Muscular System Vocab

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Across
  1. 7. attachment of the muscle to the bone that moves
  2. 8. muscle fibers increase in size
  3. 11. mover a muscle that acts directly to bring about a desired movement.
  4. 14. a protein that, together with actin, is responsible for muscular contraction and relaxation
  5. 15. sheath of connective tissue that surrounds an individual skeletal muscle fiber
  6. 17. muscle a muscle that is connected to the skeleton to form part of the mechanical system that moves the limbs and other parts of the body.
  7. 18. junction union between a nerve fiber and a muscle fiber
  8. 21. a protein in a muscle fiber, that together with myosin, is responsible for contraction and relaxation
  9. 22. fibers Tiny fibers of muscle that bunch together and contract.
  10. 23. the structural and functional unit of a myofibril
  11. 25. help prime movers by producing the same movement or reducing undesirable movements
  12. 26. a bundle of skeletal muscle fibers surrounded by perimysium, a type of connective tissue.
Down
  1. 1. the physiological inability of a muscle to contract
  2. 2. degree of muscle tension or resistance during rest or in response to stretching.
  3. 3. one of the contractile fibers found within muscle cells
  4. 4. muscles that oppose or reverse a movement
  5. 5. attachment of the muscle to the bone that remains stationary
  6. 6. threadlike proteins responsible for muscle contraction
  7. 9. sheath of connective tissue that encloses a bundle of skeletal muscle fibers
  8. 10. covering of muscle
  9. 12. cordlike or bandlike mass of white fibrous connective tissue that connects a muscle to a bone
  10. 13. muscle muscle tissue in which the contractile fibrils are not highly ordered, occurring in the gut and other internal organs and not under voluntary control. Often contrasted with striated muscle
  11. 16. mechanism proposed for muscle contraction where myosin head groups of the thick filaments move along the interdigitated actin of the thin filaments, sliding past them and thereby shortening the sarcomere.
  12. 19. any cavity or enclosed space serving as a reservoir
  13. 20. fibers of an unused muscle shrink
  14. 24. muscle cell membrane
  15. 26. a band or sheet of connective tissue, primarily collagen, beneath the skin that attaches, stabilizes, encloses, and separates muscles and other internal organs.
  16. 27. muscle Cardiac muscle (heart muscle) is a type of involuntary striated muscle found in the walls and histological foundation of the heart, specifically the myocardium.