ABSTRACT
The membrane of locust skeletal muscle fibres is permeable to both potassium and chloride ions in the resting state and has a potassium selectivity similar to that of a potassium electrode (Usherwood, 1967). The experiments described here were performed on the isolated retractor unguis muscle of the locust Schistocerca gregaria. The composition of the standard locust saline was similar to that of Hoyle (1953) except that in most experiments the HPO4/HCO3 buffer was replaced by Tris-maleate (pH 6·8). Conventional electrophysiological techniques were used and electrodes had tip potentials of less than 5 mV.
© 1986 by Company of Biologists
1986
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