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A sarcomere is defined as the segment between two neighbouring Z-lines (or Z-discs). In electron micrographs of cross-striated muscle, the Z-line (from the German "zwischen" meaning between) appears in between the I-bands as a dark line that anchors the actin myofilaments. Surrounding the Z-line is the region of the I-band (for isotropic ).
Anatomical terms of microanatomy. [ edit on Wikidata] A myofibril (also known as a muscle fibril or sarcostyle) [1] is a basic rod-like organelle of a muscle cell. [2] Skeletal muscles are composed of long, tubular cells known as muscle fibers, and these cells contain many chains of myofibrils. [3] Each myofibril has a diameter of 1–2 ...
Long interspersed nuclear elements ( LINEs) [1] (also known as long interspersed nucleotide elements [2] or long interspersed elements [3]) are a group of non-LTR ( long terminal repeat) retrotransposons that are widespread in the genome of many eukaryotes. [4] [5] LINEs contain an internal Pol II promoter to initiate transcription into mRNA ...
Sliding filament theory: A sarcomere in relaxed (above) and contracted (below) positions. The sliding filament theory explains the mechanism of muscle contraction based on muscle proteins that slide past each other to generate movement. [1] According to the sliding filament theory, the myosin ( thick filaments) of muscle fibers slide past the ...
Short interspersed nuclear elements ( SINEs) are non-autonomous, non-coding transposable elements (TEs) that are about 100 to 700 base pairs in length. [1] They are a class of retrotransposons, DNA elements that amplify themselves throughout eukaryotic genomes, often through RNA intermediates. SINEs compose about 13% of the mammalian genome.
Adenosine Deaminase Severe Combined Immunodeficiency (ADA-SCID) ADHD in Children. Adult Vaccines. Aganglionic Megacolon. Agenesis of Commissura Magna Cerebri. Agenesis of Corpus Callosum. Age ...
Myofilament. Myofilaments are the three protein filaments of myofibrils in muscle cells. The main proteins involved are myosin, actin, and titin. Myosin and actin are the contractile proteins and titin is an elastic protein. The myofilaments act together in muscle contraction, and in order of size are a thick one of mostly myosin, a thin one of ...
Use gauze or a dry sponge to apply pressure over the site for about 30 seconds to a minute. Don’t massage the site, as this can cause irritation. Properly dispose of the needle and wash your ...