NURS 6501 ADVANCED PATHOPHYSIOLOGY MIDTERM 2026
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Section 1: Cellular Function & Adaptation (Questions 1-20)
Q1: A patient with severe peripheral vascular disease presents with gangrenous toes.
The nurse notes the tissue is dry, shriveled, and dark black. Which specific type of
cellular necrosis is most likely occurring?
A. Liquefactive necrosis
B. Coagulative necrosis [CORRECT]
C. Caseous necrosis
D. Fat necrosis
Correct Answer: B
Rationale: Coagulative necrosis is caused by ischemia leading to protein denaturation,
typically occurring in solid organs and limbs (gangrene), resulting in firm, dry tissue;
liquefactive necrosis involves enzymatic liquefaction seen in brain abscesses, caseous
is seen in tuberculosis, and fat necrosis occurs in pancreatic injury.
Q2: A patient diagnosed with a genetic mutation causing excessive intracellular calcium
accumulation is experiencing irreversible cellular injury. At the cellular level, which
pathophysiologic mechanism is the primary cause of cell death in this scenario?
A. Depletion of ATP stores
B. Activation of phospholipases and proteases [CORRECT]
C. Influx of sodium and water
D. Shift to anaerobic metabolism
Correct Answer: B
Rationale: Elevated intracellular calcium directly activates destructive enzymes such as
phospholipases (damaging cell membranes), proteases (damaging cytoskeleton), and
endonucleases (damaging DNA), driving irreversible injury; ATP depletion is the initial
trigger, but calcium enzyme activation is the direct executioner of cell death.
Q3: A patient with a long history of chronic alcohol abuse presents with a enlarged liver.
Biopsy reveals an increase in the size of individual hepatocytes due to increased
cellular organelles, but no new cells have formed. Which cellular adaptation is this?
A. Hyperplasia
B. Dysplasia
C. Hypertrophy [CORRECT]
D. Metaplasia
Correct Answer: C
,Rationale: Hypertrophy is an increase in cell size due to increased synthesis of cellular
proteins and organelles, commonly seen in hepatocytes exposed to alcohol metabolites;
hyperplasia involves an increase in cell number, dysplasia is abnormal cell growth, and
metaplasia is a change in cell type.
Q4: A 65-year-old smoker with a chronic cough undergoes bronchoscopy, which reveals
that the normal ciliated columnar epithelium of the trachea has been replaced by
stratified squamous epithelium. This cellular adaptation is known as:
A. Metaplasia [CORRECT]
B. Anaplasia
C. Hyperplasia
D. Atrophy
Correct Answer: A
Rationale: Metaplasia is the reversible replacement of one differentiated adult cell type
with another, often as an adaptive response to chronic stress like smoking, changing
respiratory epithelium to stratified squamous to better withstand irritation; anaplasia
refers to undifferentiated tumor cells.
Q5: A cell deprived of oxygen shifts its metabolic pathways. Which of the following
describes the immediate cellular consequence of this hypoxic state?
A. Increased ATP production via oxidative phosphorylation
B. Failure of the sodium-potassium pump leading to cellular swelling [CORRECT]
C. Increased protein synthesis to repair damage
D. Activation of apoptosis via the intrinsic pathway
Correct Answer: B
Rationale: Hypoxia rapidly depletes ATP, which is required to fuel the Na+/K+-ATPase
pump; failure of this pump allows sodium to accumulate intracellularly, drawing water in
and causing cellular (oncotic) swelling, the earliest sign of reversible injury.
Q6: A patient is prescribed a chemotherapy drug that intentionally damages cellular
DNA to induce cell death. Which cellular process is being artificially stimulated by this
medication?
A. Necrosis
B. Apoptosis [CORRECT]
C. Pyroptosis
D. Ferroptosis
Correct Answer: B
Rationale: Apoptosis is a highly regulated, energy-dependent programmed cell death
often triggered by intrinsic mitochondrial pathways in response to severe DNA damage;
necrosis is unregulated accidental death, while pyroptosis and ferroptosis are
inflammatory and iron-dependent death pathways, respectively.
