put the steps of muscle contraction in order from first (1) to last (5).\nthe sarcomere shortens.\ncalcium…

put the steps of muscle contraction in order from first (1) to last (5).\nthe sarcomere shortens.\ncalcium ions are released by a nerve cell.\nthe sarcomere is relaxed.\nactin and myosin overlap completely.\nactin and myosin are activated.

put the steps of muscle contraction in order from first (1) to last (5).\nthe sarcomere shortens.\ncalcium ions are released by a nerve cell.\nthe sarcomere is relaxed.\nactin and myosin overlap completely.\nactin and myosin are activated.

Answer

Brief Explanations:

Muscle contraction starts with a relaxed state. A nerve - cell releases calcium ions which activate actin and myosin. Then, actin and myosin overlap completely causing the sarcomere to shorten.

Answer:

  1. The sarcomere is relaxed.
  2. Calcium ions are released by a nerve cell.
  3. Actin and myosin are activated.
  4. Actin and myosin overlap completely.
  5. The sarcomere shortens.