Effects of activity on some physiological properties of skeletal muscles

1983 ◽  
pp. 33-38 ◽  
Author(s):  
G. Vrbová
Keyword(s):  
Skeletal Muscles ◽  
Physiological Properties

Comparison of immunochemical and histochemical analysis of fibre type distribution in ovine skeletal muscles

2002 ◽  
Vol 2002 ◽  
pp. 175-175 ◽  
Author(s):  
A. Q. Sazili ◽  
T. Parr ◽  
P. L. Sensky ◽  
S.W. Jones ◽  
R.G. Bardsley ◽  
...  
Keyword(s):  
Myosin Heavy Chain ◽  
Heavy Chain ◽  
Skeletal Muscles ◽  
Fibre Types ◽  
Muscle Fibres ◽  
Histochemical Analysis ◽  
Fast Myosin ◽  
Physiological Properties ◽  
Fibre Type Distribution ◽  
Fast Myosin Heavy Chain

The characterisation of muscle fibres has become increasingly important as the proportion of slow and fast fibre types are known to influence the biochemical and physiological properties of muscle during postmortem tenderisation (Ouali and Talmant, 1990). Current histochemical methods are labour intensive, time consuming and hazardous, requiring rapid freezing of samples in isopentane cooled in liquid nitrogen. The purpose of this study was to investigate an alternative immunochemical approach for identifying fibre types by examining the expression of slow myosin heavy chain (MHC-s) and fast myosin heavy chain (MHC-f) and comparing the data with classical histochemical techniques. Five different ovine skeletal muscles with known differences in fibre types distribution were studied.

GRAVITY-DEPENDENT VARIABILITY OF PHYSIOLOGICAL PROPERTIES OF MAMMALIAN SKELETAL MUSCLES

1981 ◽  
pp. 105-111
Author(s):  
V.S. Oganov ◽  
A.N. Potapov ◽  
S.A. Skuratova ◽  
M.A. Shirvinskaya
Keyword(s):  
Skeletal Muscles ◽  
Physiological Properties

Specificity and Plasticity of Mammalian Skeletal Muscles

2000 ◽  
Vol 16 (1) ◽  
pp. 98-109 ◽  
Author(s):  
Walter Herzog ◽  
Timothy Koh ◽  
Evelyne Hasler ◽  
Tim Leonard
Keyword(s):  
Skeletal Muscle ◽  
Musculoskeletal System ◽  
Skeletal Muscles ◽  
Neuromuscular System ◽  
Moment Arm ◽  
Mechanical Perturbation ◽  
Neuromuscular Adaptation ◽  
Physiological Properties ◽  
Effective Function

We hypothesize that the neuromuscular system is designed to function effectively in accomplishing everyday movement tasks. Since everyday movement tasks may vary substantially in terms of speed and resistance, we speculate that agonistic muscles contribute differently to varying movement tasks such that the mechanical, structural, and physiological properties of the system are optimized at all times. We further hypothesize that a mechanical perturbation to the musculoskeletal system, such as the loss of an important joint ligament or the change of a muscle’s line of action, causes an adaptation of the system aimed at reestablishing effective function. Here. we demonstrate how the specificity of the cat ankle extensors is used to accommodate different locomotor tasks. We then illustrate how the loss of an important ligament in the cat knee leads to neuromuscular adaptation. Finally, we discuss the adaptability of skeletal muscle following an intervention that changes a muscle’s line of action, moment arm, and excursion.

Distribution of c-protein isoforms in sarcomeres of developing chick skeletal muscle

1988 ◽  
Vol 46 ◽  
pp. 226-227
Author(s):  
D. A. Fischman ◽  
J. E. Dennis ◽  
T. Obinata ◽  
H. Takano-Ohmuro
Keyword(s):  
Skeletal Muscles ◽  
Thick Filament ◽  
Protein Isoforms ◽  
Actin Binding ◽  
Striated Muscles ◽  
C Protein ◽  
Sarcomeric Protein ◽  
Thick Filaments ◽  
Cross Bridges ◽  
Bridge Bearing

C-protein is a 150 kDa protein found within the A bands of all vertebrate cross-striated muscles. By immunoelectron microscopy, it has been demonstrated that C-protein is distributed along a series of 7-9 transverse stripes in the medial, cross-bridge bearing zone of each A band. This zone is now termed the C-zone of the sarcomere. Interest in this protein has been sparked by its striking distribution in the sarcomere: the transverse repeat between C-protein stripes is 43 nm, almost exactly 3 times the 14.3 nm axial repeat of myosin cross-bridges along the thick filaments. The precise packing of C-protein in the thick filament is still unknown. It is the only sarcomeric protein which binds to both myosin and actin, and the actin-binding is Ca-sensitive. In cardiac and slow, but not fast, skeletal muscles C-protein is phosphorylated. Amino acid composition suggests a protein of little or no αhelical content. Variant forms (isoforms) of C-protein have been identified in cardiac, slow and embryonic muscles.

