myofibril

(redirected from Myofibrils)
Also found in: Thesaurus, Medical, Encyclopedia.

my·o·fi·bril

 (mī′ə-fī′brəl, -fĭb′rəl)
n.
Any of the threadlike fibrils that make up the contractile part of a striated muscle fiber and are made up chiefly of actin and myosin filaments.

myofibril

(ˌmaɪəˈfaɪbrəl)
n
(Biology) one of cylindrical organelles found in muscle fibre

my•o•fi•bril

(ˌmaɪ əˈfaɪ brəl, -ˈfɪb rəl)

n.
a contractile fibril of skeletal muscle, composed mainly of actin and myosin.
[1895–1900]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.myofibril - one of many contractile filaments that make up a striated muscle fiber
sarcoplasm - the cytoplasm of a striated muscle fiber
striated muscle cell, striated muscle fiber - an elongated contractile cell in striated muscle tissue
sarcomere - one of the segments into which a myofibril is divided
fibril, filament, strand - a very slender natural or synthetic fiber
Translations

my·o·fi·bril

n. miofibrilla, fibrilla diminuta delgada del tejido muscular.
References in periodicals archive ?
Significant mitochondrial edemas in the degradation blanks were also observed in 36[degrees]C group (Picture (2); 1 h, C), and the most serious degration of myofibrils was found in 36[degrees]C HS group (Picture (3); 2 h).
This increased weight of carcass may be due to the protection of glycogen reservoirs due to the extra supplementation of CHO in the pectoris muscle which is needed in the multiplication of myofibrils in this area.
The structural basis for such a contraction process is derived from the highly ordered lattice structure of myofibrils of muscle fibers.
"Muscle is made up of protein strands or myofibrils so eating quality protein is key when it comes to building muscle," she says.
Chapman (1978) described the tentacle musculature of the Tripedalia cystophora cubopolyp as smooth longitudinal epitheliomuscular cells but noted the presence of striated myofibrils near the distal tip of the tentacles.
However, when the CHD4 protein is absent, non-cardiac muscle proteins are inappropriately produced in developing heart muscle cells, forming abnormal, hybrid myofibrils that lack the functional properties of a normal heart.
(Mc Ardle et al.2010, Garrett and Kirkendall 2000) Along with muscle hypertrophy, the number of myofibrils and mitochondria increase intensively, and the phosphagen system develops.
The morphology of the EDL muscle from the CTL group exhibited sarcoplasm with the presence of well-defined myofibrils and an organized Z-line (Fig.
Cruz-Hofling & Rodrigues-Simioni (1998) observed a reduction in the number of synaptic vesicles following the morphological alterations in the myofibrils and mitochondria using guanidine.
In every muscle cell there are so-called myofibrils, which contract at the same time.
Lesions in WMD are mediated by oxidative damage to cell membranes, which allows extracellular calcium to flow into the damaged cells, causing activation of calcium-dependent proteases that then degrade myofibrils and other cellular components, leading to myodegeneration and myonecrosis (COOPER & VALENTINE, 2016).
[2] Theoretically, V[O.sub.2]max is a point where oxygen cost of active myofibrils under certain work reaches the intracellular physiometabolic leveling in establishing balance between oxygen volume required to oxidation metabolism and V[O.sub.2] consumed in mitochondrial chemical reactions so that increasing work intensity does not raise consumption oxygen of active myofibrils.