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| Q. |
Regarding excitation-contraction coupling in skeletal muscle, which statement is INCORRECT? |
| A. | calcium ions bind to troponin T |
| B. | troponin I – tropomyosin complex constitutes a “relaxing protein” |
| C. | each cycle of attachment and detachment shortens muscle length by about 1% |
| D. | ATP is the immediate source of energy |
| E. | globular head of myosin – II possesses actin binding site |
| Answer» A. calcium ions bind to troponin T | |
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