心肌在钡离子挛缩状态下对阶跃性张力降低的瞬时长度反应。

Transient length responses of heart muscle in Ba2+-contracture to step tension reductions.

作者信息

Saeki Y, Shibata T, Sato C, Yanagisawa K

出版信息

Adv Exp Med Biol. 1984;170:841-3. doi: 10.1007/978-1-4684-4703-3_82.

Abstract

The transient length response of the cat papillary muscle in Ba2+-contracture to step tension reduction was found to comprise four different phases. It is tentatively suggested that the transient response is mostly determined by the kinetics of the attachment and detachment of cross-bridges between actin and myosin filaments, which vary appreciably with activation level of the muscle.

摘要

发现在 Ba2+ 收缩时猫乳头肌对阶跃张力降低的瞬态长度响应包括四个不同阶段。初步认为，瞬态响应主要由肌动蛋白丝和肌球蛋白丝之间横桥附着和脱离的动力学决定，而这会随肌肉激活水平发生显著变化。