ch 8 anatomy vocab remembering project

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Across
  1. 5. Cell membrane of skeletal muscle
  2. 10. Pigment responsible for the red color of blood
  3. 11. Another pigment that is synthesized in muscle cells and imparts the reddish-brown color of skeletal muscle tissue
  4. 12. Type of connective tissue, forms broad fibrous sheets; attach to bone or to coverings of adjacent muscles
  5. 17. Increase in the number of motor units being activated
  6. 22. Another word for prime mover
  7. 23. Movable end of the muscle
  8. 25. mover A muscle that provides most of the movement
  9. 26. Immovable end of the muscle
  10. 27. smooth muscle Composed of sheets of spindle-shaped cells in close contact with one another
  11. 30. muscle Muscle found in the heart only
  12. 32. Threadlike structures that lie parallel to one another in the sarcoplasm
  13. 35. A single contraction that lasts only a fraction of a second
  14. 36. Enzyme that breaks down acetylcholine in the muscle fiber and prevents a single nerve impulse from continuously stimulating the muscle fiber
  15. 38. smooth muscle The muscle fibers are separate rather than organized into sheets
  16. 40. Cytoplasm of the skeletal muscles
  17. 41. Tiny vesicles that store neurotransmitters
  18. 42. Muscles that can resists the prime movers actions and cause movement in the opposite direction
Down
  1. 1. end plate
  2. 2. A chemical that is released through the motor neuron helping with muscle contraction
  3. 3. Thick protein filament bands in the myofibrils to help with contraction
  4. 4. phosphate Molecule that makes it possible to regenerate ATP from ADP and phosphate
  5. 6. Thin protein filament bands in the myofibrils to help with contraction
  6. 7. unit A motor neuron and the muscle fibers that it controls
  7. 8. the resulting forceful, sustained contraction lacks even partial relaxation
  8. 9. response A skeletal muscle fiber normally does not contract partially; if it contracts at all, it contracts fully
  9. 13. debt The amount of oxygen liver cells require to convert the accumulated lactic acid into glucose, plus the amount muscle cells require to restore ATP and creatine phosphate to their original concentrations
  10. 14. Layers of fibrous connective tissue; which separate an individual skeletal muscles from adjacent muscles and hold it in position
  11. 15. filament model
  12. 16. period The delay between the time the stimulus was applied and the time the muscle fiber responded Tetanic contraction(tetanus)
  13. 18. stimulus Minimal strength to cause a contraction
  14. 19. junction Connective between the motor neuron and the muscle fiber
  15. 20. Segment of a myofibril that extends from one Z line to the next Z line
  16. 21. neuron Axon from a nerve cell
  17. 24. Muscles that contract and assist the prime mover
  18. 28. impulse Much like a nerve impulse
  19. 29. A muscle is mounted in a special device and when it contracts it pulls on a lever and the movement is recorded on this
  20. 31. reticulum Within the sarcoplasm of a muscle fiber, Network of membranous channels that surround each myofibril and run parallel to it
  21. 33. A neurotransmitter that stimulates skeletal muscle fibers to contract
  22. 34. A muscle exercised strenuously for a prolonged period may lose its ability to contract
  23. 37. tubules Another type of membranous channels, extends inward as invaginations from the fibers membrane and passes all the way through the fiber
  24. 39. tone Even when a muscle appears to be at rest, it's fibers undergo some sustained contraction