Q. Regarding excitation-contraction coupling in skeletal muscle, which statement isINCORRECT? (Solved)
1. calcium ions bind to troponin T
2. troponin I – tropomyosin complex constitutes a “relaxing protein”
3. each cycle of attachment and detachment shortens muscle length by about 1%
4. ATP is the immediate source of energy
5. globular head of myosin – II possesses actin binding site
- a. calcium ions bind to troponin T