Advanced Pathophysiology Unit 2 Exam
NU 545 : Nervous System & Neuro
Pathophysiology | LATEST UPDATE
2026/2027 (VERIFIED ANSWERS) |ALREADY
GRADED A+/ COLLEGE OF NURSING
Question
A patient sustains a peripheral nerve crush injury. Which feature most strongly
explains why functional recovery may occur?
A) Mature CNS neurons rapidly undergo mitosis
B) Schwann cells provide a pathway that can support axonal regrowth
C) Oligodendrocytes regenerate the entire injured axon
D) Astrocytes eliminate the damaged nerve and replace it
✓✓ Correct Answer: B) Schwann cells provide a pathway that can support
axonal regrowth
Rationale:
Peripheral nerves have greater regenerative potential than CNS nerves. After
injury, Schwann cells participate in removal of damaged tissue and can form a
supportive pathway that guides regenerating axonal sprouts. Regeneration is slow
and depends on factors such as the degree and location of injury, preservation of
connective-tissue structures, and the inflammatory and scarring response.
Question
A patient has damage to a sensory pathway carrying information from the skin
toward the spinal cord. Which term describes this direction of neural
transmission?
A) Efferent
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,B) Afferent
C) Somatic motor
D) Postganglionic
✓✓ Correct Answer: B) Afferent
Rationale:
Afferent pathways carry sensory information toward the CNS. Efferent pathways
carry motor or autonomic output away from the CNS toward an effector. A useful
distinction is “afferent arrives” and “efferent exits.”
Question
Which structure is primarily responsible for coordinating balance, posture, and
smooth voluntary movement?
A) Cerebellum
B) Hypothalamus
C) Hippocampus
D) Medulla
✓✓ Correct Answer: A) Cerebellum
Rationale:
The cerebellum integrates sensory information with motor commands to
coordinate movement, balance, posture, and motor learning. Cerebellar
dysfunction can produce ataxia, impaired coordination, dysmetria, and gait
abnormalities.
Question
A patient understands spoken language but has difficulty producing meaningful
speech after a left cerebral infarction. Which region is most likely damaged?
A) Wernicke area
B) Broca area
C) Occipital cortex
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,D) Primary auditory cortex
✓✓ Correct Answer: B) Broca area
Rationale:
Broca area, located in the dominant inferior frontal region, is involved in motor
aspects of speech production. Damage can cause expressive aphasia, in which the
patient has difficulty producing fluent meaningful language despite relatively
preserved comprehension. Wernicke area is more directly involved in language
comprehension.
Question
Which cerebral region is most closely associated with planning, judgment,
concentration, goal-directed behavior, and inhibition of inappropriate emotional
responses?
A) Prefrontal cortex
B) Occipital cortex
C) Primary motor cortex
D) Cerebellar cortex
✓✓ Correct Answer: A) Prefrontal cortex
Rationale:
The prefrontal cortex participates in executive functions, including planning,
judgment, working memory, attention, decision-making, and regulation of
behavior. Dysfunction can produce substantial changes in personality and
behavior.
Question
A patient develops impaired comprehension of spoken language following a
cerebral infarction. Which region is most likely affected?
A) Broca area
B) Wernicke area
C) Primary motor cortex
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, D) Cerebellum
✓✓ Correct Answer: B) Wernicke area
Rationale:
Wernicke area, located in the dominant posterior temporal region, is important
for language comprehension. Injury can produce fluent but poorly meaningful
speech accompanied by impaired understanding of language.
Question
Which structure is most directly involved in regulation of autonomic functions
such as temperature, hunger, thirst, and endocrine control?
A) Hypothalamus
B) Cerebellum
C) Basal ganglia
D) Occipital cortex
✓✓ Correct Answer: A) Hypothalamus
Rationale:
The hypothalamus integrates neural and endocrine information and regulates
homeostasis, autonomic activity, temperature, appetite, thirst, circadian
rhythms, and pituitary function. It serves as a major connection between the
nervous and endocrine systems.
Question
Which structure is primarily responsible for maintaining wakefulness and arousal
through its connections with the cerebral cortex?
