Muscular Contraction

  • Richard B. Stein


In the last chapter, interactions between nerve and muscle were considered in which neuronal action potentials release a chemical transmitter. For many muscles of lower animals and a few specialized muscles of mammals, graded depolarizations of the muscle fiber membrane are produced which lead to graded contractions. In most types of skeletal muscle in mammalian systems, the transmitter produces enough ionic current through the muscle membrane to generate action potentials. As will be discussed in this chapter, the action potential leads to a characteristic twitch contraction. The process whereby the electrical activity of the muscle membrane activates the contractile proteins contained within the muscle cells is referred to as excitationcontraction coupling.


Thin Filament Myosin Head Thick Filament Myosin Molecule Transverse Tubule 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • Richard B. Stein
    • 1
  1. 1.University of AlbertaEdmontonCanada

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