Muscle System Review Crossword

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Across
  1. 3. Bundle of muscle fibers
  2. 7. Individual muscle fiber
  3. 8. Space between a neuron and the muscle; synaptic _____
  4. 14. Helps regenerate ATP
  5. 16. Minimum stimulus to cause contraction
  6. 17. Thin filaments of muscle fiber
  7. 18. Describes muscles that are striped in appearance
  8. 19. Section of a myofibril from one Z line to the next Z line
  9. 22. Theory that explains how muscle contractions work: sliding _ theory
  10. 24. Connects muscle to bone
Down
  1. 1. Neurotransmitter used to cause muscle contractions
  2. 2. Stores neurotransmitters
  3. 4. Type of muscle responsible for movement
  4. 5. Muscle fiber membrane
  5. 6. Thick filaments of muscle fiber
  6. 9. Tissue surrounding fasicles
  7. 10. Type of muscle that lines the digestive tract; involuntary
  8. 11. Organelle responsible for producing energy needed for muscle contraction
  9. 12. Outermost layer; covers the entire muscle
  10. 13. membranous channels that surround the myofibrils; Sarcoplasmic ______
  11. 15. Overlapping patterns of actin and myosin; I and A ____
  12. 20. Type of muscle that makes up the heart
  13. 21. Connects bone to bone
  14. 23. When muscles become tired