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Author: Ronald J. Korthuis Publisher: Morgan & Claypool Publishers ISBN: 1615041834 Category : Medical Languages : en Pages : 147
Book Description
The aim of this treatise is to summarize the current understanding of the mechanisms for blood flow control to skeletal muscle under resting conditions, how perfusion is elevated (exercise hyperemia) to meet the increased demand for oxygen and other substrates during exercise, mechanisms underlying the beneficial effects of regular physical activity on cardiovascular health, the regulation of transcapillary fluid filtration and protein flux across the microvascular exchange vessels, and the role of changes in the skeletal muscle circulation in pathologic states. Skeletal muscle is unique among organs in that its blood flow can change over a remarkably large range. Compared to blood flow at rest, muscle blood flow can increase by more than 20-fold on average during intense exercise, while perfusion of certain individual white muscles or portions of those muscles can increase by as much as 80-fold. This is compared to maximal increases of 4- to 6-fold in the coronary circulation during exercise. These increases in muscle perfusion are required to meet the enormous demands for oxygen and nutrients by the active muscles. Because of its large mass and the fact that skeletal muscles receive 25% of the cardiac output at rest, sympathetically mediated vasoconstriction in vessels supplying this tissue allows central hemodynamic variables (e.g., blood pressure) to be spared during stresses such as hypovolemic shock. Sympathetic vasoconstriction in skeletal muscle in such pathologic conditions also effectively shunts blood flow away from muscles to tissues that are more sensitive to reductions in their blood supply that might otherwise occur. Again, because of its large mass and percentage of cardiac output directed to skeletal muscle, alterations in blood vessel structure and function with chronic disease (e.g., hypertension) contribute significantly to the pathology of such disorders. Alterations in skeletal muscle vascular resistance and/or in the exchange properties of this vascular bed also modify transcapillary fluid filtration and solute movement across the microvascular barrier to influence muscle function and contribute to disease pathology. Finally, it is clear that exercise training induces an adaptive transformation to a protected phenotype in the vasculature supplying skeletal muscle and other tissues to promote overall cardiovascular health. Table of Contents: Introduction / Anatomy of Skeletal Muscle and Its Vascular Supply / Regulation of Vascular Tone in Skeletal Muscle / Exercise Hyperemia and Regulation of Tissue Oxygenation During Muscular Activity / Microvascular Fluid and Solute Exchange in Skeletal Muscle / Skeletal Muscle Circulation in Aging and Disease States: Protective Effects of Exercise / References
Author: Ronald J. Korthuis Publisher: Morgan & Claypool Publishers ISBN: 1615041834 Category : Medical Languages : en Pages : 147
Book Description
The aim of this treatise is to summarize the current understanding of the mechanisms for blood flow control to skeletal muscle under resting conditions, how perfusion is elevated (exercise hyperemia) to meet the increased demand for oxygen and other substrates during exercise, mechanisms underlying the beneficial effects of regular physical activity on cardiovascular health, the regulation of transcapillary fluid filtration and protein flux across the microvascular exchange vessels, and the role of changes in the skeletal muscle circulation in pathologic states. Skeletal muscle is unique among organs in that its blood flow can change over a remarkably large range. Compared to blood flow at rest, muscle blood flow can increase by more than 20-fold on average during intense exercise, while perfusion of certain individual white muscles or portions of those muscles can increase by as much as 80-fold. This is compared to maximal increases of 4- to 6-fold in the coronary circulation during exercise. These increases in muscle perfusion are required to meet the enormous demands for oxygen and nutrients by the active muscles. Because of its large mass and the fact that skeletal muscles receive 25% of the cardiac output at rest, sympathetically mediated vasoconstriction in vessels supplying this tissue allows