Topic: Locomotion: movement types, muscle contraction· Human Physiology
Calcium is important in skeletal muscle contraction because it
1. binds to troponin to remove the masking of active sites on actin for myosin.
2. detaches the myosin head from the actin filament.
3. activates the myosin ATPase by binding to it.
4. prevents the formation of bonds between the myosin cross bridges and the actin filament.