Preganglionic sympathetic neurons originate from the thoracolumbar region of the spinal cord and synapse at sympathetic ganglia, often in paravertebral locations. These shorter neurons connect to postganglionic neurons that extend to effector organs throughout the body. The interaction between preganglionic and postganglionic neurons is crucial for the functioning of the sympathetic nervous system.

1. Preganglionic sympathetic neurons and postganglionic sympathetic neurons synapse at the
______ parasympathetic ganglion autonomic plexus sympathetic ganglion dorsal root
ganglion thoracolumbar spinal cord
Solution
Sympathetic ganglion. The shorter preganglionic neurons originate from the thoracolumbar
region of the spinal cord specially at T1 to L2-L3 and travel to a sympathetic ganglion, often one
of the paravertebral ganglia, where they synapse with a post ganglionic neurons extend across
most of the body. Preganglionic nerves from the spinal cord synapse at one of the chain ganglia,
and the postganglionic fiber extends to an effector organ.