Chapter 6 Muscular System Crossword

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Across
  1. 1. contractile organelles found in the cytoplasm of muscle cells.
  2. 3. movement that increases the angle of a joint; straightening a flexed knee.
  3. 7. the smallest contractile unit of muscle; extends from one Z disc to the next.
  4. 8. muscles that act in opposition to an agonist or prime mover.
  5. 10. muscle under control of the will; skeletal muscle.
  6. 13. muscles consisting of spindle shaped, nonstriated muscle cells, involuntary muscle.
  7. 14. organ system consisting of skeletal muscles and their connective tissue attachments.
  8. 17. the connective tissue enveloping bundles of muscle fibers.
  9. 19. an electrical event occuring when a stimulus of sufficient intensity is applied to a neuron or muscle cell, allowing sodium ions to move into the cell and reverse the polarity.
  10. 21. requiring oxygen to live or grow
  11. 22. the fluid-filled space at a synapse between neurons.
  12. 25. specialized muscle of the heart.
  13. 26. a contractile protein of muscle
  14. 27. muscle cells
  15. 29. ability to respond to a stimulus
  16. 30. of the same length
  17. 32. mover muscle whose contractions are primarily responsible for a particular movement; antagonist.
  18. 33. neuron process that carries impulses away from nerve cell body; efferent process; the conducting portion of a nerve cell.
  19. 34. fibrous or membranous sheet connecting a muscle and the part it moves.
  20. 35. sustained partial contraction of a muscle in response to stretch receptor inputs; keeps the muscle healthy and ready to react.
  21. 36. a bundle of nerve or muscle fibers bound together by connective tissue.
  22. 39. the movable attachment of a muscle as opposed to its origin
  23. 41. filaments composing the myofibrils. Of two types: actin and myosin.
  24. 45. one of the principal contractile proteins found in muscle.
  25. 46. muscles cooperating with another muscle or muscle group to produce a desired movement.
  26. 47. to move away from the midline of the body
Down
  1. 2. muscle composed of cylindrical multinucleate cells with obvious striations; the muscle(s) attached to the body’s skeleton; also called voluntary muscle.
  2. 4. attachment of a muscle that remains relatively fixed during muscular contraction.
  3. 5. the region where a motor neuron comes into close contact with a skeletal muscle cell.
  4. 6. a response that varies directly with the strength of the stimulus.
  5. 8. a chemical transmitter substance released by certain nerve endings
  6. 9. respiration in which oxygen is consumed and glucose is broken down entirely; water, carbon dioxide, and large amounts of ATP are the final products.
  7. 11. to move toward the midline of the body.
  8. 12. muscle muscle consisting of cross-striated (cross-striped) muscle fibers; includes cardiac and skeletal muscle.
  9. 15. the thin connective tissue surrounding each muscle cell.
  10. 16. not requiring oxygen
  11. 18. circular movement of a body part.
  12. 20. turning toward a common point from different directions.
  13. 23. muscles acting to immobilize a joint or a bone; fixes the origin of a muscle so that muscle action can be exerted at the insertion.
  14. 24. The product of anaerobic metabolism, especially in muscle.
  15. 28. (1) the tense, contracted state of a muscle; (2) an infectious disease.
  16. 31. chemical released by neurons that may, upon binding to receptors of neurons or effector cells, stimulate or inhibit them.
  17. 37. the sheath of fibrous connective tissue surrounding a muscle.
  18. 38. the volume of oxygen required after exercise to oxidize the lactic acid formed during exercising.
  19. 40. breakdown of glucose to pyruvic acid; an anaerobic process.
  20. 42. bending; the movement that decreases the angle between bones.
  21. 43. a single rapid contraction of a muscle followed by relaxation.
  22. 44. cord of dense fibrous tissue attaching a muscle to a bone.