Muscle Physiology

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Across
  1. 4. shape of actin double stranded in helix
  2. 6. myosin tails are in the ______
  3. 7. myosin molecule is composed of 2 ____ chains
  4. 9. skeletal muscle account for 50-75% of all body ____
  5. 10. myosin filament is ____, cross bridges are displaced from previous set by 120 degrees
  6. 12. bundles of muscle fibers enclosed by perimysium
  7. 15. has complex of 3 protein subunits & may attach tropomyosin to actin
  8. 16. the shape of actin that is like pearls and polymerizes
  9. 17. each actin is 1 _______ long
  10. 18. primary protein in thin filament
  11. 19. each G-actin has an ADP molecule attached to it
  12. 20. t-tubule and 2 terminal cisternae
Down
  1. 1. muscles are 75% ____
  2. 2. actin filaments extending from either side
  3. 3. one of these goes from Z-line to Z-line
  4. 5. cytoplasm of muscle cell
  5. 8. 13 G-actin molecules in each revolution of the ____ strand
  6. 11. under fascia in skeletal muscle
  7. 13. myosin molecule has 6 ____ chains
  8. 14. end with sac-like cistern which stores Ca2+
  9. 15. loosely connected to the F-actin strands