Skeletal Muscles
Across
- 1. Bundles of muscle cells
- 3. Vesicles inside the axon terminal containing acetylcholine
- 6. Protein in thin filaments
- 7. Middle of each Aband
- 11. Part of the motor neuron connecting to the muscle fiber
- 15. Polarized state of a muscle fiber when not being stimulated
- 17. Connective tissue between bones and muscles
- 18. Connective tissue around the entire muscle
- 20. Connective tissue around fascicles
- 21. Connect neighboring filaments
- 22. tubes of the sarcolemma extending deep into the cell
- 25. Second name for muscle cells
- 26. Plasma membrane of a muscle cell
- 27. Contains myofilaments; contractile unit of a muscle cell
- 28. Elongated cells with multiple nuclei with visible striations
- 29. Space between the axon terminal and the motor end plate of the sarcolemma
- 30. Areas of thick filaments; dark in color
- 31. Spindle shaped cells with a single, central nucleus and no visible striations
Down
- 2. Electric impulse that depolarizes a muscle fiber and causes it to contract
- 4. Endoplasmic reticulum of a muscle cell; surrounds myofibrils
- 5. Intracellular fluid
- 8. Thick and thin filaments in myofibrils
- 9. Folded part of the sarcolemma that interacts with the motor neuron
- 10. In thin filaments; connects myofibrils
- 12. In between two Z lines
- 13. Sacs of calcium ions
- 14. Connective tissue around muscle cells; electrically insulates cells from one another
- 16. T tubule between two adjacent terminal cisternae
- 19. Areas of thin filaments; light in color
- 23. Branching cells with a single peripheral nucleus and visible striations
- 24. Neuron that stimulates contraction of muscle fibers
- 27. Protein in thick filaments