The contribution of Na+ ions to the nonsynaptic electrogenesis was studied in the larval muscle fibers of mealworm, Tenebrio molitor, using currentclamp and voltage‐clamp techniques. Na‐dependent graded responses were generated by depolarizing current stimuli in Ca2+‐free solutions. These responses were insensitive to tetrodotoxin and were blocked by Co2+. Large inward‐going currents were elicited by step depolarizations in Ca2+‐free solutions under voltage‐clamp conditions. The inward currents were totally eliminated by removal of Na+ from the bathing solution. These results indicate that the calcium channel of mealworm muscle is permeable to Na+.
|ジャーナル||Archives of Insect Biochemistry and Physiology|
|出版ステータス||Published - 1987 8月|
ASJC Scopus subject areas