central hemodynamic variables (e.g., blood pressure) to be spared during stresses such as hypovolemic shock. Sympathetic vasoconstriction in skeletal muscle in such pathologic conditions also effectively shunts blood flow away from muscles to tissues that are more sensitive to reductions in their blood supply that might otherwise occur. Again, because of its large mass and percentage of cardiac output directed to skeletal muscle, alterations in blood vessel structure and function with chronic disease (e.g., hypertension) contribute significantly to the pathology of such disorders. Alterations in skeletal muscle vascular resistance and/or in the exchange properties of this vascular bed also modify transcapillary fluid filtration and solute movement across the microvascular barrier to influence muscle function and contribute to disease pathology. Finally, it is clear that exercise training induces an adaptive transformation to a protected phenotype in the vasculature supplying skeletal muscle and other tissues to promote overall cardiovascular health. Table of Contents: Introduction / Anatomy of Skeletal Muscle and Its Vascular Supply / Regulation of Vascular Tone in Skeletal Muscle / Exercise Hyperemia and Regulation of Tissue Oxygenation During Muscular Activity / Microvascular Fluid and Solute Exchange in Skeletal Muscle / Skeletal Muscle Circulation in Aging and Disease States: Protective Effects of Exercise / References
Author: Haruo Sugi Publisher: Springer Science & Business Media ISBN: 9780306478703 Category : Medical Languages : en Pages : 720
Book Description
This volume presents the proceedings of a muscle symposium, which was held as the Fourth Fujihara seminar on October 28 - November 1, 2002, at Hakone, Japan. This volume covers all fields of muscle biology, from molecules to humans. This book provides information about recent progress of muscle research as well as the problems that remain to be investigated. This volume will stimulate muscle investigators to design and perform novel experiments to clarify the mysteries in muscle contraction.
Author: Robert Fitridge Publisher: University of Adelaide Press ISBN: 1922064009 Category : Medical Languages : en Pages : 589
Book Description
New updated edition first published with Cambridge University Press. This new edition includes 29 chapters on topics as diverse as pathophysiology of atherosclerosis, vascular haemodynamics, haemostasis, thrombophilia and post-amputation pain syndromes.
Author: Donald L. Riddle Publisher: Firefly Books ISBN: 9780879695323 Category : Medical Languages : en Pages : 1252
Book Description
Defines the current status of research in the genetics, anatomy, and development of the nematode C. elegans, providing a detailed molecular explanation of how development is regulated and how the nervous system specifies varied aspects of behavior. Contains sections on the genome, development, neural networks and behavior, and life history and evolution. Appendices offer genetic nomenclature, a list of laboratory strain and allele designations, skeleton genetic maps, a list of characterized genes, a table of neurotransmitter assignments for specific neurons, and information on codon usage. Includes bandw photos. For researchers in worm studies, as well as the wider community of researchers in cell and molecular biology. Annotation copyrighted by Book News, Inc., Portland, OR
Author: S. V. Perry Publisher: Cambridge University Press ISBN: 9780521579162 Category : Medical Languages : en Pages : 184
Book Description
Striated muscle is the most common muscle type in the vertebrate body. This book describes in molecular terms the components and intracellular events responsible for the contraction and relaxation of striated muscle. The topic is introduced with a discussion of motile systems occurring throughout the biological world and their relation to the highly specialised contractile system of muscle. Professor Perry then goes on to discuss the mechanochemical process and the regulatory roles of calcium, I filament proteins and phosphorylation. The book ends with an examination of the role of dystrophin and its implications in Duchenne muscular dystrophy, the most common form of muscle disease. Molecular Mechanisms in Striated Muscle will provide an important source of information and current theory for researchers and postgraduate students in muscle physiology, biochemistry and medicine.
