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