Calcium transients evoked by action potentials in frog twitch muscle fibres

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RESUMO

1. Intracellular Ca2+ transients were recorded from frog twitch muscle fibres in response to action potentials and repetitive stimulation, using ionophoretically injected arsenazo III as a Ca2+ monitor. A dual wave-length optical system was used to measure absorbance changes of the injected dye from small areas of single fibres within the cutaneous pectoris muscle.

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