NSG 120 Pathophysiology HESI Exam 1 – Complete Exam-Style
Questions with Detailed Rationales | 100% Verified – Pass
Guaranteed – A+ Graded
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CANDIDATE INSTRUCTIONS:
• Select the best answer for each question.
• Apply pathophysiologic mechanisms to clinical scenarios.
• Consider cellular, systemic, and organ-level processes.
• Suggested time: 90–105 minutes (70 questions).
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SECTION A: CELLULAR ADAPTATION, INJURY & NEOPLASIA (14 Questions)
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A1. A 68-year-old male with a 20-year history of poorly controlled hypertension presents for a routine
check-up. An echocardiogram reveals left ventricular wall thickening with a normal chamber size.
The nurse understands that this cellular adaptation is best described as:
A. Atrophy due to chronic pressure overload
B. Hypertrophy in response to increased workload
C. Hyperplasia from sustained hemodynamic stress
D. Metaplasia secondary to ischemic cell injury
Correct Answer: B
Rationale: Hypertrophy is an increase in cell size (not number) resulting from increased functional
demand; in hypertension, the left ventricle must generate higher pressure, causing myocyte
enlargement and wall thickening. The primary distractor, atrophy (A), represents a decrease in cell
size and would not occur with sustained pressure overload.
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A2. A 45-year-old woman with a 30 pack-year smoking history has a Pap smear showing squamous
metaplasia in the cervical transformation zone. The nurse recognizes that metaplasia represents
which pathophysiologic process?
,A. Replacement of one differentiated cell type by another mature cell type
B. Disordered growth with loss of cellular maturation and polarity
C. An increase in the number of cells in a tissue or organ
D. A decrease in cell size due to reduced workload or stimulation
Correct Answer: A
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by another mature
cell type, often in response to chronic irritation (e.g., smoking causing squamous metaplasia in
respiratory epithelium or cervix). Dysplasia (B) involves disordered growth and is potentially
premalignant, not metaplasia.
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A3. A 72-year-old patient with severe atherosclerosis develops an acute myocardial infarction. The
nurse anticipates that the myocardial tissue will demonstrate which type of necrosis?
A. Liquefactive necrosis with enzymatic digestion
B. Coagulative necrosis preserving tissue architecture
C. Caseous necrosis with cheese-like appearance
D. Fat necrosis with chalky white deposits
Correct Answer: B
Rationale: Coagulative necrosis is characteristic of ischemic injury in most solid organs (except the
brain); denatured proteins preserve tissue architecture for several days, allowing the infarcted
myocardium to retain its structural outline. Liquefactive necrosis (A) occurs in the brain and with
suppurative infections.
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A4. A patient who suffered a stroke 48 hours ago is found to have soft, liquefied brain tissue at the
site of the cerebral infarct. The nurse understands that this type of necrosis occurs because:
A. Brain tissue lacks significant structural protein and relies on enzymatic digestion
B. The ischemic insult triggered massive calcium influx causing coagulation
C. Hypoxic injury induced caspase activation leading to apoptotic cell death
D. Bacterial infection produced suppurative inflammation with abscess formation
Correct Answer: A
Rationale: Liquefactive necrosis in the brain occurs because neural tissue has high lipid content, low
structural protein, and relies on enzymatic digestion by microglial and leukocyte hydrolases; this
results in softening and liquefaction rather than protein denaturation. Coagulative necrosis (B) does
not occur in the brain due to its unique tissue composition.
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A5. A patient with acute pancreatitis presents with severe abdominal pain and subcutaneous fat
necrosis. The nurse understands that fat necrosis in this condition results from:
A. Release of activated pancreatic lipases causing saponification of fat
B. Ischemic injury to adipose tissue from hypovolemic shock
C. Direct bacterial invasion of subcutaneous fat layers
D. Autoimmune destruction of adipocytes by cytotoxic T cells
Correct Answer: A
Rationale: In acute pancreatitis, prematurely activated pancreatic lipases (and phospholipases) are
released into surrounding tissue, hydrolyzing triglycerides into fatty acids that combine with calcium
to form chalky white soaps (saponification), visible on imaging. Ischemic injury (B) does not produce
the characteristic saponification seen in pancreatic fat necrosis.
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A6. A patient with a gangrenous right foot has dry, shrunken, blackened tissue with a clear line of
demarcation from viable tissue. The nurse identifies this as dry gangrene and understands the
underlying mechanism is:
A. Anaerobic bacterial infection with gas production in necrotic tissue
B. Coagulative necrosis with superimposed bacterial putrefaction and edema
C. Ischemic coagulative necrosis without significant bacterial infection
D. Liquefactive necrosis with enzymatic autodigestion of tissue
Correct Answer: C
Rationale: Dry gangrene results from chronic ischemia (typically arterial insufficiency) causing
coagulative necrosis; the tissue becomes dry, shrunken, and black due to desiccation and lack of
bacterial infection. Wet gangrene (B) involves superimposed bacterial infection with liquefaction and
edema.
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A7. A patient receiving thrombolytic therapy for an acute MI develops reperfusion injury. The nurse
understands that the primary mechanism of reperfusion injury involves:
A. Restoration of blood flow generating oxygen-derived free radicals and calcium overload
B. Persistent ischemia causing progressive ATP depletion and membrane failure
Questions with Detailed Rationales | 100% Verified – Pass
Guaranteed – A+ Graded
══════════════════════════════════════════════════════════════
═════════════════
CANDIDATE INSTRUCTIONS:
• Select the best answer for each question.