The effect of ionophore A23178 on the α-actinin crosslinks in the z-band of frog skeletal muscle: An EM study

1986 ◽  
Vol 44 ◽  
pp. 154-155
Author(s):  
F.T. Llados ◽  
V. Krlho ◽  
G.D. Pappas
Keyword(s):  
Muscle Damage ◽  
Transmitter Release ◽  
Skeletal Muscles ◽  
Calcium Uptake ◽  
Muscle Membrane ◽  
Frog Skeletal Muscle ◽  
Ach Release ◽  
Sustained Action ◽  
Calcium Deposits ◽  
Intense Stimulation

It Is known that Ca++ enters the muscle fiber at the junctional area during the action of the neurotransmitter, acetylcholine (ACh). Pappas and Rose demonstrated that following Intense stimulation, calcium deposits are found In the postsynaptic muscle membrane, Indicating the existence of calcium uptake In the postsynaptic area following ACh release. In addition to this calcium uptake, when mammal Ian skeletal muscles are exposed to a sustained action of the neurotransmitter, muscle damage develops. These same effects, l.e., Increased transmitter release, calcium uptake and finally muscle damage, can be obtained by Incubating the muscle with lonophore A23178.

Comparative Morphology of Skeletal Muscles in Man and Macaque

1993 ◽  
Vol 5 (2) ◽  
pp. 137-146
Author(s):  
Seiichiro INOKUCHI ◽  
Tadanao KIMURA ◽  
Masataka SUZUKI ◽  
Junji ITO ◽  
Hiroo KUMAKURA
Keyword(s):  
Skeletal Muscles ◽  
Comparative Morphology

IDENTIFICATION AND CHARACTERIZATION OF A PURPLE NONSULFUR BACTERIUM ISOLATED FROM COASTAL AREA OF HAI PHONG FOR USING IN PRODUCTION OF UNSATURATED FATTY ACID (OMEGA 6, 7, 9)

2019 ◽  
Vol 57 (6) ◽  
pp. 665 ◽  
Author(s):  
Yen Thi Hoang ◽  
Quynh Thi Thu Tran ◽  
Ha Hoang Chu ◽  
Tuyen Thi Do ◽  
Thanh Tat Dang ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Unsaturated Fatty Acid ◽  
Unsaturated Fatty Acids ◽  
Nitrogen Sources ◽  
16S Rrna Analysis ◽  
Rhodovulum Sulfidophilum ◽  
Purple Nonsulfur Bacterium ◽  
High Lipid ◽  
Physiological Properties ◽  
Omega 6

Purple nonsulfur bacteria are a group that has so much biotechnological applications, particularly in producing of functional food rich with unsaturated fatty acids. A purple nonsulfur bacterium (named HPB.6) was chosen based on its strong growth, high lipid and synthesis of unsaturated fatty acid (omega 6,7,9). Studying on basic biological characteristics showed that the cells of HPB.6 were observed as ovoid-rod shape, none motility, Gram negative staining. The diameter of single bacterium was about 0.8-1.0 µm. The cells divide by binary fission and had bacteriochlorophyll a (Bchl a). This bacterium grew well on medium with carbon and nitrogen sources such as acetate, succinate, pyruvate, butyrate, glutamate, arginine, leucine, tyrosine, alanine, methionine, threonine, glutamine, yeast extract and NH4Cl. This selected strain grew well on medium with salt concentrations from 1.5 - 6.0% (optimum 3%), pH from 5.0 to 8.0 (optimum at pH 6.5) and could withstand Na2S at 4.0 - 5.2 mM. Based on morphological, physiological properties and 16S rRNA analysis received demonstrated that HPB.6 strain belongs to the species Rhodovulum sulfidophilum.

2482-PUB: Circadian Clock Regulates Fuel Metabolism in Skeletal Muscles

Diabetes ◽  
2019 ◽  
Vol 68 (Supplement 1) ◽  
pp. 2482-PUB
Author(s):  
JIDONG LIU ◽  
ZHENG SUN
Keyword(s):  
Circadian Clock ◽  
Skeletal Muscles ◽  
Fuel Metabolism
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