Somatic neurons and autonomic preganglionic neurons release the neurotransmitter acetylcholine from their axon terminals. - TRUE
- The peripheral nervous system has acetylcholine neurons in every area. Acetylcholine is released into skeletal muscle by motor neurons in the somatic nervous system.
- Since they terminate in skeletal muscle, they are often referred to as motor neurons.
- They are just excitatory, that is, they only cause the muscle to contract, and they release the neurotransmitter acetylcholine within the muscle fibers.
- Acetylcholine is released when an action potential is conveyed to the axon terminal, where depolarization causes voltage-gated calcium channels to open and enable an influx of calcium, which then permits the release of acetylcholine-containing vesicles into the synaptic cleft.
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