Identify the first and last step of muscle contraction cycle: (a) Myosin head binds to exposed active site on actin (b) Ca2+ binds to troponin (c) Release of ADP and Pi, causing myosin head to pivot (d) Cross bridge detachment due to ATP binding
- AFirst: (a), Last: (d)
- BFirst: (b), Last: (d)
- CFirst: (b), Last: (c)
- DFirst: (a), Last: (c)
✓ Correct answer: A
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