Mechanics and energetics of contraction in striated muscle of the sea scallop, Placopecten magellanicus

The Journal of Physiology
J A Rall

Abstract

1. Mechanics and energetics of contraction in the striated adductor muscle of the sea scallop, Placopecten magellanicus, were determined and compared to a more conventional muscle preparation, the semitendinosus muscle of the frog, Rana pipiens. Experiments were conducted at 10 degrees C. 2. Scallop and frog striated muscle exhibited similar isometric twitch kinetics, heat coefficients (ratio of force produced to energy liberated), and twitch to tetanus ratios. 3. There were significant differences between scallop and frog muscle in that scallop muscle demonstrated a 30% lower isometric force, an inability to maintain force during a tetanus, and a transient decrease in economy of force development in a twitch after a tetanus, i.e. a decrease in the isometric heat coefficient.

Citations

Mar 5, 2003·Journal of Molecular Biology·Fa-Qing Zhao, Roger Craig
Feb 11, 2003·Journal of Structural Biology·Fa-Qing Zhao, Roger Craig
Jul 1, 2008·Journal of Molecular Biology·Fa-Qing Zhao, Roger Craig
Apr 30, 2014·PloS One·Michelangelo von DassowLance A Davidson
Feb 23, 2012·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Emiliano CèFabio Esposito
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