Physiology of Muscle Contraction

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Across
  1. 3. the protein to which calcium ions bind during muscle contraction
  2. 6. the cytoplasm of a muscle cell
  3. 7. organelle that is the source of ATP for muscle contraction
  4. 8. the type of neuron that transmits an action potential to a muscle cell
  5. 9. bind to troponin to expose binding sites for myosin (2 words)
  6. 10. neurotransmitter that triggers muscle cell contraction
  7. 11. muscle cell membrane
  8. 13. the point of contact between a motor neuron and a muscle fiber (3 words)
  9. 15. the microscopic gap between an axon terminal and the membrane of a muscle cell (2 words)
  10. 16. the protein within a thin filament that blocks the binding sites for myosin
  11. 17. protein that forms the thin filaments of a muscle fiber
Down
  1. 1. one source of energy for muscle contraction
  2. 2. _____ reticulum, the ER of a muscle cell
  3. 4. _____ junction; the junction between a neuron and a muscle cell
  4. 5. the unit of muscle contraction
  5. 10. another term for an electrical impulse traveling along a neuron or muscle cell membrane (2 words)
  6. 12. protein that forms the thick filaments of a muscle fiber
  7. 14. a protein molecule in a cell membrane that acts as an "antenna" for receiving chemical signals