PHRM 4300: Nervous System EXAM QUESTIONS
WITH ANSWERS VERIFIED 100% CORRECT
What are the components of the CNS? - ✔✔brain, spinal cord, and retina
What are the components of the PNS? - ✔✔all nerves that lie outside the brain and spinal
cord, including the cranial nerves and spinal nerves
somatic nervous system - ✔✔part of the peripheral nervous system - voluntary movement
and reflex movements
autonomic nervous system - ✔✔part of the peripheral nervous system - involuntary
regulation of HR, BP, respiration, digestion
sensory neurons - ✔✔aka afferent; nerve cells activated by sensory input from the
environment, corresponding to the 5 senses
motor neurons - ✔✔aka efferent; part of PNS; connect to muscles, glands, organs; transmit
impulses from the spinal cord to skeletal and smooth muscles
lower motor neurons - ✔✔travel from spinal cord to muscle
upper motor neurons - ✔✔travel between brain and spinal cord
interneurons - ✔✔connect spinal motor and sensory neurons
efferent neurons - ✔✔carry motor information from brain to PNS
, afferent neurons - ✔✔carry sensory info from PNS to brain
How do the upper and lower motor neurons work together? - ✔✔must synapse to carry the
message to the CNS or PNS
ALS - ✔✔amyotrophic lateral sclerosis - most common motor neuron disease
What are the symptoms of motor neuron disease? - ✔✔muscle wasting, weakness, difficulty
moving with coordination, difficulty breathing
Which nerves are responsible for the sensory and motor functions of the head and neck? -
✔✔cranial nerves (originate from the brain)
vagus nerve - ✔✔cranial nerve X; targets organs in the thoracic and abdominal cavities as
part of the parasympathetic nervous system
Which cranial nerve does not innervate the head/neck? - ✔✔vagus nerve - X
EOM - ✔✔extra ocular movement
PERRLA - ✔✔pupils are equally round and reactive to light and accommodation
What are the 4 regions of the spinal cord? - ✔✔cervical, thoracic, lumbar, sacral
The bodies of adjacent vertebrae are separated and united by - - ✔✔intervertebral discs
What is the purpose of the intervertebral discs? - ✔✔padding and movements between
adjacent vertebrae
WITH ANSWERS VERIFIED 100% CORRECT
What are the components of the CNS? - ✔✔brain, spinal cord, and retina
What are the components of the PNS? - ✔✔all nerves that lie outside the brain and spinal
cord, including the cranial nerves and spinal nerves
somatic nervous system - ✔✔part of the peripheral nervous system - voluntary movement
and reflex movements
autonomic nervous system - ✔✔part of the peripheral nervous system - involuntary
regulation of HR, BP, respiration, digestion
sensory neurons - ✔✔aka afferent; nerve cells activated by sensory input from the
environment, corresponding to the 5 senses
motor neurons - ✔✔aka efferent; part of PNS; connect to muscles, glands, organs; transmit
impulses from the spinal cord to skeletal and smooth muscles
lower motor neurons - ✔✔travel from spinal cord to muscle
upper motor neurons - ✔✔travel between brain and spinal cord
interneurons - ✔✔connect spinal motor and sensory neurons
efferent neurons - ✔✔carry motor information from brain to PNS
, afferent neurons - ✔✔carry sensory info from PNS to brain
How do the upper and lower motor neurons work together? - ✔✔must synapse to carry the
message to the CNS or PNS
ALS - ✔✔amyotrophic lateral sclerosis - most common motor neuron disease
What are the symptoms of motor neuron disease? - ✔✔muscle wasting, weakness, difficulty
moving with coordination, difficulty breathing
Which nerves are responsible for the sensory and motor functions of the head and neck? -
✔✔cranial nerves (originate from the brain)
vagus nerve - ✔✔cranial nerve X; targets organs in the thoracic and abdominal cavities as
part of the parasympathetic nervous system
Which cranial nerve does not innervate the head/neck? - ✔✔vagus nerve - X
EOM - ✔✔extra ocular movement
PERRLA - ✔✔pupils are equally round and reactive to light and accommodation
What are the 4 regions of the spinal cord? - ✔✔cervical, thoracic, lumbar, sacral
The bodies of adjacent vertebrae are separated and united by - - ✔✔intervertebral discs
What is the purpose of the intervertebral discs? - ✔✔padding and movements between
adjacent vertebrae
