In the absence of external HCO3, resting membrane potentials (Vm) in extensor digitorum longus muscle were depolarized as compared to the normal Vm in the presence of HCO3. Removal of Na or Cl form the HCO3-free media induced repolarization. In muscle in HCO3 buffer at 20 degrees C, internal K, Na,
The normal membrane resting potential of mammalian skeletal muscle measured in vivo
โ Scribed by Bennett, A. L. ;Ware, F. ;Dunn, A. L. ;McIntyre, A. R.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1953
- Tongue
- English
- Weight
- 772 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0095-9898
No coin nor oath required. For personal study only.
โฆ Synopsis
The technique for direct measurement of the difference in potential between the inside and outside of single muscle cells was provided by Graham and Gerard ('46) when they first penetrated frog muscle cells with micro-electrodes consistiiig of extremely fine glass capillaries containing saline. Ling and Gerard ('49) described the preparation and use of such electrodes with a tip-diameter of less than 1 p and presented preliminary experiments in which the electrodes were filled with 3 molar instead of isotonic KCl. These authors and also Nastuk and Hodgkin ('50) have reported detailed studies on the resting and action potentials of frog muscle fibers. The same technique has been used by Nastuk
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