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人体各种形式的运动,主要是靠一些肌肉细胞的收缩活动来完成的。不同肌肉组织在结构和机能上各有其特点,但从分子水平来看,各种收缩活动主要与细胞内所含的收缩蛋白—主要是肌凝蛋白和肌动蛋白—的相互作用有关。根据骨骼肌微细结构的形态学研究,早在五十年代初期就提出了用肌小节中粗、细两种肌丝的相互滑行来说明肌肉的收缩。滑行现象的引起与组成肌丝的蛋白分子结构及其特性有直接关系。粗肌丝主要由肌凝蛋白(myosin)所组成,细
The body’s various forms of exercise, mainly by some contraction of muscle cells to accomplish. Different muscle tissues have their own characteristics in structure and function, but at the molecular level, various contractile activities are mainly related to the interaction of contractile proteins contained in cells, mainly myosin and actin. According to the morphological study of the skeletal muscle micro-structure, as early as the early 1950s, it was proposed to explain the muscle contraction by using the slippage between the coarse and fine myofilaments in the muscle segments. The gliding phenomenon is directly related to the structure and characteristics of protein molecules that make myofilaments. Thick myofilament is mainly composed of myosin (myosin), fine