Across
- 4. Decrease in muscle size due to disuse
- 6. Thick myofilament that forms the dark band on muscle fibers
- 7. The transport system of a muscle cell
- 8. Layer of tissue that surrounds the fascicles
- 12. Striated and voluntary muscle
- 16. Neurotransmitter that crosses the synapse and is picked up by the receptors on the muscle cell
- 17. Thin myofilament that forms the light band on muscle fibers
- 18. Striated and involuntary muscle
- 20. Parallel contractile units of a muscle cell that are composed of actin and myosin
- 21. Contraction in which muscle tension increases but no movement results
- 22. Non-striated and involuntary muscle
- 23. The small gap between a motor neuron and a muscle fiber/sarcolemma
- 24. Disease in which muscles contract and cannot relax. Also called, "Lockjaw"
- 26. Contraction that produces movement at a joint
- 27. Muscle cell
- 28. Excessive growth/enlargement of muscles
Down
- 1. The membrane of a muscle cell/fiber
- 2. Tissue layer that surrounds individual muscle fibers
- 3. Outermost layer of muscle tissue
- 5. When a muscle loses its ability to contract after prolonged activity
- 9. The cytoplasm of a muscle fiber
- 10. A bundle of muscle fibers
- 11. A quick, jerky contraction
- 13. A sustained and steady muscle contraction
- 14. A protein that maintains the structure of muscle fibers
- 15. Substance that can indicate muscle damage
- 19. Progressive degeneration of motor nerves, which prevents messages being sent to muscles, leading to atrophy
- 25. The contractile unit of a muscle fiber