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What is Which of the following is true about autonomic nervous system? and explain in detail?
The sympathetic preganglionic fibers leave the spinal cord with ventral roots of spinal cord between first thoracic and second lumbar segment called thoracolumbar divison. The nerve fibers leaving the CNS from the brain and sacral poion of spinal cord is III, VII, IX and X cranial nerves and second and fouh spinal nerves. Hollow viscera like stomach have dual innervation from both sympathetic and parasympathetic division: hypogastric plexu. This enables a very fine degree of control over the effect or organ .