Ch9T1-2.txt

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aphy101
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271221
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Ch9T1-2.txt
Updated:
2014-04-20 13:17:07
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profmwinston
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Ch 9 Topics 1-2 Skeletal Muscle Structure and Fibers
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  1. ´╗┐Layers of dense connective tissue that separate and hold skeletal muscles in position.
    Fascia
  2. Fascia that surrounds or penetrates the muscles.
    Deep Fascia
  3. Fascia just beneath the skin.
    Subcutaneous Fascia
  4. Fascia of the serous membranes covering organs in various body cavities and lining those cavities.
    Subserous Fascia
  5. Cordlike structure of dense connective tissue that attaches muscles to bone.
    Tendon
  6. Sheet-like structure that attaches muscles to other muscles or to bone.
    Aponeurosis
  7. Layer of connective tissue that closely surrounds a skeletal muscle.
    Epipysium
  8. Layer of connective tissue that separates the muscle tissue into small sections containing bundles of skeletal muscle fibers called fascicles.
    Perimysium
  9. Layer of connective tissue that covers the muscle fibers within the fascicles.
    Endomysium
  10. List the 5 levels of structure of a muscle in order.
    1) Muscle 2) Fascicles 3) Muscle Fibers (cells) 4) Myofibrils 5) Thick and Thin Filaments
  11. Bundles of skeletal muscle fibers.
    Fascicles
  12. A single muscle cell.
    Muscle Fiber
  13. Muscle cell membrane.
    Sarcolemma
  14. Cytoplasm of a muscle cell.
    Sarcoplasm
  15. Threadlike structures that run parallel in the sarcoplasm; play a role in muscle contraction.
    Myofibrils
  16. Composes thick protein filaments in myofibrils.
    Myosin
  17. Composes thin protein filaments in myofibrils.
    Actin
  18. A repeating pattern of a myofibril.
    Sarcomere
  19. Protein molecule that has three protein subunits and is attached to actin.
    Troponin
  20. Protein molecule that is rod-shaped and occupies the longitudinal grooves of the actin helix.
    Tropomyosin
  21. A network of membranous channels within the sarcoplasm of a muscle fiber that surrounds each myofibril and runs parallel to it.
    Sarcoplasmic Reticulum
  22. Membranous channels that extend into the sarcoplasm, continuous with the sarcolemma, and contain extracellular fluid.
    Transverse Tubules (T-Tubules)
  23. Enlarged portions of the sarcoplasmic reticulum, T-tubules lie between them.
    Cisternae

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