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THE CONTRACTILE MECHANISM. In the intact body, the process of smooth muscle cell contraction is regulated principally by receptor and mechanical (stretch) activation of the contractile proteins myosin and actin.
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PKC, mimic the action of DG and cause contraction of smooth...
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Chętnie wyświetlilibyśmy opis, ale witryna, którą oglądasz,...
- Vol. 27, No. 4
Contractile activity in smooth muscle is initiated by a Ca...
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Smooth muscle is an essential component of the walls of numerous hollow or tubular organs throughout the body, including blood vessels, airways, and the bladder. Proper physiological functioning of these organs relies heavily on the appropriate activation and contraction of the smooth muscle tissue.
Smooth muscle cells rapidly redifferentiate in culture, entering a so-called proliferative or synthetic state characterized by reduced expression of contractile proteins, changes in cytoskeletal architecture, loss of dense bodies and disappearance of excitability mechanisms.
theory explaining striated muscle contraction (Hanson and Huxley, 1953; Huxley and Niedergerke, 1954; Huxley 1957) is also applicable for smooth muscle contraction.
14 sie 2023 · Mechanism. Smooth muscle contraction depends on calcium influx. Calcium increases within the smooth muscle cell through two different processes. First, depolarization, hormones, or neurotransmitters cause calcium to enter the cell through L-type channels located in the caveolae of the membrane.
FORCE GENERATION AND PLASTICITY OF SMOOTH MUSCLE. Smooth muscle is insanely efficient; in comparison with skeletal muscle, it contains 20% of the myosin, and has almost 100 times less ATPase activity- but the force it produces is approximately the same, per crossectional area.
explain how the series-elastic component affects muscle contraction. define the term motor unit and explain how motor units are used to control muscle contraction. describe the structure of myofibrils and explain how it accounts for the striated appearance of skeletal muscle fibers.
