NURS 711 ADVANCED
PATHOPHYSIOLOGY EXAM 3 STUDY
GUIDE QUESTIONS & VERIFIED
ANSWERS | UNIVERSITY OF SOUTH
CAROLINA | GUARANTEE PASS
1. A patient with Multiple Sclerosis (MS) experiences an exacerbation of symptoms. What is
the underlying primary pathophysiological mechanism?
A. Degeneration of the lower motor neurons in the spinal cord
B. Depletion of dopamine in the substantia nigra pars compacta
C. Decreased acetylcholine receptor sites at the neuromuscular junction
D. Autoimmune-mediated demyelination of the central nervous system
Answer: D
Conceptual Explanation: MS is characterized by an immune-mediated process in which T
and B cells cross the blood-brain barrier, leading to inflammation and destruction of CNS
myelin and oligodendrocytes.
2. Which clinical finding is most characteristic of Amyotrophic Lateral Sclerosis (ALS)?
A. Symmetrical ascending paralysis with sensory loss
B. Cognitive decline combined with choreiform movements
,C. Relapsing-remitting visual disturbances and ataxia
D. Simultaneous upper and lower motor neuron degeneration
Answer: D
Conceptual Explanation: ALS is unique because it involves both upper motor neuron
(spasticity, hyperreflexia) and lower motor neuron (atrophy, fasciculations) degeneration
without involving sensory or cognitive pathways typically.
3. In the pathophysiology of Alzheimer’s disease, the accumulation of which substance is
associated with neurofibrillary tangles?
A. Tau proteins
B. Alpha-synuclein proteins
C. Amyloid-beta plaques
D. Glutamate excitotoxins
Answer: A
Conceptual Explanation: Neurofibrillary tangles are composed of abnormally
phosphorylated Tau proteins within neurons, while amyloid-beta forms extracellular
plaques.
4. A patient presents with a sudden onset of ‘the worst headache of my life.’ A CT scan
reveals blood in the basal cisterns. Which is the most likely diagnosis?
A. Subarachnoid hemorrhage
, B. Subdural hematoma
C. Epidural hematoma
D. Intracerebral hemorrhage
Answer: A
Conceptual Explanation: Subarachnoid hemorrhage, often due to a ruptured aneurysm,
classically presents with a ‘thunderclap’ headache and blood in the subarachnoid
space/cisterns.
5. What is the primary cause of the ‘penumbra’ effect following an ischemic stroke?
A. Irreversible necrosis of the core brain tissue
B. Cerebral edema causing midline shift
C. Ischemic tissue that is potentially salvageable with reperfusion
D. The rupture of small penetrating arteries
Answer: C
Conceptual Explanation: The penumbra is the area of ischemic but viable tissue
surrounding the necrotic core that can be saved if blood flow is restored quickly.
6. In Myasthenia Gravis, the defect in nerve impulse transmission is caused by:
A. Inhibition of acetylcholinesterase
B. Antibody-mediated destruction of acetylcholine receptors
PATHOPHYSIOLOGY EXAM 3 STUDY
GUIDE QUESTIONS & VERIFIED
ANSWERS | UNIVERSITY OF SOUTH
CAROLINA | GUARANTEE PASS
1. A patient with Multiple Sclerosis (MS) experiences an exacerbation of symptoms. What is
the underlying primary pathophysiological mechanism?
A. Degeneration of the lower motor neurons in the spinal cord
B. Depletion of dopamine in the substantia nigra pars compacta
C. Decreased acetylcholine receptor sites at the neuromuscular junction
D. Autoimmune-mediated demyelination of the central nervous system
Answer: D
Conceptual Explanation: MS is characterized by an immune-mediated process in which T
and B cells cross the blood-brain barrier, leading to inflammation and destruction of CNS
myelin and oligodendrocytes.
2. Which clinical finding is most characteristic of Amyotrophic Lateral Sclerosis (ALS)?
A. Symmetrical ascending paralysis with sensory loss
B. Cognitive decline combined with choreiform movements
,C. Relapsing-remitting visual disturbances and ataxia
D. Simultaneous upper and lower motor neuron degeneration
Answer: D
Conceptual Explanation: ALS is unique because it involves both upper motor neuron
(spasticity, hyperreflexia) and lower motor neuron (atrophy, fasciculations) degeneration
without involving sensory or cognitive pathways typically.
3. In the pathophysiology of Alzheimer’s disease, the accumulation of which substance is
associated with neurofibrillary tangles?
A. Tau proteins
B. Alpha-synuclein proteins
C. Amyloid-beta plaques
D. Glutamate excitotoxins
Answer: A
Conceptual Explanation: Neurofibrillary tangles are composed of abnormally
phosphorylated Tau proteins within neurons, while amyloid-beta forms extracellular
plaques.
4. A patient presents with a sudden onset of ‘the worst headache of my life.’ A CT scan
reveals blood in the basal cisterns. Which is the most likely diagnosis?
A. Subarachnoid hemorrhage
, B. Subdural hematoma
C. Epidural hematoma
D. Intracerebral hemorrhage
Answer: A
Conceptual Explanation: Subarachnoid hemorrhage, often due to a ruptured aneurysm,
classically presents with a ‘thunderclap’ headache and blood in the subarachnoid
space/cisterns.
5. What is the primary cause of the ‘penumbra’ effect following an ischemic stroke?
A. Irreversible necrosis of the core brain tissue
B. Cerebral edema causing midline shift
C. Ischemic tissue that is potentially salvageable with reperfusion
D. The rupture of small penetrating arteries
Answer: C
Conceptual Explanation: The penumbra is the area of ischemic but viable tissue
surrounding the necrotic core that can be saved if blood flow is restored quickly.
6. In Myasthenia Gravis, the defect in nerve impulse transmission is caused by:
A. Inhibition of acetylcholinesterase
B. Antibody-mediated destruction of acetylcholine receptors
