温度对青蛙神经肌肉接头处自发和诱发量子大小的影响。
Temperature effects on spontaneous and evoked quantal size at the frog neuromuscular junction.
作者信息
Van der Kloot W, Cohen I S
出版信息
J Neurosci. 1984 Sep;4(9):2200-3. doi: 10.1523/JNEUROSCI.04-09-02200.1984.
The amplitudes, time integrals, and half-decay times of miniature endplate currents (MEPCs) and of endplate currents (EPCs) were measured in preparations in low Ca2+-high Mg2+ Ringer, in which the probability of the evoked release of more than one quantum was low. The measurements were made at 5 to 7, 11, and 15 degrees C. There is no consistent difference in these properties of evoked and spontaneously released quanta at any of the temperatures. I. S. Cohen and W. Van der Kloot ((1983) J. Physiol. (Lond.) 336: 335-344) compared the effects of temperature changes on MEPCs and on the endplate currents evoked by set amounts of iontophoretically applied ACh. The results suggested that the quantity of ACh/quantum was relatively unaffected by changes in temperature. This conclusion can now be extended to quanta released by nerve stimulation.
在低钙 - 高镁林格液制备的标本中测量微小终板电流（MEPCs）和终板电流（EPCs）的幅度、时间积分和半衰期，在这种标本中诱发释放多个量子的概率较低。测量在5至7、11和15摄氏度下进行。在任何温度下，诱发释放和自发释放量子的这些特性均无一致差异。I. S. 科恩和W. 范德克洛特（（1983年）《生理学杂志》（伦敦）336: 335 - 344）比较了温度变化对MEPCs和由设定量的离子电泳施加乙酰胆碱诱发的终板电流的影响。结果表明，每个量子的乙酰胆碱量相对不受温度变化的影响。这一结论现在可以扩展到神经刺激释放的量子。
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