,Q7: A laboratory technician is analyzing a tissue sample from a patient with a severe
bacterial infection and notes widespread cellular death characterized by enzymatic
liquefaction of the tissue. Which cells are most likely responsible for this liquefactive
necrosis?
A. Neutrophils [CORRECT]
B. Macrophages
C. Eosinophils
D. Basophils
Correct Answer: A
Rationale: Liquefactive necrosis is characterized by the transformation of solid tissue
into a liquid viscous mass, typically caused by the release of hydrolytic enzymes from
acute inflammatory cells, particularly neutrophils, which digest the tissue in abscesses.
Q8: A patient presents with severe hyponatremia. At the cellular level, what is the
primary mechanism causing the resulting cerebral edema?
A. Increased intracellular osmolarity drawing water into the cells [CORRECT]
B. Decreased extracellular osmolarity pushing water out of cells
C. Activation of the renin-angiotensin-aldosterone system
D. Shift of potassium ions out of the cells
Correct Answer: A
Rationale: Hyponatremia creates a state of decreased extracellular fluid osmolarity;
because water moves freely across cell membranes down its osmotic gradient, water
moves into the cells, increasing intracellular volume and causing cerebral edema.
Q9: A patient with hypercalcemia presents with muscle weakness, fatigue, and cardiac
dysrhythmias. At the cellular level, hypercalcemia primarily affects which physiological
process?
A. Decreases resting membrane potential threshold
B. Decreases excitation-contraction coupling in muscle and cardiac cells [CORRECT]
C. Increases sodium channel permeability
D. Stimulates release of parathyroid hormone
Correct Answer: B
Rationale: Calcium stabilizes resting membrane potential and competes with sodium for
entry into cells during depolarization; excessive extracellular calcium raises the
threshold for excitation, making it harder for muscle and cardiac cells to depolarize,
leading to weakness and arrhythmias.
Q10: A 45-year-old patient has a serum potassium level of 6.8 mEq/L. Which cellular
mechanism best explains the impending myocardial instability?
A. Increased intracellular potassium concentration
B. Altered resting membrane potential causing delayed repolarization [CORRECT]
, C. Enhanced sodium-potassium pump activity
D. Increased permeability of calcium channels
Correct Answer: B
Rationale: Hyperkalemia increases the concentration gradient of potassium across the
cell membrane, which partially depolarizes the resting membrane potential, leading to
slowed conduction, prolonged repolarization, and peaked T waves or ventricular
fibrillation.
Q11: A patient with severe dehydration secondary to vomiting has a blood pH of 7.28, a
PaCO2 of 35 mmHg, and a bicarbonate level of 16 mEq/L. What is the primary
compensatory mechanism expected in this patient?
A. Hypoventilation to retain carbon dioxide [CORRECT]
B. Hyperventilation to blow off carbon dioxide
C. Renal excretion of bicarbonate
D. Renal retention of hydrogen ions
Correct Answer: A
Rationale: The patient has metabolic acidosis (low pH, low HCO3-); the primary
respiratory compensation is hypoventilation to increase PaCO2, which dissociates into
carbonic acid to buffer the low pH, though this compensation is limited by the need to
maintain oxygenation.
Q12: A patient with chronic obstructive pulmonary disease (COPD) has a blood pH of
7.34, a PaCO2 of 55 mmHg, and a bicarbonate of 32 mEq/L. Which pathophysiologic
process do these values indicate?
A. Acute respiratory acidosis
B. Partially compensated respiratory acidosis [CORRECT]
C. Partially compensated metabolic alkalosis
D. Fully compensated metabolic acidosis
Correct Answer: B
Rationale: The elevated PaCO2 indicates respiratory acidosis, and the elevated HCO3-
indicates renal compensation (retention of bicarbonate) to buffer the acid; the pH is still
below normal, indicating partial rather than full compensation.
Q13: A patient experiences a massive crush injury to the lower extremities. Which
electrolyte shift is most critical to monitor due to the cellular destruction?
