APEX-ANS ANATOMY AND PHYSIOLOGY EXAM
QUESTIONS |GUARANTEED ACCURATE ANSWERS |
LATEST VERSION 2026
The entire CNS is made up of what things?-Accurate answer Spinal cord
Medulla
Pons
Midbrain
Thalamus
Cerebral Hemispheres
What are the 2 divisions of the autonomic nervous system?-Accurate answer SNS
—fight or flight
PNS
—rest + digest
In both the SNS and PNS:
—preganglionic neurons are what type of fibers?
—postganglionic neurons are what type of fibers?-Accurate answer Preganglionic
—Type B,lightly myelinated
Postganglionic — Type C Unmyelinated
Where does the SNS preganglionic neurons originate?
Where do the cell bodies lie?-Accurate answer "Thoracolumbar"
From T1-L2
,Cell bodies are located within the LATERAL horn of the spinal cord grey matter
from the above spinal regions
—Intermediolateral nucleus (Lamina of Rexed 7)
Where does the PNS preganglionic neurons originate?-Accurate answer
"Craniosacral" Division
Cranial nerves 3,7,9,.+10 and S2-S4
Cell bodies in the lateral horn of spinal cord grey matter (LR7)
In the autonomic nervous system: (answer short / long)
—The SNS preganglionic are __________ and post ganglionic are_____________
—The PNS preganglionic are ____________and post ganglionic are
_____________-Accurate answer SNS:
—pre—short
—post —long
PNS:
—Pre—long
—post—short
Where does the somatic nervous system preganglionic neurons originate?
What is the difference between the autonomic and somatic neurons when it comes
to number of neurons.-Accurate answer From the Ventral horn of the spinal cord
(grey matter) from each spinal section.
—Lamina of rexed 8 or 9
With the somatic (motor) nervous system, there is only ONE neuron from the
spinal cord to its target effector— the NMJ (lower motor neuron)
, In the autonomic nervous system, there is a preganglionic and post ganglionic
neuron.
In the SNS, the axons of nerves exit the ___(ventral/dorsal)__ root and seperate
shortly after to form the __________________.
Why is it called this?
Where are these present?-Accurate answer Ventral
White Rami.
—white rami are myelinated
Only present from T1-L2 because all preganglionic SNS fibers originate here.
Describe the SNS route (route 1)from spinal cord to effector on same spinal level-
Accurate answer Exit spinal cord
—> Enter into white rami communicans
—>Synapse in sympathetic ganglionic trunk
—>post ganglionic neuron (c fiber) exits via grey rami
—>exits spinal nerve to synapse with effector on same spinal nerve level.
How many pairs of sympathetic ganglia are there?-Accurate answer 3 Cervical
—superior, middle, and inferior
11-12 Thoracic
3-5 Lumbar
3-5 Sacral
1 Coccygeal
QUESTIONS |GUARANTEED ACCURATE ANSWERS |
LATEST VERSION 2026
The entire CNS is made up of what things?-Accurate answer Spinal cord
Medulla
Pons
Midbrain
Thalamus
Cerebral Hemispheres
What are the 2 divisions of the autonomic nervous system?-Accurate answer SNS
—fight or flight
PNS
—rest + digest
In both the SNS and PNS:
—preganglionic neurons are what type of fibers?
—postganglionic neurons are what type of fibers?-Accurate answer Preganglionic
—Type B,lightly myelinated
Postganglionic — Type C Unmyelinated
Where does the SNS preganglionic neurons originate?
Where do the cell bodies lie?-Accurate answer "Thoracolumbar"
From T1-L2
,Cell bodies are located within the LATERAL horn of the spinal cord grey matter
from the above spinal regions
—Intermediolateral nucleus (Lamina of Rexed 7)
Where does the PNS preganglionic neurons originate?-Accurate answer
"Craniosacral" Division
Cranial nerves 3,7,9,.+10 and S2-S4
Cell bodies in the lateral horn of spinal cord grey matter (LR7)
In the autonomic nervous system: (answer short / long)
—The SNS preganglionic are __________ and post ganglionic are_____________
—The PNS preganglionic are ____________and post ganglionic are
_____________-Accurate answer SNS:
—pre—short
—post —long
PNS:
—Pre—long
—post—short
Where does the somatic nervous system preganglionic neurons originate?
What is the difference between the autonomic and somatic neurons when it comes
to number of neurons.-Accurate answer From the Ventral horn of the spinal cord
(grey matter) from each spinal section.
—Lamina of rexed 8 or 9
With the somatic (motor) nervous system, there is only ONE neuron from the
spinal cord to its target effector— the NMJ (lower motor neuron)
, In the autonomic nervous system, there is a preganglionic and post ganglionic
neuron.
In the SNS, the axons of nerves exit the ___(ventral/dorsal)__ root and seperate
shortly after to form the __________________.
Why is it called this?
Where are these present?-Accurate answer Ventral
White Rami.
—white rami are myelinated
Only present from T1-L2 because all preganglionic SNS fibers originate here.
Describe the SNS route (route 1)from spinal cord to effector on same spinal level-
Accurate answer Exit spinal cord
—> Enter into white rami communicans
—>Synapse in sympathetic ganglionic trunk
—>post ganglionic neuron (c fiber) exits via grey rami
—>exits spinal nerve to synapse with effector on same spinal nerve level.
How many pairs of sympathetic ganglia are there?-Accurate answer 3 Cervical
—superior, middle, and inferior
11-12 Thoracic
3-5 Lumbar
3-5 Sacral
1 Coccygeal
