NUR 376: APPLIED PATHOPHYSIOLOGY
Comprehensive Examination (Exams 1 – 4)
200 Clinical & Pathophysiological Questions with Detailed Rationales
Exam 1: Cellular Adaptation, Fluid/Electrolytes, Genetics, and
Inflammation ===
Question 1 (Exam Section: Exam 1)
Clinical Case / Item 1: A patient presents with manifestations of cellular
injury. Which cellular change is considered a hallmark of irreversible
cell injury?
A. Cellular swelling and ribosomal detachment
B. Plasma membrane rupture and massive calcium influx into the
cytoplasm
C. Glycogen depletion and mild lipid deposition
D. Reversible mitochondrial condensation
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 1: Plasma membrane disruption and influx of
extracellular calcium activate destructive intracellular enzymes
(phospholipases, proteases), signifying irreversible cell death (necrosis).
Review of core concepts confirms this clinical finding.
Question 2 (Exam Section: Exam 1)
Clinical Case / Item 2: An individual experiences extracellular fluid
volume deficit due to severe gastroenteritis. Which clinical
manifestation is most characteristic?
A. Bounding peripheral pulses and jugular venous distention
, B. Orthostatic hypotension and decreased skin turgor
C. Peripheral pitting edema and pulmonary crackles
D. Hypertension and decreased hematocrit
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 2: Extracellular volume depletion leads to
intravascular hypovolemia, presenting with orthostatic hypotension,
tachycardia, dry mucous membranes, and decreased skin turgor. Review
of core concepts confirms this clinical finding.
Question 3 (Exam Section: Exam 1)
Clinical Case / Item 3: A patient's arterial blood gas shows pH 7.31,
PaCO2 52 mmHg, HCO3- 24 mEq/L. The nurse interprets this acid-base
imbalance as:
A. Metabolic acidosis, uncompensated
B. Respiratory acidosis, uncompensated
C. Respiratory alkalosis, partially compensated
D. Metabolic alkalosis, fully compensated
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 3: A low pH (< 7.35) combined with an elevated
PaCO2 (> 45 mmHg) and normal bicarbonate indicates uncompensated
respiratory acidosis due to alveolar hypoventilation. Review of core
concepts confirms this clinical finding.
Question 4 (Exam Section: Exam 1)
Clinical Case / Item 4: In X-linked recessive disorders, such as
hemophilia A, which statement accurately describes inheritance
patterns?
A. Affected fathers transmit the trait directly to all of their sons.
, B. Carrier mothers transmit the mutant gene to 50% of their sons,
who will express the disease.
C. Females cannot be affected under any clinical circumstance.
D. The disease skips two generations without exception.
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 4: X-linked recessive traits are carried by females
(heterozygous carriers) and expressed primarily in males who inherit
the single affected X chromosome. Review of core concepts confirms this
clinical finding.
Question 5 (Exam Section: Exam 1)
Clinical Case / Item 5: During the cellular phase of acute inflammation,
which adhesion molecules facilitate leukocyte rolling along the vascular
endothelial wall?
A. Integrins
B. Selectins
C. Cadherins
D. Immunoglobulins
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 5: Selectins (E-selectin and P-selectin) expressed
on endothelial cells bind carbohydrate ligands on leukocytes, mediating
the initial loose rolling adhesion along the vessel wall. Review of core
concepts confirms this clinical finding.
Question 6 (Exam Section: Exam 1)
Clinical Case / Item 6: A client is evaluated for chronic inflammation.
Which systemic laboratory marker is most commonly monitored to
gauge acute-phase reactant activity?
A. White blood cell differential count
, B. C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR)
C. Serum albumin and prealbumin
D. Serum electrolytes and blood urea nitrogen
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 6: C-reactive protein (CRP) produced by the liver
in response to IL-6 and ESR are standard systemic markers of acute and
chronic inflammation. Review of core concepts confirms this clinical
finding.
Question 7 (Exam Section: Exam 1)
Clinical Case / Item 7: Which neurotransmitter deficit is primarily
implicated in the pathophysiology and motor symptoms of Parkinson's
disease?
A. Acetylcholine in the cerebral cortex
B. Dopamine in the substantia nigra pars compacta
C. Serotonin in the raphe nuclei
D. Norepinephrine in the locus coeruleus
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 7: Parkinson's disease is characterized by the
degeneration of dopaminergic neurons in the substantia nigra pars
compacta, leading to striatal dopamine depletion and motor dysfunction.
Review of core concepts confirms this clinical finding.
Question 8 (Exam Section: Exam 1)
Clinical Case / Item 8: A patient experiences a sudden focal neurological
deficit lasting 45 minutes with complete resolution, diagnosed as a
transient ischemic attack (TIA). What is the primary pathophysiological
significance?
