Across
- 3. rope-like structure blocking actin binding sites.
- 6. composed of 3 protein subunits.
- 9. CT that surrounds myofibrils
- 11. ATP binds to ATP binding site releasing actin.
- 13. light and contains thin filaments.
- 15. type of gated channels that reside in terminal cisternae.
- 16. these filaments are made of myosin protein
- 17. name for post-synaptic receptor for contractions.
- 18. causes filaments to slide and ADP falls off.
- 20. abbreviation for the modified ER in skeletal muscle.
- 22. CT that surrounds skeletal muscle
- 24. runs along terminal cisternae.
- 26. is stored in the terminal cisternae of the SR.
- 27. plasma membrane of skeletal muscle.
Down
- 1. single motor neuron + myofibrils it innervates.
- 2. zigzag borders that lies in the center of I-band.
- 4. during contractions, thick filaments do what to thin filaments?
- 5. plate on sarcolemma where NMJ occurs.
- 7. these filaments are made of actin protein
- 8. dark and contains thick filaments.
- 10. are either Thick or Thin
- 12. contains two terminal cisternae and one t-tubule.
- 14. column of muscle cells or myofibrils
- 18. CT that surrounds fascicles
- 19. center area where actin and myosin do not overlap.
- 21. formed when myosin head binds to actin.
- 23. center structural protein that anchors myosin.
- 25. this Calcium pump, pumps Ca2+ back into the SR.