青蛙缝匠肌的静息膜电位。
The resting membrane potential of frog sartorius muscle.
作者信息
Hironaka T, Morimoto S
出版信息
J Physiol. 1979 Dec;297(0):1-8. doi: 10.1113/jphysiol.1979.sp013024.
Abstract
- The absolute resting membrane potential of the frog sartorius muscle was determined in Ringer solution at 20 degrees C. 2. Membrane potentials were measured with 0.03, 0.1, 0.3, 1.0 and 3.0 M-KCl electrodes; potentials, including the micro-electrode-tip potentials, were -62.4, -75.7, -83.0, -87.7 and -90.7 mV respectively. 3. Membrane potentials were corrected for the liquid junction potentials between the Ringer and KCl solutions, and the myoplasm and the KCl solutions of the micro-electrodes, using the Henderson's liquid junction equation. 4. The cation (U) and anion (V) conductances of the myoplasm were adjusted to give a constant membrane potential after correction for liquid junction potentials. The final values for U and V were 5.6 and 1.3 mmho/cm respectively, resulting in a membrane potential of -93.0 mV. 5. The correction for the liquid junction potential was -2.6 mV when a 3 M-KCl micro-electrode was used.
摘要
- 在20摄氏度的林格氏液中测定青蛙缝匠肌的绝对静息膜电位。2. 用0.03、0.1、0.3、1.0和3.0 M - KCl电极测量膜电位；包括微电极尖端电位在内的电位分别为 - 62.4、- 75.7、- 83.0、- 87.7和 - 90.7 mV。3. 使用亨德森液体接界方程对林格氏液与KCl溶液之间以及肌浆与微电极的KCl溶液之间的液体接界电位进行膜电位校正。4. 在校正液体接界电位后，调整肌浆的阳离子（U）和阴离子（V）电导以获得恒定的膜电位。U和V的最终值分别为5.6和1.3毫姆欧/厘米，产生的膜电位为 - 93.0 mV。5. 当使用3 M - KCl微电极时，液体接界电位的校正值为 - 2.6 mV。
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