Chapter 8: Muscles and Muscle Tissue

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Chapter 8: Muscles and Muscle Tissue
2010-11-01 19:36:02

the essential information (excluding muscle contraction process and description lists)
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  1. Skeletal muscle attaches to _____.
  2. Key Facts about skeletal muscle.
    • 1. longest fibers
    • 2. striations
    • 3. many nuclei
    • 4. voluntary
    • 5. organ
  3. endomysium
    fine sheath of areolar connective tissue that surrounds each muscle fiber
  4. fascicles
    bundles of muscle fibers/cells
  5. perimysium
    collagenic sheath that surrounds each fascicle
  6. epimysium
    dense fibrous connective tissue that surrounds the entire muscle
  7. deep fascia
    found outside the epimysium
  8. Functions of connective tissue wrappings.
    support, protection, and entry and exit routes for blood vessels and nerves.
  9. sarcolemma
    plasma membrane surface
  10. sarcoplasm
    similar to cytoplasm; contains glycogen and myoglobin
  11. myofibrils
    hundreds of thousands of found in each muscle fiber (contain sarcomeres)
  12. sarcomere
    small area on the myofibril that is the base unit of contraction
  13. protein(s) found in thick filaments
  14. protein(s) found in thin filaments
    • -actin
    • -tropomyosin
    • -troponin
  15. motor nueron
    a nueron that transmits impulses from the central nervous system to muscles and glands
  16. nueromuscular junction
    area where the motor neuron meets the muscle fiber
  17. SR
    membranous network of channels and tubules in a muscle fiber that stores calcium ions
  18. transverse tubules
    membranous channel that extends from the sarcolemma deep inside the muscle fiber to deliver the impulse
  19. This form of respiration that needs oxygen
    aerobic respiration
  20. myoglobin
    pigment that stores oxygen
  21. oxygen debt
    the amount of oxygen required to convert accumulated lactic acid to glucose and restore supplies of ATP and creatine phosphate
  22. muscle fatigue
    when a muscle loses its ability to contract