NUR 5240 Advanced Pathophysiology Ultimate Exam Review
Bundle | Final Exam Practice QUESTIONs, Verified Answers &
Detailed Rationales | 2026/2027 Edition
QUESTION 1
Which of the following cellular alterations is considered a hallmark of
irreversible cellular injury and impending necrosis?
• A. Decreased intracellular ATP secondary to mitochondrial
oxidative phosphorylation failure
• B. Cellular swelling due to acute sodium and water influx
• C. Detachment of ribosomes from the rough endoplasmic
reticulum
• D. Severe mitochondrial calcium overload and rupture of
lysosomal membranes
Correct Answer: D. Severe mitochondrial calcium overload and rupture
of lysosomal membranes
Detailed Rationale: While ATP depletion, cellular swelling, and
ribosome detachment are characteristic of reversible cell injury, severe
mitochondrial membrane damage with massive calcium influx and
lysosomal enzyme leakage signify irreversible injury and cell death
(necrosis).
QUESTION 2
,An advanced pathophysiology student is studying epigenetic
mechanisms. Which of the following best describes the primary
functional consequence of DNA methylation?
• A. Loosening of chromatin structure to promote active gene
transcription
• B. Silencing or downregulating gene expression by inhibiting
transcription factor binding
• C. Permanent deletion of nucleotide sequences from the coding
genome
• D. Direct translation of messenger RNA into aberrant proteins
Correct Answer: B. Silencing or downregulating gene expression by
inhibiting transcription factor binding
Detailed Rationale: DNA methylation involves the addition of a methyl
group to cytosine bases, which compacts chromatin and prevents
transcription factors from accessing DNA, effectively silencing gene
expression without altering the underlying sequence.
QUESTION 3
A patient presents with severe hyponatremia, high urine osmolality, low
serum osmolality, and concentrated urine despite euvolemia. This
clinical presentation is most characteristic of:
• A. Diabetes Insipidus (DI)
• B. Syndrome of Inappropriate Antidiuretic Hormone Secretion
(SIADH)
• C. Primary Adrenal Insufficiency (Addison's disease)
, • D. Diabetic Ketoacidosis (DKA)
Correct Answer: B. Syndrome of Inappropriate Antidiuretic Hormone
Secretion (SIADH)
Detailed Rationale: SIADH causes excessive, unregulated release of
ADH, leading to free water retention, expanded extracellular fluid
volume, dilutional hyponatremia, concentrated urine, and low serum
osmolality.
QUESTION 4
Anaphylaxis following a bee sting is classified under which type of
hypersensitivity reaction?
• A. Type I (IgE-mediated hypersensitivity)
• B. Type II (Tissue-specific cytotoxic hypersensitivity)
• C. Type III (Immune complex-mediated hypersensitivity)
• D. Type IV (Cell-mediated delayed-type hypersensitivity)
Correct Answer: A. Type I (IgE-mediated hypersensitivity)
Detailed Rationale: Type I hypersensitivity is an immediate, IgE-
mediated reaction where allergens bind to mast cells and basophils,
triggering rapid degranulation and the release of histamine,
leukotrienes, and inflammatory mediators.
QUESTION 5
Mutations in the TP53 tumor suppressor gene are heavily implicated in
human cancers. What is the normal physiological function of the p53
protein?
• A. Promoting unregulated cellular mitosis and proliferation
, • B. Enhancing angiogenesis within tumor microenvironments
• C. Detecting DNA damage and inducing cell cycle arrest or
apoptosis
• D. Inhibiting the immune system's cytotoxic T-cell response
Correct Answer: C. Detecting DNA damage and inducing cell cycle arrest
or apoptosis
Detailed Rationale: Wild-type p53 acts as the "guardian of the genome"
by halting the cell cycle to allow DNA repair or triggering apoptosis if
genetic damage is unrepairable, thereby preventing malignant
transformation.
QUESTION 6
A patient is diagnosed with Heart Failure with Preserved Ejection
Fraction (HFpEF). Which core pathophysiological mechanism underlies
this condition?
• A. Systolic dysfunction characterized by a dilated, thin-walled left
ventricle and severely reduced ejection fraction
• B. Diastolic dysfunction characterized by impaired ventricular
relaxation and ventricular wall stiffness, limiting filling capacity
• C. Primary pulmonary hypertension leading exclusively to left-
sided valvular regurgitation
• D. Acute myocardial infarction causing total destruction of the
cardiac conduction system
Bundle | Final Exam Practice QUESTIONs, Verified Answers &
Detailed Rationales | 2026/2027 Edition
QUESTION 1
Which of the following cellular alterations is considered a hallmark of
irreversible cellular injury and impending necrosis?
