NURS 6501N Exam 4 V1 | NURS 6501N
Advanced Pathophysiology | Actual Q&A
with Rationale (NURS6501N Exam 4) |
Walden University
1. A patient presents with tremors, bradykinesia, and muscle rigidity. The provider
understands that the primary pathophysiological process involves the degeneration of which
specific neural structure?
A. The cerebral cortex
B. The myelin sheath in the central nervous system
C. The anterior horn cells of the spinal cord
D. The dopaminergic neurons in the substantia nigra
Answer: D
Rationale: Parkinson’s disease is characterized by the progressive loss of dopamine-
producing neurons in the basal ganglia. This depletion leads to an imbalance between
excitatory and inhibitory neurotransmitters, specifically dopamine and acetylcholine. The
result is the classic presentation of resting tremors and difficulty initiating movement.
2. Which of the following describes the underlying mechanism of Multiple Sclerosis (MS)?
A. Demyelination of the central nervous system axons via an autoimmune response
B. Degeneration of lower motor neurons
,C. Acetylcholine receptor destruction at the neuromuscular junction
D. Ischemic necrosis of the thalamus
Answer: A
Rationale: Multiple Sclerosis is a chronic inflammatory disease where the immune system
attacks the myelin sheath surrounding nerve fibers in the brain and spinal cord. This
demyelination slows down or blocks nerve impulses, leading to varied neurological deficits.
Over time, the repeated inflammatory episodes can lead to permanent axonal scarring and
plaque formation.
3. An elderly patient experiences a brief episode of neurological deficit that resolves within
one hour. Which term best describes this occurrence?
A. Ischemic stroke
B. Hemorrhagic stroke
C. Lacunar infarct
D. Transient Ischemic Attack (TIA)
Answer: D
Rationale: A Transient Ischemic Attack (TIA) is a temporary blockage of blood flow to the
brain that does not result in permanent tissue necrosis. By definition, symptoms typically
resolve within 24 hours, though most last less than one hour. It serves as a significant
warning sign for a potential major stroke in the future.
, 4. A patient diagnosed with Myasthenia Gravis experiences progressive muscle weakness.
This condition is primarily caused by:
A. Autoimmune-mediated destruction of acetylcholine receptors at the postsynaptic
membrane
B. Excessive release of dopamine at the synaptic cleft
C. A viral infection of the brainstem
D. Genetic mutation of the dystrophin protein
Answer: A
Rationale: Myasthenia Gravis is an autoimmune disorder where antibodies block or
destroy nicotinic acetylcholine receptors at the neuromuscular junction. This reduction in
receptors results in impaired signal transmission and muscle fatigue, particularly after
repetitive use. Symptoms often include ptosis and diplopia due to involvement of the
extraocular muscles.
5. A 25-year-old male is brought to the emergency department after a diving accident. He has
lost all motor and sensory function below the level of the injury, along with a loss of spinal
reflexes. What is the initial phase of this injury called?
A. Autonomic dysreflexia
B. Neurogenic shock
C. Spinal shock
D. Brown-Séquard syndrome
Advanced Pathophysiology | Actual Q&A
with Rationale (NURS6501N Exam 4) |
Walden University
1. A patient presents with tremors, bradykinesia, and muscle rigidity. The provider
understands that the primary pathophysiological process involves the degeneration of which
specific neural structure?
A. The cerebral cortex
B. The myelin sheath in the central nervous system
C. The anterior horn cells of the spinal cord
D. The dopaminergic neurons in the substantia nigra
Answer: D
Rationale: Parkinson’s disease is characterized by the progressive loss of dopamine-
producing neurons in the basal ganglia. This depletion leads to an imbalance between
excitatory and inhibitory neurotransmitters, specifically dopamine and acetylcholine. The
result is the classic presentation of resting tremors and difficulty initiating movement.
2. Which of the following describes the underlying mechanism of Multiple Sclerosis (MS)?
A. Demyelination of the central nervous system axons via an autoimmune response
B. Degeneration of lower motor neurons
,C. Acetylcholine receptor destruction at the neuromuscular junction
D. Ischemic necrosis of the thalamus
Answer: A
Rationale: Multiple Sclerosis is a chronic inflammatory disease where the immune system
attacks the myelin sheath surrounding nerve fibers in the brain and spinal cord. This
demyelination slows down or blocks nerve impulses, leading to varied neurological deficits.
Over time, the repeated inflammatory episodes can lead to permanent axonal scarring and
plaque formation.
3. An elderly patient experiences a brief episode of neurological deficit that resolves within
one hour. Which term best describes this occurrence?
A. Ischemic stroke
B. Hemorrhagic stroke
C. Lacunar infarct
D. Transient Ischemic Attack (TIA)
Answer: D
Rationale: A Transient Ischemic Attack (TIA) is a temporary blockage of blood flow to the
brain that does not result in permanent tissue necrosis. By definition, symptoms typically
resolve within 24 hours, though most last less than one hour. It serves as a significant
warning sign for a potential major stroke in the future.
, 4. A patient diagnosed with Myasthenia Gravis experiences progressive muscle weakness.
This condition is primarily caused by:
A. Autoimmune-mediated destruction of acetylcholine receptors at the postsynaptic
membrane
B. Excessive release of dopamine at the synaptic cleft
C. A viral infection of the brainstem
D. Genetic mutation of the dystrophin protein
Answer: A
Rationale: Myasthenia Gravis is an autoimmune disorder where antibodies block or
destroy nicotinic acetylcholine receptors at the neuromuscular junction. This reduction in
receptors results in impaired signal transmission and muscle fatigue, particularly after
repetitive use. Symptoms often include ptosis and diplopia due to involvement of the
extraocular muscles.
5. A 25-year-old male is brought to the emergency department after a diving accident. He has
lost all motor and sensory function below the level of the injury, along with a loss of spinal
reflexes. What is the initial phase of this injury called?
A. Autonomic dysreflexia
B. Neurogenic shock
C. Spinal shock
D. Brown-Séquard syndrome
