PNB 2274: EXAM IV (AUTONOMIC
NERVOUS SYSTEM) EXAM 2025
QUESTIONS AND ANSWERS
Unlike skeletal system your autonomic nervous system has ______ neurons connected in series.
They are called ________ and ________. - ANS two!
Preganglionic
postganglionic
Sympathetic - ANS fight or flight
parasympathetic - ANS rest and digest
dual innervation - ANS paired inervation of target organs by sympathetic and
parasympathetic systems
Where do sympathetic preganglionic cells originate from? - ANS T1-L2
where do sympathetic preganglionic cells go to? - ANS A) Sympathetic Chain
B) Collateral
C) Adrenal
Where do sympathetic postganglionic cells come from? - ANS Sympathetic chain ganglia,
collateral ganglia
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, A _____________ is simply a collection of neuron cell bodies in the peripheral nervous system.
The cell bodies of postsynaptic autonomic neurons are located in ___________ throughout the
body. Sensory ___________, such as dorsal root ___________, are collections of sensory
neuron cell bodies, but NO synapses occur there. - ANS Ganglia
Sympathetic Chain ganglia - ANS located on both sides of spinal cord
inervate heart, lungs, head
Collateral ganglia - ANS (supporting sympathetic sorta) stomach, pancreas, liver
Prevertabral b/c right in front of vertabrae
Adrenal Medulla - ANS inner parts of adrenal glands
modified sympatheic ganglion
preganglion sysnapse in this region and release Ach
causes hormone release
Cromaffin cells - ANS release 80% of epinephriene
resemble post ganglionic cells, release norepinephreine and epinephrine
(only sympathetic)
Where do parasympathetic preganglionic cells come from? - ANS 3,7,9,10 (III) oculomotor,
(VII) Facial, (IV) Glossopharyngeal, X (Vagus)
and S2, S3, S4
where do 90% of parasympathetic preganglionic cells come from? - ANS Vagus nerve
Parasympathetic _______ganglionic neurons are longer whereas sympathetic
________ganglionic axons are longer - ANS preganglionic are longer in parasympathetic and
post ganglionic are longer in sympathetic
Copyright ©2025 BRIGHTSTARS ALL RIGHTS RESERVED 2
NERVOUS SYSTEM) EXAM 2025
QUESTIONS AND ANSWERS
Unlike skeletal system your autonomic nervous system has ______ neurons connected in series.
They are called ________ and ________. - ANS two!
Preganglionic
postganglionic
Sympathetic - ANS fight or flight
parasympathetic - ANS rest and digest
dual innervation - ANS paired inervation of target organs by sympathetic and
parasympathetic systems
Where do sympathetic preganglionic cells originate from? - ANS T1-L2
where do sympathetic preganglionic cells go to? - ANS A) Sympathetic Chain
B) Collateral
C) Adrenal
Where do sympathetic postganglionic cells come from? - ANS Sympathetic chain ganglia,
collateral ganglia
Copyright ©2025 BRIGHTSTARS ALL RIGHTS RESERVED 1
, A _____________ is simply a collection of neuron cell bodies in the peripheral nervous system.
The cell bodies of postsynaptic autonomic neurons are located in ___________ throughout the
body. Sensory ___________, such as dorsal root ___________, are collections of sensory
neuron cell bodies, but NO synapses occur there. - ANS Ganglia
Sympathetic Chain ganglia - ANS located on both sides of spinal cord
inervate heart, lungs, head
Collateral ganglia - ANS (supporting sympathetic sorta) stomach, pancreas, liver
Prevertabral b/c right in front of vertabrae
Adrenal Medulla - ANS inner parts of adrenal glands
modified sympatheic ganglion
preganglion sysnapse in this region and release Ach
causes hormone release
Cromaffin cells - ANS release 80% of epinephriene
resemble post ganglionic cells, release norepinephreine and epinephrine
(only sympathetic)
Where do parasympathetic preganglionic cells come from? - ANS 3,7,9,10 (III) oculomotor,
(VII) Facial, (IV) Glossopharyngeal, X (Vagus)
and S2, S3, S4
where do 90% of parasympathetic preganglionic cells come from? - ANS Vagus nerve
Parasympathetic _______ganglionic neurons are longer whereas sympathetic
________ganglionic axons are longer - ANS preganglionic are longer in parasympathetic and
post ganglionic are longer in sympathetic
Copyright ©2025 BRIGHTSTARS ALL RIGHTS RESERVED 2
