Across
- 2. Contains thin filaments but no thick filaments
- 4. Center rod holds the f-actin strand together
- 5. Actinin that have a zig-zag shape, marks the end of the sarcomere
- 7. Length of the thick filaments
- 8. Sarcoplasmic Reticulum functions to store this
- 9. Protein that covers the myosin-binding sites on actin
- 14. The contractile units of muscles
- 16. The plasma membrane of a muscle cell
- 17. Muscle protein that binds to the tropomyosin to G-Actin, binds with calcium
- 18. muscle fibers develop through the fusion of embryonic cells
Down
- 1. Central core of the thick filament
- 3. Contains thick filaments, but no thin filaments
- 6. The cytoplasm of a muscle cell
- 10. is in the center of the band.
- 11. Fibers, Axons of the neurons, penetrate the epimysium, branch through the perimysium
- 12. Carries action potentials that allow the muscle to contract
- 13. Are due to the precise arrangments of actin and myosin in the myofibril
- 15. Thick filaments are made of this