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myofibril

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myofibril /myo·fi·bril/ (-fi´bril) muscle fibril; one of the slender threads of a muscle fiber, composed of numerous myofilaments. myofi´brillar
my·o·fi·bril (m-fbrl, -fbrl)
n.
One of the threadlike longitudinal fibrils occurring in a skeletal or cardiac muscle fiber. Also called sarcostyle.

myofibril
[-fī′bril]
Etymology: Gk, mys + L, fibrilla, small fiber
a slender striated strand within skeletal and cardiac muscle fibers and composed of bundles of myofilaments. Myofibrils occur in groups of branching threads running parallel to the cellular long axis of the fiber.

myofibril [mi″o-fi´bril]
one of the slender threads of a muscle fiber, composed of numerous myofilaments; called also muscle fibril. adj., adj myofi´brillar.
Bundles of myofibrils in a muscle. From Damjanov, 2000.

myofibril
a muscle fibril, one of the slender threads of a muscle fiber, composed of numerous myofilaments.


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In addition, selenium deficiency can cause a painful myopathy with thinned myofibrils, vacuolization without fibrosis, and mitochondrial abnormalities.
Kinetic studies The main role of different isoenzymes of CK in cardiac muscle is to form a 'creatine shuttle', which means that the ATP synthesized in the mitochondrial matrix is used by MtCK for the synthesis of PCr in the mitochondrial intermembrane space to form a new energy-rich phosphoryl product; PCr then enters the cytoplasm and is transported to the myofibril by a facilitated diffusion mechanism.
When this happens our bodies will repair damage by adding new muscle tissue, increasing the number and size of myofibrils per muscle fiber, increasing the number of contractile proteins (actin and myosin), and increase the enzymes and stored nutrients within the cells, thus causing the size of the muscle cells to increase.
 
 
 
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