Author: David Aitchison Smith Publisher: Springer ISBN: 3030035263 Category : Medical Languages : en Pages : 433
Book Description
Understanding the molecular mechanism of muscle contraction started with the discovery that striated muscle is composed of interdigitating filaments which slide against each other. Sliding filaments and the working-stroke mechanism provide the framework for individual myosin motors to act in parallel, generating tension and loaded shortening with an efficient use of chemical energy. Our knowledge of this exquisitely structured molecular machine has exploded in the last four decades, thanks to a bewildering array of techniques for studying intact muscle, muscle fibres, myofibrils and single myosin molecules. After reviewing the mechanical and biochemical background, this monograph shows how old and new experimental discoveries can be modelled, interpreted and incorporated into a coherent mathematical theory of contractility at the molecular level. The theory is applied to steady-state and transient phenomena in muscle fibres, wing-beat oscillations in insect flight muscle, motility assays and single-molecule experiments with optical trapping. Such a synthesis addresses major issues, most notably whether a single myosin motor is driven by a working stroke or a ratchet mechanism, how the working stroke is coupled to phosphate release, and whether one cycle of attachment is driven by the hydrolysis of one molecule of ATP. Ways in which the theory can be extended are explored in appendices. A separate theory is required for the cooperative regulation of muscle by calcium via tropomyosin and troponin on actin filaments. The book reviews the evolution of models for actin-based regulation, culminating in a model motivated by cryo-EM studies where tropomyosin protomers are linked to form a continuous flexible chain. It also explores muscle behaviour as a function of calcium level, including emergent phenomena such as spontaneous oscillatory contractions and direct myosin regulation by its regulatory light chains. Contraction models can be extended to all levels of calcium-activation by embedding them in a cooperative theory of thin-filament regulation, and a method for achieving this grand synthesis is proposed. Dr. David Aitchison Smith is a theoretical physicist with thirty years of research experience in modelling muscle contractility, in collaboration with experimental groups in different laboratories.
Author: Helen Sink Publisher: Springer Science & Business Media ISBN: 0387329633 Category : Science Languages : en Pages : 214
Book Description
The different aspects of muscle development are considered from cellular, molecular and genetic viewpoints, and the text is supported by black/white and color illustrations. The book will appeal to those studying muscle development and muscle biology in any organism.
Author: John M. Squire Publisher: Gulf Professional Publishing ISBN: 9780120342716 Category : Science Languages : en Pages : 558
Book Description
Molecular Motors and Muscle is the second of a three-part series on Fibrous Proteins. The books are based on a very successful workshop in Alpbach, Austria on the general topic of Fibrous Proteins that gave rise to the award-winning issue of Journal of Structural Biology. There are two major types of protein: Globular proteins which are often enzymes which speed up biochemical reactions and Fibrous proteins which often have more structural roles but can also have dynamic properties. Fibrous proteins are usually either elongated molecules which pack together to form long filaments, as in the case of the intermediate filaments in our hair and skin and as in collagen fibrils in tendons and bones or they are globular proteins which aggregate linearly to form long filaments, such as actin filaments or microtubules. Fibrous proteins act as molecular scaffolds in cells, they can be involved in transport of cell organelles or even on a visible scale as in our muscles. They provide the supporting structures of our skeletons, bones, tendons, cartilage, and skin. They define the mechanical properties of our internal hollow organs such as the intestines, heart, and blood vessels. They are vital for life and represent a fascinating subset of the proteome. Advances in Protein Chemistry is available online on ScienceDirect - full-text online of volumes 53 onwards. Elsevier book series on ScienceDirect gives multiple users throughout an institution simultaneous online access to an important compliment to primary research. Digital delivery ensures users reliable, 24-hour access to the latest peer-reviewed content. The Elsevier book series are compiled and written by the most highly regarded authors in their fields and are selected from across the globe using Elsevier's extensive researcher network. For more information about the Elsevier Book Series on ScienceDirect Program, please visit: http://www.info.sciencedirect.com/bookseries/ *Allows a comparison to be made between unique but related structures. *Quality of the text and illustrations allows ready comprehension of key protein design features. *Identifies fibrous protein sequence features for analysis of the human genome. *Analyzes design principles for fibrous protein sequences thus leading potentially to development of new devices by nanofabrication.
Author: Ronald J. Korthuis
Author: 
Author: Ronald J. Korthuis
Author: Haruo Sugi
Author: Robert Fitridge
Author: Donald L. Riddle
Author: S. V. Perry
Author: George Karpati
Author: David Aitchison Smith
Author: Helen Sink
Author: John M. Squire