Answer:
Acetylcholine
Explanation:
A neurotransmitter are neuron generated chemical message carriers that transmits signals over the synaptic cleft
The neurons releases neurotransmitters as a response to a presynaptic neuron axon terminal depolarization
Neurotransmitters function by exciting or inhibiting a response when they are bound to post-synaptic cell receptors thereby based on the the kind of post-synaptic cell can lead to an array of response
Acetylcholine is a neurotransmitter released at the junctions between nerves and muscles and aids in the initiating contraction of the muscles
Excessive stimulation by Acetylcholine due to lack of removal from the synapses can be fatal.