Gulati J, Reisin I L
Science. 1972 Jun 9;176(4039):1139-41. doi: 10.1126/science.176.4039.1139.
Sodium-rich frog muscles are found to extrude sodium and reaccumulate potassium at 0 degrees C. The uptake of potassium by these muscles is studied at three different temperatures as a function of external potassium concentration, K(ex). The steady-state potassium content of the tissue is related to K(ex). by a sigmoidal cooperative curve at all temperatures. These results are compared with findings on a mammalian smooth muscle.
研究发现，富含钠的青蛙肌肉在0摄氏度时会排出钠并重新积累钾。在三个不同温度下，研究了这些肌肉对钾的摄取量与外部钾浓度K（ex）的关系。在所有温度下，组织的稳态钾含量与K（ex）呈S形协同曲线关系。将这些结果与对哺乳动物平滑肌的研究结果进行了比较。
