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