Across
- 4. Embryonic cells that fuse to create individual skeletal muscle fibers
- 6. All muscle fibers controlled by a single motor neuron
- 7. Communication between the nervous system and a skeletal muscle fiber
- 8. Where ACh diffuses to bind with receptors
- 9. Single stimulus relaxation sequence
- 13. Binds to tropomyosin and G actin, and has a receptor that binds to the calcium ion
- 15. Protein filaments of myosin
- 18. Cell member of a muscle fiber
- 19. A passive force that opposes movement
- 20. The terminal cisternae and the transverse tubules
Down
- 1. Where the rate of stimulation is increasing, eliminating the relaxation phase
- 2. Strands that cover active sites and prevent actin-myosin interaction
- 3. Where tension is at its peak and contraction occurs
- 5. Functional units of thick and thin myofilaments
- 10. Light, isoptropic, contain thin filaments
- 11. Boundary lines between adjacent sarcomeres
- 12. Separates the synaptic terminal and the sarcolemma
- 14. Protein filaments of actin
- 16. Cytoplasm of the muscle fiber
- 17. Dense layer of collagen fiber