Muscles

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Across
  1. 1. Name for muscle fiber cytoplasm
  2. 3. What activates tropomyosin
  3. 4. Bundles of thick and thin myofilaments
  4. 6. Special name for the muscle fiber plasma membrane
  5. 12. Where a motor neuron
  6. 15. What actin molecules are “hidden” under when not activated
  7. 16. Another name for muscle cell
  8. 18. Line where actin molecules attach to each other
  9. 19. Name for thin myofilaments
Down
  1. 1. Specialized smooth endoplasmic reticulum
  2. 2. Smallest functional unit of skeletal muscle fiber
  3. 5. Divides and covers the muscle into bundles
  4. 7. Covers the entire muscle
  5. 8. Name for thick myofilaments
  6. 9. Where action occurs in the sarcomere
  7. 10. 2 Terminal cisterna + 1 T Tubule = ___
  8. 11. Covers each muscle fiber
  9. 13. Which part of myosin acts on actin?
  10. 14. Allows for electrical stimulate to reach each fiber
  11. 17. Where myosin is anchored