Use choices from the following word bank to fill in the blanks:
Calcium ions, Myosin, Action potential, ATP, Acetylcholine, Troponin, Synaptic cleft, T-tubules, Motor end plate, Axon
An action potential travels down the axon of the motor neuron until it reaches the motor end plate. The action potential causes the release of acetylcholine from the presynaptic terminal. Acetylcholine diffuses across the synaptic cleft and binds to its receptors on the motor end plate. This binding creates an action potential, which travels down the sarcolemma and down the T-tubules to the terminal cisternae of the sarcoplasmic reticulum.