Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1969 Mar;53(3):279-97.
doi: 10.1085/jgp.53.3.279.

Ionic conductances of the surface and transverse tubular membranes of frog sartorius fibers

R S Eisenberg, P W Gage

Ionic conductances of the surface and transverse tubular membranes of frog sartorius fibers

R S Eisenberg et al. J Gen Physiol. 1969 Mar.

Abstract

The resting ionic conductances of frog sartorius muscle fibers have been determined in a variety of conditions in order to measure the potassium conductance of the tubular and surface membranes (gK(t) and gK(s)) and the chloride conductance of the tubular and surface membranes (gCl(t) and gCl(s)). In both normal fibers and fibers without tubules, measurements of input resistance and diameter were made at normal pH and at low pH when the chloride conductance was very small. These measurements permitted the separation of the ionic conductances: gCl(s) = 219 micromhos/cm(2); gCl(t) = 0 micromhos/cm(2); gK(s) = 28 micromhos/cm(2); gK(t) = 55 micromhos/cm(2). Possible sources of systematic error are discussed and a statistical analysis of the effects of random error is presented. The implications of the nonuniformity of membrane properties are discussed along with possible anatomical explanations.

PubMed Disclaimer

References

    1. J Gen Physiol. 1967 Nov;50(10):2437-58 - PubMed
    1. J Cell Biol. 1968 Mar;36(3):497-526 - PubMed
    1. J Physiol. 1960 Sep;153:370-85 - PubMed
    1. Nature. 1964 Jun 13;202:1067-71 - PubMed
    1. J Physiol. 1964 Dec;175:275-94 - PubMed