Which of the following correctly describes the order of events occurring during a sympathetic nervous system response?
stimulation of cranial or sacral spinal regions; impulse reaches cranial root ganglion; acetylcholine release
stimulation of cranial or sacral spinal regions; impulse reaches cranial root ganglion; norepinephrine release
stimulation of thoracic or lumbar spinal regions; impulse reaches chain ganglion; acetylcholine release
stimulation of thoracic or lumbar spinal regions; impulse reaches chain ganglion; norepinephrine release

Answer;

Stimulation of thoracic or lumbar spinal regions; impulse reaches chain ganglion; acetylcholine release

Explanation;The sympathetic nervous system is part of the autonomic nervous system, which also includes the parasympathetic nervous system.The sympathetic nervous system  functions by activating the fight or flight responses. It operates through a series of interconnected neurons. Sympathetic neurons of the spinal cord communicate with the PNS via a series of sympathetic ganglia. Spinal cord sympathetic neurons joins with the peripheral sympathetic neurons through the chemical synapses.At synapses, preganglionic sympathetic neurons release acetylcholine, which binds and activates nicotinic acetylcholine receptors on the postganglionic neurons.

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