• Apply pathophysiologic mechanisms to clinical scenarios.
• Consider cellular, systemic, and organ-level processes.
• Suggested time: 90–105 minutes (70 questions).
══════════════════════════════════════════════════════════════
═════════════════
SECTION A: CELLULAR ADAPTATION, INJURY & NEOPLASIA (14 Questions)
──────────────────────────────────────────────────────────────
─────────────────
A1. A 68-year-old male with a 20-year history of poorly controlled hypertension presents for a routine
check-up. An echocardiogram reveals left ventricular wall thickening with a normal chamber size.
The nurse understands that this cellular adaptation is best described as:
A. Atrophy due to chronic pressure overload
B. Hypertrophy in response to increased workload
C. Hyperplasia from sustained hemodynamic stress
D. Metaplasia secondary to ischemic cell injury
Correct Answer: B
Rationale: Hypertrophy is an increase in cell size (not number) resulting from increased functional
demand; in hypertension, the left ventricle must generate higher pressure, causing myocyte
enlargement and wall thickening. The primary distractor, atrophy (A), represents a decrease in cell
size and would not occur with sustained pressure overload.
──────────────────────────────────────────────────────────────
─────────────────
A2. A 45-year-old woman with a 30 pack-year smoking history has a Pap smear showing squamous
metaplasia in the cervical transformation zone. The nurse recognizes that metaplasia represents
which pathophysiologic process?
,A. Replacement of one differentiated cell type by another mature cell type
B. Disordered growth with loss of cellular maturation and polarity
C. An increase in the number of cells in a tissue or organ
D. A decrease in cell size due to reduced workload or stimulation
Correct Answer: A
Rationale: Metaplasia is the reversible replacement of one differentiated cell type by another mature
cell type, often in response to chronic irritation (e.g., smoking causing squamous metaplasia in
respiratory epithelium or cervix). Dysplasia (B) involves disordered growth and is potentially
premalignant, not metaplasia.
──────────────────────────────────────────────────────────────
─────────────────
A3. A 72-year-old patient with severe atherosclerosis develops an acute myocardial infarction. The
nurse anticipates that the myocardial tissue will demonstrate which type of necrosis?
A. Liquefactive necrosis with enzymatic digestion
B. Coagulative necrosis preserving tissue architecture
C. Caseous necrosis with cheese-like appearance
D. Fat necrosis with chalky white deposits
Correct Answer: B
Rationale: Coagulative necrosis is characteristic of ischemic injury in most solid organs (except the
brain); denatured proteins preserve tissue architecture for several days, allowing the infarcted
myocardium to retain its structural outline. Liquefactive necrosis (A) occurs in the brain and with
suppurative infections.
──────────────────────────────────────────────────────────────
─────────────────
A4. A patient who suffered a stroke 48 hours ago is found to have soft, liquefied brain tissue at the
site of the cerebral infarct. The nurse understands that this type of necrosis occurs because:
A. Brain tissue lacks significant structural protein and relies on enzymatic digestion
B. The ischemic insult triggered massive calcium influx causing coagulation
C. Hypoxic injury induced caspase activation leading to apoptotic cell death
D. Bacterial infection produced suppurative inflammation with abscess formation
Correct Answer: A
Rationale: Liquefactive necrosis in the brain occurs because neural tissue has high lipid content, low
structural protein, and relies on enzymatic digestion by microglial and leukocyte hydrolases; this
results in softening and liquefaction rather than protein denaturation. Coagulative necrosis (B) does
not occur in the brain due to its unique tissue composition.
, ──────────────────────────────────────────────────────────────
─────────────────
A5. A patient with acute pancreatitis presents with severe abdominal pain and subcutaneous fat
necrosis. The nurse understands that fat necrosis in this condition results from:
A. Release of activated pancreatic lipases causing saponification of fat
B. Ischemic injury to adipose tissue from hypovolemic shock
C. Direct bacterial invasion of subcutaneous fat layers
D. Autoimmune destruction of adipocytes by cytotoxic T cells
Correct Answer: A
Rationale: In acute pancreatitis, prematurely activated pancreatic lipases (and phospholipases) are
released into surrounding tissue, hydrolyzing triglycerides into fatty acids that combine with calcium
to form chalky white soaps (saponification), visible on imaging. Ischemic injury (B) does not produce
the characteristic saponification seen in pancreatic fat necrosis.
──────────────────────────────────────────────────────────────
─────────────────
A6. A patient with a gangrenous right foot has dry, shrunken, blackened tissue with a clear line of
demarcation from viable tissue. The nurse identifies this as dry gangrene and understands the
underlying mechanism is:
A. Anaerobic bacterial infection with gas production in necrotic tissue
B. Coagulative necrosis with superimposed bacterial putrefaction and edema
C. Ischemic coagulative necrosis without significant bacterial infection
D. Liquefactive necrosis with enzymatic autodigestion of tissue
Correct Answer: C
Rationale: Dry gangrene results from chronic ischemia (typically arterial insufficiency) causing
coagulative necrosis; the tissue becomes dry, shrunken, and black due to desiccation and lack of
bacterial infection. Wet gangrene (B) involves superimposed bacterial infection with liquefaction and
edema.
──────────────────────────────────────────────────────────────
─────────────────
A7. A patient receiving thrombolytic therapy for an acute MI develops reperfusion injury. The nurse
understands that the primary mechanism of reperfusion injury involves:
A. Restoration of blood flow generating oxygen-derived free radicals and calcium overload
B. Persistent ischemia causing progressive ATP depletion and membrane failure