A. Rapid release of intracellular potassium into the extracellular fluid [CORRECT]
B. Shift of extracellular calcium into the cells
C. Movement of sodium out of the cells
D. Shift of magnesium into the extracellular space
Correct Answer: A
| Latest Questions and Answers 2026/2027 | Verified Edition |
Pass Guaranteed - A+ Graded
Section 1: Cellular Function & Adaptation (Questions 1-20)
Q1: A patient with severe peripheral vascular disease presents with gangrenous toes.
The nurse notes the tissue is dry, shriveled, and dark black. Which specific type of
cellular necrosis is most likely occurring?
A. Liquefactive necrosis
B. Coagulative necrosis [CORRECT]
C. Caseous necrosis
D. Fat necrosis
Correct Answer: B
Rationale: Coagulative necrosis is caused by ischemia leading to protein denaturation,
typically occurring in solid organs and limbs (gangrene), resulting in firm, dry tissue;
liquefactive necrosis involves enzymatic liquefaction seen in brain abscesses, caseous
is seen in tuberculosis, and fat necrosis occurs in pancreatic injury.
Q2: A patient diagnosed with a genetic mutation causing excessive intracellular calcium
accumulation is experiencing irreversible cellular injury. At the cellular level, which
pathophysiologic mechanism is the primary cause of cell death in this scenario?
A. Depletion of ATP stores
B. Activation of phospholipases and proteases [CORRECT]
C. Influx of sodium and water
D. Shift to anaerobic metabolism
Correct Answer: B
Rationale: Elevated intracellular calcium directly activates destructive enzymes such as
phospholipases (damaging cell membranes), proteases (damaging cytoskeleton), and
endonucleases (damaging DNA), driving irreversible injury; ATP depletion is the initial
trigger, but calcium enzyme activation is the direct executioner of cell death.
Q3: A patient with a long history of chronic alcohol abuse presents with a enlarged liver.
Biopsy reveals an increase in the size of individual hepatocytes due to increased
cellular organelles, but no new cells have formed. Which cellular adaptation is this?
A. Hyperplasia
B. Dysplasia
C. Hypertrophy [CORRECT]
D. Metaplasia
Correct Answer: C
,Rationale: Hypertrophy is an increase in cell size due to increased synthesis of cellular
proteins and organelles, commonly seen in hepatocytes exposed to alcohol metabolites;
hyperplasia involves an increase in cell number, dysplasia is abnormal cell growth, and
metaplasia is a change in cell type.
Q4: A 65-year-old smoker with a chronic cough undergoes bronchoscopy, which reveals
that the normal ciliated columnar epithelium of the trachea has been replaced by
stratified squamous epithelium. This cellular adaptation is known as:
A. Metaplasia [CORRECT]
B. Anaplasia
C. Hyperplasia
D. Atrophy
Correct Answer: A
Rationale: Metaplasia is the reversible replacement of one differentiated adult cell type
with another, often as an adaptive response to chronic stress like smoking, changing
respiratory epithelium to stratified squamous to better withstand irritation; anaplasia
refers to undifferentiated tumor cells.
Q5: A cell deprived of oxygen shifts its metabolic pathways. Which of the following
describes the immediate cellular consequence of this hypoxic state?
A. Increased ATP production via oxidative phosphorylation
B. Failure of the sodium-potassium pump leading to cellular swelling [CORRECT]
C. Increased protein synthesis to repair damage
D. Activation of apoptosis via the intrinsic pathway
Correct Answer: B
Rationale: Hypoxia rapidly depletes ATP, which is required to fuel the Na+/K+-ATPase
pump; failure of this pump allows sodium to accumulate intracellularly, drawing water in
and causing cellular (oncotic) swelling, the earliest sign of reversible injury.
Q6: A patient is prescribed a chemotherapy drug that intentionally damages cellular
DNA to induce cell death. Which cellular process is being artificially stimulated by this
medication?
A. Necrosis
B. Apoptosis [CORRECT]
C. Pyroptosis
D. Ferroptosis
Correct Answer: B
Rationale: Apoptosis is a highly regulated, energy-dependent programmed cell death
often triggered by intrinsic mitochondrial pathways in response to severe DNA damage;
necrosis is unregulated accidental death, while pyroptosis and ferroptosis are
inflammatory and iron-dependent death pathways, respectively.