• A. Decreased intracellular ATP secondary to mitochondrial
oxidative phosphorylation failure
• B. Cellular swelling due to acute sodium and water influx
• C. Detachment of ribosomes from the rough endoplasmic
reticulum
• D. Severe mitochondrial calcium overload and rupture of
lysosomal membranes
Correct Answer: D. Severe mitochondrial calcium overload and rupture
of lysosomal membranes
Detailed Rationale: While ATP depletion, cellular swelling, and
ribosome detachment are characteristic of reversible cell injury, severe
mitochondrial membrane damage with massive calcium influx and
lysosomal enzyme leakage signify irreversible injury and cell death
(necrosis).
QUESTION 2
,An advanced pathophysiology student is studying epigenetic
mechanisms. Which of the following best describes the primary
functional consequence of DNA methylation?
• A. Loosening of chromatin structure to promote active gene
transcription
• B. Silencing or downregulating gene expression by inhibiting
transcription factor binding
• C. Permanent deletion of nucleotide sequences from the coding
genome
• D. Direct translation of messenger RNA into aberrant proteins
Correct Answer: B. Silencing or downregulating gene expression by
inhibiting transcription factor binding
Detailed Rationale: DNA methylation involves the addition of a methyl
group to cytosine bases, which compacts chromatin and prevents
transcription factors from accessing DNA, effectively silencing gene
expression without altering the underlying sequence.
QUESTION 3
A patient presents with severe hyponatremia, high urine osmolality, low
serum osmolality, and concentrated urine despite euvolemia. This
clinical presentation is most characteristic of:
• A. Diabetes Insipidus (DI)
• B. Syndrome of Inappropriate Antidiuretic Hormone Secretion
(SIADH)
• C. Primary Adrenal Insufficiency (Addison's disease)
, • D. Diabetic Ketoacidosis (DKA)
Correct Answer: B. Syndrome of Inappropriate Antidiuretic Hormone
Secretion (SIADH)
Detailed Rationale: SIADH causes excessive, unregulated release of
ADH, leading to free water retention, expanded extracellular fluid
volume, dilutional hyponatremia, concentrated urine, and low serum
osmolality.
QUESTION 4
Anaphylaxis following a bee sting is classified under which type of
hypersensitivity reaction?
• A. Type I (IgE-mediated hypersensitivity)
• B. Type II (Tissue-specific cytotoxic hypersensitivity)
• C. Type III (Immune complex-mediated hypersensitivity)
• D. Type IV (Cell-mediated delayed-type hypersensitivity)
Correct Answer: A. Type I (IgE-mediated hypersensitivity)
Detailed Rationale: Type I hypersensitivity is an immediate, IgE-
mediated reaction where allergens bind to mast cells and basophils,
triggering rapid degranulation and the release of histamine,
leukotrienes, and inflammatory mediators.
QUESTION 5
Mutations in the TP53 tumor suppressor gene are heavily implicated in
human cancers. What is the normal physiological function of the p53
protein?
• A. Promoting unregulated cellular mitosis and proliferation
, • B. Enhancing angiogenesis within tumor microenvironments
• C. Detecting DNA damage and inducing cell cycle arrest or
apoptosis
• D. Inhibiting the immune system's cytotoxic T-cell response
Correct Answer: C. Detecting DNA damage and inducing cell cycle arrest
or apoptosis
Detailed Rationale: Wild-type p53 acts as the "guardian of the genome"
by halting the cell cycle to allow DNA repair or triggering apoptosis if
genetic damage is unrepairable, thereby preventing malignant
transformation.
QUESTION 6
A patient is diagnosed with Heart Failure with Preserved Ejection
Fraction (HFpEF). Which core pathophysiological mechanism underlies
this condition?
• A. Systolic dysfunction characterized by a dilated, thin-walled left
ventricle and severely reduced ejection fraction
• B. Diastolic dysfunction characterized by impaired ventricular
relaxation and ventricular wall stiffness, limiting filling capacity
• C. Primary pulmonary hypertension leading exclusively to left-
sided valvular regurgitation
• D. Acute myocardial infarction causing total destruction of the
cardiac conduction system
