Muscular System

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Across
  1. 5. Upper arm muscle responsible for Extension of the elbow.
  2. 8. Protein that helps regulate muscle contraction by binding calcium.
  3. 9. Actin and myosin are ____?
  4. 12. The cell membrane surrounding a muscle fiber.
  5. 17. The basic unit of muscle contraction.
  6. 18. Protein that blocks actin binding sites during relaxation.
  7. 19. Lifting the foot.
  8. 20. Thin filament in muscular contraction.
  9. 21. Upper arm muscle responsible for Flexion of the elbow.
  10. 22. Exercise or activity requiring oxygen
  11. 23. Thick filament in muscular contraction.
  12. 24. Decreasing angle of a limb such as the elbow.
  13. 25. Connective tissue surrounding an entire muscle.
  14. 27. Released to trigger muscle contraction by binding to troponin.
  15. 28. Muscle that forms a diamond shape on the back.
  16. 29. Neurotransmitter released at the neuromuscular junction.
  17. 30. Forms a junction with the sarcolemma of a muscle cell.
Down
  1. 1. Organelle that stores calcium ions in muscle cells.
  2. 2. The connection formed between actin and myosin during contraction.
  3. 3. Increasing the angle of a limb such as the elbow.
  4. 4. Connection where nerve and muscle fibers communicate.
  5. 6. First source of energy to be depleted.
  6. 7. The gap between a neuron and a muscle cell where neurotransmitters are released.
  7. 10. Movement of a limb away from the midline.
  8. 11. Filled with a chemical messenger known as a neurotransmitter.
  9. 13. Exercise or activity that doesn’t require oxygen, used for quick, intense effort.
  10. 14. Electrical signal that travels along nerves to trigger muscle contraction.
  11. 15. Energy molecule required for muscle contraction and relaxation.
  12. 16. Connective tissue surrounding bundles of muscle fibers (fascicles).
  13. 26. Movement of a limb towards the midline.