Muscular System

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Across
  1. 3. helps regenerate ATP, ____phosphate
  2. 4. muscle fiber membrane
  3. 7. minimal level of stimulus to cause a contraction
  4. 9. bundle of muscle fibers
  5. 11. type of muscle that makes up the heart
  6. 12. this superhero has huge muscles when he's angry
  7. 13. explains how muscle contraction works; sliding__theory
  8. 15. when muscles become tired
  9. 17. thin filaments of a muscle fiber
  10. 18. store neurotransmitters
  11. 21. individual muscle fiber
  12. 23. organelle that provides the energy for muscle contraction
  13. 24. thick filaments of muscle fiber
Down
  1. 1. type of muscles that connects to bones, voluntary
  2. 2. describes muscles that are striped in apperance
  3. 5. neurotransmitter used to cause muscle contraction
  4. 6. outermost layer, surrounds entire muscle
  5. 8. channels that surround the myofibrils; sarcoplasmic ___
  6. 10. connects bones to other bones
  7. 11. space between a neuron and the muscle, synaptic__
  8. 14. overlapping patterns of actin and myosin; I and A __
  9. 16. surrounds fascicles
  10. 19. type of muscle found in the digestive tract, involuntary
  11. 20. connects muscles to bones
  12. 22. section of a myofibril from one Z line tot he next Z line