The correct answer is: C) thoracolumbar region, and the postganglionic fibers secrete norepinephrine
The pathway of autonomic nervous system (sympathetic and parasympathetic) involves two:
1. Preganglionic neuron - from CNS (spinal cord or brain) to the autonomic ganglion, all of these fibers release acetylcholine (Ach)
2. Postganglionic neuron - from the autonomic ganglion to the cells of the effector organ, parasympathetic postganglionic fibers release acetylcholine while sympathetic postganglionic fibers release norepinephrine.
