Which Best Describes Muscle Action

Which best describes muscle action?

A) a nerve stimulus causes the muscle to jerk as a reflex response.
B) a nerve stimulus releases ATP to provide energy for muscle contraction.
C) the release of acetylcholine from the nerve junction flows across the muscle cell and the calcium released causes the actin and myosin molecules to spread apart.
D) myosin and actin molecules will use ATP and catch-pull-release as long as nerve stimuli prevent troponin from blocking the action.
E) none of the choices are correct.

Correct Answer:

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