Results 211 to 220 of about 1,789,342 (255)
Ca2+ release from sarcoplasmic reticulum of skinned fast- and slow-twitch muscle fibers
American Journal of Physiology-Cell Physiology, 1988 We have performed a comparative study of Ca2+ release from the sarcoplasmic reticulum (SR) of chemically skinned fibers from rabbit fast- and slow-twitch skeletal muscle. Ca2+ fluxes have been indirectly monitored by following either tension development or the inhibition of net Ca2+-loading rate by a light-scattering method.
SALVIATI G., VOLPE, POMPEO
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Contraction of glycerinated rabbit slow-twitch muscle fibers as a function of MgATP concentration
American Journal of Physiology-Cell Physiology, 1992 We have measured the isometric tension and force-velocity relationships of glycerinated rabbit slow-twitch semimembranosus muscle as a function of MgATP concentration ([MgATP]) and have compared the results with those obtained previously from fast-twitch psoas muscle. We find that isometric tension decreases as [MgATP] increases.
E, Pate +3 more
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The fast-twitch muscle calsequestrin isoform predominates in rabbit slow-twitch soleus muscle [PDF]
FEBS Letters, 1989 The major form of calsequestrin in rabbit slow-twitch soleus muscle is shown to be identical to that isolated and cloned from rabbit fast-twitch muscle on the following bases: identity of cDNAs cloned from mRNAs from the two muscle sources; equivalent ...
Larry Fliegel +2 more
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Fine structure of fast‐twitch and slow‐twitch guinea pig muscle fibers
Journal of Morphology, 1973AbstractThe guinea pig soleus muscle is a convenient model for the study of slow‐twitch intermediate (STI) fiber ultrastructure because it is composed entirely of fibers of this class. Such fibers were compared with fast‐twitch red (FTR) and fast‐twitch white (FTW) fibers from the vastus lateralis muscle.FTW fibers are characterized by small, sparse ...
R J, Tomanek +3 more
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Calcium sensitivity of fast‐and slow‐twitch human muscle fibers
Muscle & Nerve, 1989AbstractMuscle fibers from the lateral gastrocnemius muscles of five normal adult males were chemically skinned (sarcolemma disrupted) and each fiber was divided into two parts for histochemical determination of fiber type and calcium‐induced tension measurements. The calcium concentration associated with half‐maximal tension was 2.5 μM for fast‐twitch
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Chemico-Biological Interactions, 2005
The presence of a collagenous protein (ColQ) characterizes the collagen-tailed forms of acetylcholinesterase (AChE) and butyrylcholinesterase at vertebrate neuromuscular junctions, which is tethered in the synaptic basal lamina. ColQ subunits, differing mostly by their signal sequences, are encoded by transcripts ColQ-1 and ColQ-1a, which are ...
Ting, Annie +3 more
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The presence of a collagenous protein (ColQ) characterizes the collagen-tailed forms of acetylcholinesterase (AChE) and butyrylcholinesterase at vertebrate neuromuscular junctions, which is tethered in the synaptic basal lamina. ColQ subunits, differing mostly by their signal sequences, are encoded by transcripts ColQ-1 and ColQ-1a, which are ...
Ting, Annie +3 more
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Resting tension characteristics in differentiating intact rat fast- and slow-twitch muscle fibers
Journal of Applied Physiology, 2003The postnatal changes in resting muscle tension were investigated at 20°C by using small muscle fiber bundles isolated from either the extensor digitorum longus or the soleus of both neonatal (7–21 days old) and adult rats. The results show that the tension-extension characteristics of the bundles depended on the age of the rats. For example, both the
Mutungi, Gabriel +2 more
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Mechanical efficiency of fast- and slow-twitch muscle fibers in man during cycling
Journal of Applied Physiology, 1979The influence of different percentages of slow-twitch (ST) and fast-twitch (FT) fibers in vastus lateralis on delta efficiency expressed by delta work (x)/delta energy liberation (y) in y = a + bx was studied in six subjects during cycling on an ergometer at 60 or 100 rpm at work loads below 80% of VO2max.
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International Journal of Psychophysiology, 1993
17 right-handed males volunteered for an experiment that compared task-related patterns of electromyographic (EMG) activation with data from muscle biopsy on proportion of slow-twitch ((ST) aerobic) to fast-twitch ((FT) anaerobic) muscle fibers. The biopsy was taken from the right-leg gastrocnemius muscle after EMG measurement from that area of the leg
S, Svebak +5 more
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17 right-handed males volunteered for an experiment that compared task-related patterns of electromyographic (EMG) activation with data from muscle biopsy on proportion of slow-twitch ((ST) aerobic) to fast-twitch ((FT) anaerobic) muscle fibers. The biopsy was taken from the right-leg gastrocnemius muscle after EMG measurement from that area of the leg
S, Svebak +5 more
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Nutrition, 2022
Skeletal muscle accounts for 80% of whole body insulin-stimulated glucose uptake, and it plays a key role in preventing and curing obesity and insulin resistance (IR). Vitamin K2 (VK2) plays a beneficial role in improving mitochondrial function through SIRT1 signaling in high-fat diet (HFD)-induced mice and palmitate acid (PA)-treated C2C12 cells.
Xiangni, Su +4 more
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Skeletal muscle accounts for 80% of whole body insulin-stimulated glucose uptake, and it plays a key role in preventing and curing obesity and insulin resistance (IR). Vitamin K2 (VK2) plays a beneficial role in improving mitochondrial function through SIRT1 signaling in high-fat diet (HFD)-induced mice and palmitate acid (PA)-treated C2C12 cells.
Xiangni, Su +4 more
openaire +2 more sources