,Q7: A laboratory technician is analyzing a tissue sample from a patient with a severe
bacterial infection and notes widespread cellular death characterized by enzymatic
liquefaction of the tissue. Which cells are most likely responsible for this liquefactive
necrosis?
A. Neutrophils [CORRECT]
B. Macrophages
C. Eosinophils
D. Basophils
Correct Answer: A
Rationale: Liquefactive necrosis is characterized by the transformation of solid tissue
into a liquid viscous mass, typically caused by the release of hydrolytic enzymes from
acute inflammatory cells, particularly neutrophils, which digest the tissue in abscesses.
Q8: A patient presents with severe hyponatremia. At the cellular level, what is the
primary mechanism causing the resulting cerebral edema?
A. Increased intracellular osmolarity drawing water into the cells [CORRECT]
B. Decreased extracellular osmolarity pushing water out of cells
C. Activation of the renin-angiotensin-aldosterone system
D. Shift of potassium ions out of the cells
Correct Answer: A
Rationale: Hyponatremia creates a state of decreased extracellular fluid osmolarity;
because water moves freely across cell membranes down its osmotic gradient, water
moves into the cells, increasing intracellular volume and causing cerebral edema.
Q9: A patient with hypercalcemia presents with muscle weakness, fatigue, and cardiac
dysrhythmias. At the cellular level, hypercalcemia primarily affects which physiological
process?
A. Decreases resting membrane potential threshold
B. Decreases excitation-contraction coupling in muscle and cardiac cells [CORRECT]
C. Increases sodium channel permeability
D. Stimulates release of parathyroid hormone
Correct Answer: B
Rationale: Calcium stabilizes resting membrane potential and competes with sodium for
entry into cells during depolarization; excessive extracellular calcium raises the
threshold for excitation, making it harder for muscle and cardiac cells to depolarize,
leading to weakness and arrhythmias.
Q10: A 45-year-old patient has a serum potassium level of 6.8 mEq/L. Which cellular
mechanism best explains the impending myocardial instability?
A. Increased intracellular potassium concentration
B. Altered resting membrane potential causing delayed repolarization [CORRECT]
, C. Enhanced sodium-potassium pump activity
D. Increased permeability of calcium channels
Correct Answer: B
Rationale: Hyperkalemia increases the concentration gradient of potassium across the
cell membrane, which partially depolarizes the resting membrane potential, leading to
slowed conduction, prolonged repolarization, and peaked T waves or ventricular
fibrillation.
Q11: A patient with severe dehydration secondary to vomiting has a blood pH of 7.28, a
PaCO2 of 35 mmHg, and a bicarbonate level of 16 mEq/L. What is the primary
compensatory mechanism expected in this patient?
A. Hypoventilation to retain carbon dioxide [CORRECT]
B. Hyperventilation to blow off carbon dioxide
C. Renal excretion of bicarbonate
D. Renal retention of hydrogen ions
Correct Answer: A
Rationale: The patient has metabolic acidosis (low pH, low HCO3-); the primary
respiratory compensation is hypoventilation to increase PaCO2, which dissociates into
carbonic acid to buffer the low pH, though this compensation is limited by the need to
maintain oxygenation.
Q12: A patient with chronic obstructive pulmonary disease (COPD) has a blood pH of
7.34, a PaCO2 of 55 mmHg, and a bicarbonate of 32 mEq/L. Which pathophysiologic
process do these values indicate?
A. Acute respiratory acidosis
B. Partially compensated respiratory acidosis [CORRECT]
C. Partially compensated metabolic alkalosis
D. Fully compensated metabolic acidosis
Correct Answer: B
Rationale: The elevated PaCO2 indicates respiratory acidosis, and the elevated HCO3-
indicates renal compensation (retention of bicarbonate) to buffer the acid; the pH is still
below normal, indicating partial rather than full compensation.
Q13: A patient experiences a massive crush injury to the lower extremities. Which
electrolyte shift is most critical to monitor due to the cellular destruction?
A. Rapid release of intracellular potassium into the extracellular fluid [CORRECT]
B. Shift of extracellular calcium into the cells
C. Movement of sodium out of the cells
D. Shift of magnesium into the extracellular space
Correct Answer: A
