Muscle physiology terminology

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Across
  1. 1. Basic repeating units that make up myofibrils
  2. 5. Region of sarcomere composed of thick filaments
  3. 6. Mechanical response of a muscle to a single action potential
  4. 8. Adding together of twitches that occur when a muscle is stimulated at high frequency
  5. 11. Immediate high-energy molecule in muscle (2 words)
  6. 12. A plateau phase of muscle contraction
  7. 15. Bundles of muscle fibres
  8. 16. Found in thick filaments in muscle fibres
  9. 17. Part of thick filaments responsible for producing motion that causes muscle contraction
  10. 20. Twitch during which a muscle shortens and lifts a constant load
  11. 22. Rodlike elements that contain a muscle's contractile machinery
  12. 23. Type of muscle cells that are used in endurance exercise (2 words)
  13. 25. Type of muscle fibre with high myosin ATPase activity (2 words)
  14. 27. Lengthening muscle contraction
  15. 28. An increase in the number of active neurons
  16. 29. Type of muscle that is connected to bone (2 words)
  17. 33. Decrease in muscle's ability to produce force
  18. 34. Muscle contraction with no change in length
  19. 36. Protein that binds calcium and initiate the crossbridge cycle
Down
  1. 1. Organelle in muscle fibres that stores calcium (2 words)
  2. 2. Type of filaments composed of actin
  3. 3. Plasma membrane of muscle fibres
  4. 4. Process of muscle contraction whereby thick and thin filaments move past each other (2 words)
  5. 7. Region of sarcomere with no overlapping filaments
  6. 9. Structure that transmits action potentials from the sarcolemma into the cell's interior (2 words)
  7. 10. Mechanism that drives muscle contraction (2 words)
  8. 13. The relationship between the size of motor units and the order of recruitment (2 words)
  9. 14. Found in thin filaments in muscle fibres
  10. 18. Type of muscle found in internal organs
  11. 19. Protein that blocks myosin-binding sites on thin filaments
  12. 21. Shortening muscle contraction
  13. 24. Type of muscle fibre with high myoglobin content (2 words)
  14. 26. Time between a stimulus and a response (2 words)
  15. 30. An oxygen-binding protein found in some muscle fibres
  16. 31. Type of filaments composed of myosin
  17. 32. A motor neuron and all of the fibres it innervates (2 words)
  18. 35. Region of sarcomere composed of thin filaments