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A sarcomere (Greek σάρξ sarx "flesh", μέρος meros "part") is the smallest functional unit of striated muscle tissue. [1] It is the repeating unit between two Z-lines. Skeletal muscles are composed of tubular muscle cells (called muscle fibers or myofibers) which are formed during embryonic myogenesis .
The names of the various sub-regions of the sarcomere are based on their relatively lighter or darker appearance when viewed through the light microscope. Each sarcomere is delimited by two very dark colored bands called Z-discs or Z-lines (from the German zwischen meaning between). These Z-discs are dense protein discs that do not easily allow ...
Structure of muscle fibre showing a sarcomere under electron microscope with schematic explanation. Diagram of sarcoplasmic reticulum with terminal cisternae and T-tubules . Skeletal muscle exhibits a distinctive banding pattern when viewed under the microscope due to the arrangement of two contractile proteins myosin , and actin – that are ...
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Why does the last section repeated spell the word "sacromere" instead of "sarcomere?" The opening phrase should give context: "In anatomy..." might be right but I won't interfere. --Wetman 19:46, 28 Mar 2005 (UTC)
Donald Trump on Monday shared a ruthless highlight reel of Democrats in denial over Joe Biden's cognitive decline after a veteran journalist slammed US media for not making it a bigger story.
Huxley had used X-ray diffraction to speculate that muscle proteins, particularly myosin, form structured filaments giving rise to sarcomere (a segment of muscle fibre). Their main aim was to use electron microscopy to study the details of those filaments as never done before. They soon discovered and confirmed the filament nature of muscle ...
A food safety expert weighs in on flour bugs, also known as weevils, that can infest your pantry after one TikToker found her flour infested with the crawlers.