NURS 6501 Advanced Pathophysiology Week 11 Exam
2026/2027 – Questions & Answers with Rationales
Table of Contents
1. Neurologic Pathophysiology
2. Cerebrovascular Disorders
3. Neurodegenerative Disorders
4. Neuromuscular Disorders
5. Endocrine & Metabolic Neurologic Disorders
6. Gastrointestinal & Hepatic Pathophysiology
7. Pancreatic & Biliary Disorders
8. Multisystem, Shock & Critical Illness
9. Advanced Clinical Integration
SECTION 1 — NEUROLOGIC PATHOPHYSIOLOGY
Question 1
Which mechanism is most directly responsible for neuronal injury during cerebral
ischemia?
A. Excessive glutamate-mediated excitotoxicity
B. Increased cerebral oxygen delivery
C. Increased ATP production
D. Reduced intracellular calcium
Answer: A. Excessive glutamate-mediated excitotoxicity
Rationale: Cerebral ischemia causes ATP depletion and failure of ion pumps.
Excess extracellular glutamate activates excitatory receptors, causing calcium
influx, oxidative stress, mitochondrial injury, and neuronal death.
,Question 2
The blood-brain barrier normally functions primarily to:
A. Prevent all substances from entering the brain
B. Regulate movement of substances between blood and neural tissue
C. Produce cerebrospinal fluid exclusively
D. Prevent cerebral blood flow
Answer: B. Regulate movement of substances between blood and neural tissue
Rationale: The blood-brain barrier selectively regulates transport between
circulating blood and the central nervous system, protecting neural tissue from
potentially harmful substances.
Question 3
Which cells are major components of the blood-brain barrier?
A. Endothelial cells with tight junctions
B. Erythrocytes
C. Osteocytes
D. Platelets
Answer: A. Endothelial cells with tight junctions
Rationale: Specialized cerebral endothelial cells connected by tight junctions form
the structural foundation of the blood-brain barrier, with support from astrocytes
and pericytes.
Question 4
Which neurotransmitter is the major excitatory neurotransmitter in the central
nervous system?
A. GABA
B. Glutamate
C. Dopamine
D. Glycine
,Answer: B. Glutamate
Rationale: Glutamate is the principal excitatory neurotransmitter in the CNS.
Excessive glutamate activity can contribute to neuronal injury during ischemia and
other neurologic disorders.
Question 5
GABA primarily functions as:
A. An inhibitory neurotransmitter
B. An excitatory hormone
C. A clotting factor
D. A thyroid hormone
Answer: A. An inhibitory neurotransmitter
Rationale: Gamma-aminobutyric acid (GABA) is the principal inhibitory
neurotransmitter in the CNS and reduces neuronal excitability.
Question 6
Which mechanism contributes to cerebral edema following acute brain injury?
A. Increased blood-brain barrier permeability
B. Increased cerebrospinal fluid absorption
C. Decreased cerebral blood volume only
D. Increased plasma oncotic pressure
Answer: A. Increased blood-brain barrier permeability
Rationale: Vasogenic cerebral edema results from disruption of the blood-brain
barrier, allowing fluid and proteins to move into the extracellular space.
Question 7
Cytotoxic cerebral edema is primarily caused by:
, A. Cellular swelling from impaired ion regulation
B. Increased CSF absorption
C. Decreased intracellular sodium
D. Increased plasma albumin
Answer: A. Cellular swelling from impaired ion regulation
Rationale: Energy failure disrupts sodium-potassium pump function, causing
intracellular sodium and water accumulation and swelling of neurons and glial
cells.
Question 8
Which equation best describes cerebral perfusion pressure?
A. CPP = ICP − MAP
B. CPP = MAP − ICP
C. CPP = MAP + ICP
D. CPP = HR − ICP
Answer: B. CPP = MAP − ICP
Rationale: Cerebral perfusion pressure is approximately mean arterial pressure
minus intracranial pressure. Increased ICP can therefore reduce cerebral
perfusion.
Question 9
A patient develops increased intracranial pressure. Which change is most
concerning?
