Topic 4: Muscular System

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Across
  1. 3. The graph of the contractile activity of a muscle
  2. 5. This consists of a single motor neuron and all the muscle fibers that it innervates.
  3. 6. The ion that binds to troponin.
  4. 11. The movement(s) when the muscle shortens
  5. 14. Movement of substances across the cell membrane that require ATP.
  6. 17. the point at which muscle metabolism switches from aerobic to anerobic.
  7. 18. This ion is concentrated inside the cell.
  8. 20. The preferred fuel for muscle contraction.
  9. 21. The ability to respond to a stimulus
  10. 24. A bundle of of muscle fibers
  11. 28. The functional unit of the muscle
  12. 29. Dense irregular connective tissue that covers the entire muscle
  13. 31. A regulatory protein that blocks actin binding sites when the muscle is resting
  14. 32. These muscle fibers are anaerobic and fatigue quickly.
  15. 34. The voltage that can be measured across the plasma membrane of excitable cells.
  16. 35. The sarcomere extends from ___ to ___.
  17. 36. In smooth muscle, fibers contract together and are attached by gap junctions.
  18. 38. When myosin heads move the thin filament across the thick filaments.
  19. 39. The rate of stimulation.
  20. 40. A prolonged, smooth contraction that results from rapid stimulation.
  21. 42. A reduction in muscle size.
Down
  1. 1. the Na/K pump transports 3 ____ and 2 potassium ions across the cell membrane.
  2. 2. A muscle contraction that changes the length of the muscle and moves a load.
  3. 4. An autoimmune disease in which there is a reduction in the number of Ach receptors.
  4. 7. All muscles are in a slightly contracted state.
  5. 8. The force exerted by a muscle on a load.
  6. 9. A muscle that assists the prime mover.
  7. 10. A muscle that stabilizes the bone of origin of the muscle.
  8. 12. Muscle type that is faintly striated cells which contain intercalated discs, found in the heart
  9. 13. This muscle is attached to bone.
  10. 15. Most muscle in the body are in this class of lever system.
  11. 16. This is made primarily of myosin.
  12. 19. A T-tubule bounded by two SR terminal cisternae.
  13. 22. As the ____ increases, velocity and duration decrease.
  14. 23. Plasma membrane of a muscle cell
  15. 25. The ability to stretch without damage.
  16. 26. In smooth muscle, calcium binds to this protein.
  17. 27. A rigid structure that moves about a fixed point.
  18. 30. Large sub-cellular structures that extend the length of a skeletal muscle
  19. 33. The neurotransmitter stored in vesicles in the axon terminal.
  20. 37. Type of isotonic contraction where the muscle lengthens.
  21. 41. Extension of the sarcolemma that extend into the cell