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In addition, the neurotransmitter can bind to any one of the nearby smooth muscle cells, a flexibility not found in the NMJ. The chemicals that influence smooth muscle cells: As you'll recall, there is only one neurotransmitter released at the neuromuscular junction-acetylcholine.
Acetylcholine is the neurotransmitter used by the motor neurons to stimulate action potentials in the muscle cells. When an action potential reaches the end of a neuron, the acetylcholine is released and a new action potential begins in the muscle tissue. Nerves connecting to muscles are called motor neurons. Each neuromuscular junction is connected to a bundle of muscle fibers. A motor neuron may branch several times and connect to several bundles. All of these bundles will contract together upon getting a signal from the motor neuron.