A. Decreased cerebral perfusion pressure
B. Increased cerebral oxygenation
C. Increased renal filtration
D. Increased peripheral circulation
Answer: A. Decreased cerebral perfusion pressure
2026/2027 – Questions & Answers with Rationales
Table of Contents
1. Neurologic Pathophysiology
2. Cerebrovascular Disorders
3. Neurodegenerative Disorders
4. Neuromuscular Disorders
5. Endocrine & Metabolic Neurologic Disorders
6. Gastrointestinal & Hepatic Pathophysiology
7. Pancreatic & Biliary Disorders
8. Multisystem, Shock & Critical Illness
9. Advanced Clinical Integration
SECTION 1 — NEUROLOGIC PATHOPHYSIOLOGY
Question 1
Which mechanism is most directly responsible for neuronal injury during cerebral
ischemia?
A. Excessive glutamate-mediated excitotoxicity
B. Increased cerebral oxygen delivery
C. Increased ATP production
D. Reduced intracellular calcium
Answer: A. Excessive glutamate-mediated excitotoxicity
Rationale: Cerebral ischemia causes ATP depletion and failure of ion pumps.
Excess extracellular glutamate activates excitatory receptors, causing calcium
influx, oxidative stress, mitochondrial injury, and neuronal death.
,Question 2
The blood-brain barrier normally functions primarily to:
A. Prevent all substances from entering the brain
B. Regulate movement of substances between blood and neural tissue
C. Produce cerebrospinal fluid exclusively
D. Prevent cerebral blood flow
Answer: B. Regulate movement of substances between blood and neural tissue
Rationale: The blood-brain barrier selectively regulates transport between
circulating blood and the central nervous system, protecting neural tissue from
potentially harmful substances.
Question 3
Which cells are major components of the blood-brain barrier?
A. Endothelial cells with tight junctions
B. Erythrocytes
C. Osteocytes
D. Platelets
Answer: A. Endothelial cells with tight junctions
Rationale: Specialized cerebral endothelial cells connected by tight junctions form
the structural foundation of the blood-brain barrier, with support from astrocytes
and pericytes.
Question 4
Which neurotransmitter is the major excitatory neurotransmitter in the central
nervous system?
A. GABA
B. Glutamate
C. Dopamine
D. Glycine
,Answer: B. Glutamate
Rationale: Glutamate is the principal excitatory neurotransmitter in the CNS.
Excessive glutamate activity can contribute to neuronal injury during ischemia and
other neurologic disorders.
Question 5
GABA primarily functions as:
A. An inhibitory neurotransmitter
B. An excitatory hormone
C. A clotting factor
D. A thyroid hormone
Answer: A. An inhibitory neurotransmitter
Rationale: Gamma-aminobutyric acid (GABA) is the principal inhibitory
neurotransmitter in the CNS and reduces neuronal excitability.
Question 6
Which mechanism contributes to cerebral edema following acute brain injury?
A. Increased blood-brain barrier permeability
B. Increased cerebrospinal fluid absorption
C. Decreased cerebral blood volume only
D. Increased plasma oncotic pressure
Answer: A. Increased blood-brain barrier permeability
Rationale: Vasogenic cerebral edema results from disruption of the blood-brain
barrier, allowing fluid and proteins to move into the extracellular space.
Question 7
Cytotoxic cerebral edema is primarily caused by:
, A. Cellular swelling from impaired ion regulation
B. Increased CSF absorption
C. Decreased intracellular sodium
D. Increased plasma albumin
Answer: A. Cellular swelling from impaired ion regulation
Rationale: Energy failure disrupts sodium-potassium pump function, causing
intracellular sodium and water accumulation and swelling of neurons and glial
cells.
Question 8
Which equation best describes cerebral perfusion pressure?
A. CPP = ICP − MAP
B. CPP = MAP − ICP
C. CPP = MAP + ICP
D. CPP = HR − ICP
Answer: B. CPP = MAP − ICP
Rationale: Cerebral perfusion pressure is approximately mean arterial pressure
minus intracranial pressure. Increased ICP can therefore reduce cerebral
perfusion.
Question 9
A patient develops increased intracranial pressure. Which change is most
concerning?
A. Decreased cerebral perfusion pressure
B. Increased cerebral oxygenation
C. Increased renal filtration
D. Increased peripheral circulation
Answer: A. Decreased cerebral perfusion pressure
