjusted rabbit C, whereas the feet, tail and the torso contributed to the adjustment of mouse C.