Excitation Phase of Muscle Contraction: Match the steps of the excitation
phase of muscle contraction according to the most likely numerical order in
which they might occur.
✓ [Choose]
Cinderella's hand accidentally touches a hot ember as she adds more wood to the fire.
Voltage gates open on the synaptic bulbs and calcium ions rush into the bulbs.
An action potential is started in several motor neurons and it reaches the synaptic bulbs.
Acetylcholine binds to ligand gates on the motor endplates of Cinderella's bicep brachii muscle cells
Acetylcholine is released by exocytosis into the neuromuscular junction.