Across
- 4. modified endoplasmic reticulum that stores calcium
- 6. binds to myosin head releasing myosin from actin crossbridge
- 8. a short segment of a myofibril, bound by Z lines
- 9. thick myofilament, many heads stick out
- 10. thin myofilament, looks like a double strand of pearls
Down
- 1. Actin and myosin
- 2. connects myosin filament to Z line
- 3. covers binding sites on actin (unless calcium is bound to troponin)
- 5. binds to troponin
- 7. like a “bracket” holding tropomyosin in place over actin binding sites