Further studies on the influence of ions on the muscle fibre resting potential in the cricket Acheta domesticus.
Experiments were carried out on tergosternal muscle fibres of the house cricket Acheta domesticus. Conventional microelectrode methods were used. All the investigated fibres depolarized with time (0, 60, 120 min) in statistically significant manner. Replacing CL- in the physiological solution by carbonate prevents this depolarization. Citrate anions added to the bath depolarize the fibers. Acetate does not change the resting potential. Increasing osmolarity by adding 100 or 200 mM saccharose exerts no significant influence on the level of the resting potential. Lowering the level of sodium ions leads to a slight but significant depolarization. The present work confirmed the opinion that skeletal muscle fibers of Acheta domesticus are at rest multiionic electrodes.
D000085:Acetates / Q000494:pharmacology; D000818:Animals; D002254:Carbonates / Q000494:pharmacology; D002712:Chlorides / Q000502:physiology; D002951:Citrates / Q000494:pharmacology; D066298:In Vitro Techniques; D007313:Insecta / Q000502:physiology*; D007477:Ions; D008564:Membrane Potentials; D009132:Muscles / Q000378:metabolism / Q000502:physiology*; D009994:Osmolar Concentration; D012964:Sodium / Q000502:physiology
D000085:Acetates; D002254:Carbonates; D002712:Chlorides; D002951:Citrates; D007477:Ions; D012964:Sodium