Skeletal Muscle Contraction

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Across
  1. 3. Actin: __________ Filament
  2. 5. provides the energy needed for muscle action
  3. 8. area containing all the myosin of a sarcomere and some of the actin filaments
  4. 10. protein that forms myofibrils, connected to ZDiscs
  5. 11. cell membrane surroundings muscle fiber
  6. 13. specialized endoplasmic reticulum for muscle cells
  7. 17. fibers comprising the myofibril arranged in a repeating pattern of light and dark
  8. 18. ion that triggers cross bridge cycle by binding to actin
Down
  1. 1. for a muscle cell to contract, a sarcomere must _______________.
  2. 2. only contains thin filaments
  3. 4. lateral border of a sarcomere
  4. 6. the central region of the AZone
  5. 7. tubes that penetrate into the center of skeletal muscle cells, connecting sarcoplasmic reticulum and containing calcium
  6. 9. the distance between two ZDiscs
  7. 12. organelles that convert nutrients into ATP
  8. 14. Myosin: _________ Filament
  9. 15. center of a sarcomere, bound to myosin
  10. 16. protein that forms myofibrils with a globular head