The answer to this question..... is D (Actin and myosin are completely overlapped.)
Answer:
- 4 The sarcomere shortens.
-2 Calcium ions are released by a nerve cell.
- 1 The sarcomere is relaxed.
- 5 Actin and myosin overlap completely.
- 3 Actin and myosin are activated.
Step-by-step explanation:
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