Skeletal Muscles

123456789101112
Across
  1. 3. Lighter-coloured region where myosin and actin don't overlap
  2. 5. Forms fibrous strand around actin filament
  3. 6. Darker-coloured region where myosin and actin overlap
  4. 7. Fibres that have slower, weaker but longer lasting effects
  5. 11. Long rod-shaped fibres wioth projecting bulbous heads
  6. 12. line in the centre of the I band
Down
  1. 1. Two strands twisted around each other
  2. 2. Fibres that have quicker, stronger but shorter lasting effects
  3. 4. Tiny muscle fibres
  4. 7. Cytoplasm of muscle fibres full of mitochondria and ER
  5. 8. Globular protein involved in muscle contraction
  6. 9. The distance between two adjacent Z lines
  7. 10. Lighter-coloured region at the centre of the A band