Place these steps of muscle contraction in the correct order.
1) Action potential is generated along the sarcolemma
2) Nerve impulse arrives at synapse
3) Calcium is released into muscle cell cytoplasm
4) Acetylcholine is produced
5) Actin and myosin molecules continuously cross-link, with actin molecules being pulled inward
A) 2, 3, 4, 1, 5
B) 4, 2, 1, 5, 3
C) 1, 2, 4, 3, 5
D) 2, 4, 1, 3, 5
E) 1, 2, 4, 5, 3

Question

Place these steps of muscle contraction in the correct order. 
1) Action potential is generated along the sarcolemma
2) Nerve impulse arrives at synapse
3) Calcium is released into muscle cell cytoplasm
4) Acetylcholine is produced
5) Actin and myosin molecules continuously cross-link, with actin molecules being pulled inward
A) 2, 3, 4, 1, 5
B) 4, 2, 1, 5, 3
C) 1, 2, 4, 3, 5
D) 2, 4, 1, 3, 5
E) 1, 2, 4, 5, 3

Quizplus · Accepted Answer

The correct sequence for muscle contraction starts with the nerve impulse arriving at the synapse (2), followed by the production of acetylcholine (4), which then generates an action potential along the sarcolemma (1). This leads to the release of calcium into the muscle cell cytoplasm (3), enabling the actin and myosin molecules to cross-link and pull the actin molecules inward, resulting in muscle contraction (5).

Place These Steps of Muscle Contraction in the Correct Order