Harada E, Kanno T
J Appl Physiol. 1975 Mar;38(3):389-94. doi: 10.1152/jappl.1975.38.3.389.
The role of the rabbit's ear in cold acclimation was studied by varying the temperature of a climatic room in the range from -10 to +30 degrees C; The skin temperature in a nonanesthetized rabbit's ear showed a characteristic response to changes in ambient temperatures; plotting the ear temperature against the ambient temperature yielded an S-shaped curve. The mean ambient temperature corresponding to the inflection point on the S-shaped curve shifted significantly from about 13 degrees C to about 8 degrees C after cold acclimated of a group fed for 7 wk at -10 degrees C. The shift of the S-shaped curve after cold acclimation may not be due to the change in the norepinephrine sensitivity of the vascular beds of the ear: the effect of norepinephrine on the pressure-flow curve in the isolated rabbit's ear was almost unchanged between the control and the cold-acclimated groups. It is proposed that the shift of the inflection point gives a qualitative index of the acclimated state of the rabbit at a particular temperature.
通过在-10至+30摄氏度范围内改变气候室的温度，研究了兔耳在冷适应中的作用；未麻醉兔耳的皮肤温度对环境温度变化表现出特征性反应；将耳温与环境温度作图得到一条S形曲线。在-10摄氏度下饲养7周的一组兔子冷适应后，S形曲线上拐点对应的平均环境温度从约13摄氏度显著移至约8摄氏度。冷适应后S形曲线的移动可能不是由于兔耳血管床去甲肾上腺素敏感性的变化：在对照组和冷适应组之间，去甲肾上腺素对离体兔耳压力-流量曲线的影响几乎没有变化。有人提出，拐点的移动给出了兔子在特定温度下适应状态的定性指标。
