Na/Ca exchange and first messenger Ca in skeletal muscle excitation-contraction coupling.

Abstract

Depolarization initiates a process in the wall of the transverse tubular system (t system). This process gives rise to a transient electrical signal - charge movement - which is closely linked to the release of Ca from the sarcoplasmic reticulum (SR) via the foot process. Two types of linkage have been discussed at this Conference: 1) structural links spanning the t-SR gap, such as the rigid rod model (Schneider and Chandler, 1973), and 2) chemical links including trigger Ca (Bianchi, 1969 and Frank, 1980).KeywordsSarcoplasmic ReticulumCharge MovementFrog Skeletal MuscleSarcolemmal VesicleInflux PeriodThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.