Charge movements near the mechanical threshold in skeletal muscle of Rana temporaria.
AUTOR(ES)
Adrian, R H
RESUMO
Charge movement was investigated over a range of potentials close to the mechanical threshold in voltage-clamped frog skeletal muscle. The delayed (q gamma) component of the charging currents appeared with a time course lasting well over 100 ms at around -50 to -40 mV, but the currents became larger and faster with further depolarization. The slow charging current was investigated using a 10 mV probe step intercepting the time course of these currents. This procedure showed that the charging currents could last as long as 100-300 ms. The total charge was conserved when the charging current was small and prolonged. The results can be related directly to earlier findings concerning contractile activation of muscle by applied voltage steps to potentials near threshold ( Adrian , Chandler & Hodgkin, 1969).
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1199350Documentos Relacionados
- Analysis of 'off' tails of intramembrane charge movements in skeletal muscle of Rana temporaria.
- Fast charge movements in skeletal muscle fibres from Rana temporaria
- Experimental analysis of the relationship between charge movement components in skeletal muscle of Rana temporaria.
- Stilbene disulphonates inhibit apparently separate chloride transporters in skeletal muscle of Rana temporaria.
- The pH dependence of chloride net flux in skeletal muscle fibres of Rana temporaria.
