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Put the steps of muscle contraction in order from first (1) to last (5). The sarcomere shortens. Calcium ions are released by a nerve cell. The sarcomere is relaxed. Actin and myosin overlap completely.
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Put the steps of muscle contraction in order from first (1) to last (5).

The sarcomere shortens.

Calcium ions are released by a nerve cell.

The sarcomere is relaxed.

Actin and myosin overlap completely.

Actin and myosin are activated.

User Noam Manos
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The answer to this question..... is D (Actin and myosin are completely overlapped.)

User Zibib
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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:

User Zrisher
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