A) Reticular formation
B) Hippocampus
C) Basal ganglia
D) Corpus callosum
✓✓ Correct Answer: A) Reticular formation
Page 4 of 84
NU 545 : Nervous System & Neuro
Pathophysiology | LATEST UPDATE
2026/2027 (VERIFIED ANSWERS) |ALREADY
GRADED A+/ COLLEGE OF NURSING
Question
A patient sustains a peripheral nerve crush injury. Which feature most strongly
explains why functional recovery may occur?
A) Mature CNS neurons rapidly undergo mitosis
B) Schwann cells provide a pathway that can support axonal regrowth
C) Oligodendrocytes regenerate the entire injured axon
D) Astrocytes eliminate the damaged nerve and replace it
✓✓ Correct Answer: B) Schwann cells provide a pathway that can support
axonal regrowth
Rationale:
Peripheral nerves have greater regenerative potential than CNS nerves. After
injury, Schwann cells participate in removal of damaged tissue and can form a
supportive pathway that guides regenerating axonal sprouts. Regeneration is slow
and depends on factors such as the degree and location of injury, preservation of
connective-tissue structures, and the inflammatory and scarring response.
Question
A patient has damage to a sensory pathway carrying information from the skin
toward the spinal cord. Which term describes this direction of neural
transmission?
A) Efferent
Page 1 of 84
,B) Afferent
C) Somatic motor
D) Postganglionic
✓✓ Correct Answer: B) Afferent
Rationale:
Afferent pathways carry sensory information toward the CNS. Efferent pathways
carry motor or autonomic output away from the CNS toward an effector. A useful
distinction is “afferent arrives” and “efferent exits.”
Question
Which structure is primarily responsible for coordinating balance, posture, and
smooth voluntary movement?
A) Cerebellum
B) Hypothalamus
C) Hippocampus
D) Medulla
✓✓ Correct Answer: A) Cerebellum
Rationale:
The cerebellum integrates sensory information with motor commands to
coordinate movement, balance, posture, and motor learning. Cerebellar
dysfunction can produce ataxia, impaired coordination, dysmetria, and gait
abnormalities.
Question
A patient understands spoken language but has difficulty producing meaningful
speech after a left cerebral infarction. Which region is most likely damaged?
A) Wernicke area
B) Broca area
C) Occipital cortex
Page 2 of 84
,D) Primary auditory cortex
✓✓ Correct Answer: B) Broca area
Rationale:
Broca area, located in the dominant inferior frontal region, is involved in motor
aspects of speech production. Damage can cause expressive aphasia, in which the
patient has difficulty producing fluent meaningful language despite relatively
preserved comprehension. Wernicke area is more directly involved in language
comprehension.
Question
Which cerebral region is most closely associated with planning, judgment,
concentration, goal-directed behavior, and inhibition of inappropriate emotional
responses?
A) Prefrontal cortex
B) Occipital cortex
C) Primary motor cortex
D) Cerebellar cortex
✓✓ Correct Answer: A) Prefrontal cortex
Rationale:
The prefrontal cortex participates in executive functions, including planning,
judgment, working memory, attention, decision-making, and regulation of
behavior. Dysfunction can produce substantial changes in personality and
behavior.
Question
A patient develops impaired comprehension of spoken language following a
cerebral infarction. Which region is most likely affected?
A) Broca area
B) Wernicke area
C) Primary motor cortex
Page 3 of 84
, D) Cerebellum
✓✓ Correct Answer: B) Wernicke area
Rationale:
Wernicke area, located in the dominant posterior temporal region, is important
for language comprehension. Injury can produce fluent but poorly meaningful
speech accompanied by impaired understanding of language.
Question
Which structure is most directly involved in regulation of autonomic functions
such as temperature, hunger, thirst, and endocrine control?
A) Hypothalamus
B) Cerebellum
C) Basal ganglia
D) Occipital cortex
✓✓ Correct Answer: A) Hypothalamus
Rationale:
The hypothalamus integrates neural and endocrine information and regulates
homeostasis, autonomic activity, temperature, appetite, thirst, circadian
rhythms, and pituitary function. It serves as a major connection between the
nervous and endocrine systems.
Question
Which structure is primarily responsible for maintaining wakefulness and arousal
through its connections with the cerebral cortex?
A) Reticular formation
B) Hippocampus
C) Basal ganglia
D) Corpus callosum
✓✓ Correct Answer: A) Reticular formation
Page 4 of 84