A. Permanent cerebral infarction has occurred in the penumbra.
Comprehensive Examination (Exams 1 – 4)
200 Clinical & Pathophysiological Questions with Detailed Rationales
Exam 1: Cellular Adaptation, Fluid/Electrolytes, Genetics, and
Inflammation ===
Question 1 (Exam Section: Exam 1)
Clinical Case / Item 1: A patient presents with manifestations of cellular
injury. Which cellular change is considered a hallmark of irreversible
cell injury?
A. Cellular swelling and ribosomal detachment
B. Plasma membrane rupture and massive calcium influx into the
cytoplasm
C. Glycogen depletion and mild lipid deposition
D. Reversible mitochondrial condensation
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 1: Plasma membrane disruption and influx of
extracellular calcium activate destructive intracellular enzymes
(phospholipases, proteases), signifying irreversible cell death (necrosis).
Review of core concepts confirms this clinical finding.
Question 2 (Exam Section: Exam 1)
Clinical Case / Item 2: An individual experiences extracellular fluid
volume deficit due to severe gastroenteritis. Which clinical
manifestation is most characteristic?
A. Bounding peripheral pulses and jugular venous distention
, B. Orthostatic hypotension and decreased skin turgor
C. Peripheral pitting edema and pulmonary crackles
D. Hypertension and decreased hematocrit
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 2: Extracellular volume depletion leads to
intravascular hypovolemia, presenting with orthostatic hypotension,
tachycardia, dry mucous membranes, and decreased skin turgor. Review
of core concepts confirms this clinical finding.
Question 3 (Exam Section: Exam 1)
Clinical Case / Item 3: A patient's arterial blood gas shows pH 7.31,
PaCO2 52 mmHg, HCO3- 24 mEq/L. The nurse interprets this acid-base
imbalance as:
A. Metabolic acidosis, uncompensated
B. Respiratory acidosis, uncompensated
C. Respiratory alkalosis, partially compensated
D. Metabolic alkalosis, fully compensated
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 3: A low pH (< 7.35) combined with an elevated
PaCO2 (> 45 mmHg) and normal bicarbonate indicates uncompensated
respiratory acidosis due to alveolar hypoventilation. Review of core
concepts confirms this clinical finding.
Question 4 (Exam Section: Exam 1)
Clinical Case / Item 4: In X-linked recessive disorders, such as
hemophilia A, which statement accurately describes inheritance
patterns?
A. Affected fathers transmit the trait directly to all of their sons.
, B. Carrier mothers transmit the mutant gene to 50% of their sons,
who will express the disease.
C. Females cannot be affected under any clinical circumstance.
D. The disease skips two generations without exception.
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 4: X-linked recessive traits are carried by females
(heterozygous carriers) and expressed primarily in males who inherit
the single affected X chromosome. Review of core concepts confirms this
clinical finding.
Question 5 (Exam Section: Exam 1)
Clinical Case / Item 5: During the cellular phase of acute inflammation,
which adhesion molecules facilitate leukocyte rolling along the vascular
endothelial wall?
A. Integrins
B. Selectins
C. Cadherins
D. Immunoglobulins
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 5: Selectins (E-selectin and P-selectin) expressed
on endothelial cells bind carbohydrate ligands on leukocytes, mediating
the initial loose rolling adhesion along the vessel wall. Review of core
concepts confirms this clinical finding.
Question 6 (Exam Section: Exam 1)
Clinical Case / Item 6: A client is evaluated for chronic inflammation.
Which systemic laboratory marker is most commonly monitored to
gauge acute-phase reactant activity?
A. White blood cell differential count
, B. C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR)
C. Serum albumin and prealbumin
D. Serum electrolytes and blood urea nitrogen
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 6: C-reactive protein (CRP) produced by the liver
in response to IL-6 and ESR are standard systemic markers of acute and
chronic inflammation. Review of core concepts confirms this clinical
finding.
Question 7 (Exam Section: Exam 1)
Clinical Case / Item 7: Which neurotransmitter deficit is primarily
implicated in the pathophysiology and motor symptoms of Parkinson's
disease?
A. Acetylcholine in the cerebral cortex
B. Dopamine in the substantia nigra pars compacta
C. Serotonin in the raphe nuclei
D. Norepinephrine in the locus coeruleus
Correct Answer & Rationale: Correct Answer: B. Pathophysiological
rationale for Question 7: Parkinson's disease is characterized by the
degeneration of dopaminergic neurons in the substantia nigra pars
compacta, leading to striatal dopamine depletion and motor dysfunction.
Review of core concepts confirms this clinical finding.
Question 8 (Exam Section: Exam 1)
Clinical Case / Item 8: A patient experiences a sudden focal neurological
deficit lasting 45 minutes with complete resolution, diagnosed as a
transient ischemic attack (TIA). What is the primary pathophysiological
significance?
A. Permanent cerebral infarction has occurred in the penumbra.
