Human Anatomy. Chapter 10 The Muscular System

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krista.s
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240082
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Human Anatomy. Chapter 10 The Muscular System
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2013-10-11 13:55:53
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anatomy
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The muscular system study guide
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  1. What are the 4 basic properties of all muscle tissue (skeletal, cardiac, and smooth)?
    • -contractility
    • -excitability
    • -extensibility
    • -elasticity
  2. What are the 5 basic functions of a skeletal muscle?
    • -movement
    • -posture
    • -support
    • -regulate flow
    • -maintain temperature
  3. What layer of connective tissue surrounds the entire muscle?
    epimysium
  4. What layer of connective tissue divides the muscle into a series of internal compartments containing a bundle of muscle fibers and contains blood vessels and nerves that branch to supply each bundle of fibers?
    perimysium
  5. What is the technical term for a bundle of muscle fibers?
    Fasicle
  6. What layer of connective tissue surrounds each muscle fiber, binds each fiber to its neighbor, and supports capillaries that supply blood to individual muscle fibers?
    endomysium
  7. What do we call a thick cord or cable formed from the convergence of the connective tissue layers of a muscle that bind the muscle to bone, skin, or another muscle?
    tendon
  8. What do we call a convergence of connective tissue layers if it takes the form of a flattened sheet rather than a cord/cable?
    Apo neurosis
  9. What do we call the site of chemical communication between a nerve and a skeletal fiber?
    neuromuscular junction
  10. What is the technical term for the plasma membrane of a skeletal muscle cell?
    sarcolemma
  11. What is the name of the deep indentations of the skeletal muscle cell's plasma membrane that extend into the cytoplasm and carries electrical impulses that stimulate and coordinate muscle contractions?
    t-tubules
  12. What is the technical term for the structures, composed of bundles of protein filaments, that can shorten are therefore responsible for muscle contraction?
    myofibrils
  13. What is the name of the repeating unit of protein fibers in an myofibril?
    sarcomere
  14. what protein is found in the THICK filaments of a myofibril?
    myosin
  15. What protein is found in the THIN filaments of a myofibril?
    actin
  16. At what region do proteins bind thick filaments at the center of the sarcomere?
    M-line
  17. At what region do proteins bind thin filaments at the ends of the sarcomere?
    z-line
  18. What region of the sarcomere contains only thick filaments (including the m-line)?
    H-band
  19. What region of the sarcomere contains only thin filaments (continuous between sarcomeres and includes the z-line)?
    I-band
  20. What region of the sarcomere consists of the entire region with thick filaments (both overlapping thick and thin filaments and only thick filaments)?
    A-band
  21. What do we call all of the muscle fibers controlled by a single motor neuron?
    motor unit
  22. What does the size of the motor unit (# of muscle fibers) tell us?
    Fewer myofibrils per neuron= greater control
  23. What type of muscle fibers are smaller in diameter, contain densely packed myofibrils, have large glycogen reserves, have a few mitochondria, and are prone to fatigue?
    Fast fibers
  24. What type of muscle fibers are smaller in diameter, have an extensive capillary network, contain myoglobin (stores oxygen), and have many mitochondria?
    Slow fibers
  25. What do we call the attachment site of a muscle that (generally) remains stationary?
    Origin
  26. What do we call the attachment site of a muscle that moves during contraction?
    insertion
  27. What do we call a muscle whose contraction is mostly responsible for producing a movement?
    • -Agonist
    • -Prime mover
  28. What do we call a muscle that assists the primary muscle in performing a movement?
    Synergist
  29. What do we call a muscle whose actions oppose those of another muscle?
    Antagonist

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