Definition, Betydelse & Synonymer | Engelska ordet MYOFIBRIL

Definition av MYOFIBRIL

1. myofibrill

Exempel på hur man kan använda MYOFIBRIL i en mening

• A myofibril (also known as a muscle fibril or sarcostyle) is a basic rod-like organelle of a muscle cell.
• The nuclei of spindle muscle cells are located in the middle of these spindles, but unlike extrafusal muscle fibers, the myofibril contractile apparatus of spindle fibers are located only at both ends of spindle.
• Two factors contribute to hypertrophy: sarcoplasmic hypertrophy, which focuses more on increased muscle glycogen storage; and myofibrillar hypertrophy, which focuses more on increased myofibril size.
• One study investigated the relationship between flight muscle structure and the flies' flight capacity: as the number of mitochondria increased, myofibril diameter increased, and sarcomere length decreased, the researchers found the fly's flight capacity to be maximized.
• The encoded protein has been implicated in several pathologic processes, including myofibril necrosis in myopathies and in myocardial ischemia, and in the renal tubular response to proteinuria.
• It sensitizes and increases the binding efficiency of cardiac troponin in the myofibril to the calcium ions that are already present in systole.
• In vitro muscle testing can be done on any scale of muscle organization - entire groups of muscles (provided they share a common insertion or origin, as in the human quadriceps), a single muscle, a "bundle" of muscle fibers, a single muscle fiber, a single myofibril, a single sarcomere, a cardiomyocyte or even a half-sarcomere.
• This is done by the enzyme creatine phosphokinase which transduces energy from the transport molecule of phosphocreatine to the useful molecule for contraction demands, ATP, an action performed by ATPase in the myofibril.
• LPF is an infiltrative, poorly circumscribed tumor that on microscopic histopathological analysis consists of oval- or spindle-shaped fibroblast-like cells interspersed with muscle cells (as evidenced by the presence of the easily recognizable myofibril portions of muscle cells).

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