Muscular Crossword

1. ability to forcibly shorten when an adequate stimulus is received.
3. myofilaments are able to slide past each other during contractions. The muscle shortens, and movement occurs.
4. covers the entire skeletal muscle.
6. muscle filaments are trying to slide, but the muscle is pitted against an immovable object. Tension increases, but muscles do not shorten.
10. exercise results in stronger, more flexible muscles with greater resistance to fatigue; makes body metabolism more efficient.
11. long organelles inside muscle cell.
12. ability to recoil and resume resting length after stretching.
13. stores and releases calcium.
15. thick filaments.
16. exercise increases muscle size and strength; individual muscle fibers enlarge.
17. wraps around a fascicle (bundle) of muscle fibers.
19. on the outside of the epimysium.

2. cordlike structures; mostly collagen fibers.
4. ability of muscle cells to be stretched.
5. are thin filaments.
7. specialized plasma membrane.
8. ability to receive and respond to a stimulus.
9. encloses a single muscle fiber.
14. sheetlike structures that attach muscles indirectly to bones, cartilages, or connective tissue coverings.
18. contractile unit of a muscle fiber.