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THE theory that injured skeletal muscle can regenerate by the formation of new cells although still disputed1 has strong support2–4. New muscle fibres are held to develop from multinucleate "myotubes" which are formed either by the budding of damaged muscle fibres or more probably by the ...
Fibres are surrounded by the sarcolemma comprising cell membrane overlayed with endomysial connective tissue (Aguilera and Stanley, 1990). Sign in to download full-size image Sign in to download full-size image Fig. 8.1. (a) Hierarchy of structures in plants (using material from Jackman and ...
Adenosine triphosphase activity and release of associated proteins by p-chloro- mercuriphenylsulfonate. J. Biol. Chem. 245:219-224. Sjostrom, M., D. Lexell and K. Larsen-Henriksson. 1981. Distribution of different fibres in m. vastus lateralis. Panamerican Congress and Int. Course on Sports...
The active proteins of contraction are myosin and actin, which are supported in this role by titin and under the control of the regulatory proteins, troponin and tropomyosin. The main molecular motor of muscle is myosin, which by interacting and binding with actin within muscle cells (or fibres...
MyHC isoforms IIa, IIx and IIb are specific to fast twitch skeletal muscles such as the TA and they each confer distinct metabolic and functional properties to skeletal muscle fibres [89]. Furthermore, skeletal muscle can adapt rapidly to metabolic changes induced by exercise, which can be refle...
However, no study has investigated if there are fibre-type-specific changes to the proteome that depend on the nature of the exercise stimulus. The size principle states that type I fibres are mostly utilised at lower exercise intensities, whereas type II fibres are increasingly recruited at ...
However, it can be concluded that children respond to exercise with enhanced oxygen utilization within the myocyte compared with adults and that their responses are consistent with a greater recruitment of type I muscle fibres. Changes in muscle metabolism are age, maturation- and sex-related and ...
which are bipolar cells with their cell bodies in the spiral ganglion lying parallel to the organ of Corti within the bone. Some efferent fibres from the contralateral olivary nucleus are distributed to hair cells. Their function appears to be to increase the threshold for afferent impulses and ...
Güth K, Potter JD (1987) Effect of rigor and cycling crossbridges on the structure of troponic C and on the calcium affinity of the calcium specific regulatory sites in skinned rabbit psoas fibres. J Biol Chem 262:13627–13635 PubMedGoogle Scholar ...