Exam 2

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Across
  1. 4. chemical released by nerve cells
  2. 7. groups of specialized cells that are similar in structure and perform common functions
  3. 10. break down ATP quickly, contract quickly
  4. 14. multiple layers of cells (strata)
  5. 15. requires conscious control over activity
  6. 16. single layer of cells
  7. 17. produce blood cells
Down
  1. 1. covers entire outer surface of muscle
  2. 2. contractile protein filament (thin)
  3. 3. break down ATP slowly, contract slow
  4. 5. attaches muscle to bone
  5. 6. functions without conscious thought or stimulation by nerves
  6. 8. only connective tissue that doesn't have matrix
  7. 9. primarily fat utilized for energy
  8. 11. stimulate contraction of skeletal muscle cells
  9. 12. smallest unit of muscle that can contract
  10. 13. attach bone to bone
  11. 18. contractile protein filament (thick)