[ADVANCED NSG 5140 Advanced Pathophysiology
Midterm] EXAM with Questions and Answers/Plus a
Rationale Updated 2026 A+/Instant Download PDF
Table of Contents
1. Cellular Injury and Adaptation
2. Genetics and Epigenetics
3. Inflammation and Tissue Repair
4. Immune Function and Hypersensitivity
5. Infectious Disease Pathophysiology
6. Neoplasia and Oncology
7. Fluid, Electrolyte, and Acid-Base Balance
8. Hematologic Disorders
9. Endocrine Pathophysiology
1. A 62-year-old patient presents with chronic hypertension. Echocardiography reveals significant
left ventricular hypertrophy. Which cellular adaptation is primarily responsible for this structural
change?
A. Hyperplasia
B. Hypertrophy
, C. Metaplasia
D. Dysplasia
Answer: B [Correct Answer]
Rationale: Hypertrophy is an increase in the size of cells in response to mechanical stress or
increased workload, such as chronic pressure overload in hypertension. Hyperplasia involves an
increase in cell number, while metaplasia is the replacement of one cell type with another, and
dysplasia refers to abnormal, disorganized cell growth, none of which primarily characterize left
ventricular compensatory response to hypertension.
2. A patient with severe sepsis develops acute tubular necrosis. Analysis of the cellular injury
reveals depletion of ATP. What is the immediate consequence of the Na+/K+ pump failure
during this ischemic state?
A. Intracellular dehydration
B. Intracellular sodium accumulation and cellular swelling
C. Increased active transport of calcium into the mitochondria
D. Enhanced protein synthesis
Answer: B [Correct Answer]
Rationale: When ATP is depleted, the Na+/K+ ATPase pump fails, leading to an influx of
sodium into the cell. Water follows the sodium osmotically, resulting in acute cellular swelling
(hydropic degeneration). A is incorrect because the cell swells, not dehydrates; C is incorrect
because calcium accumulates due to pump failure; D is incorrect because protein synthesis
decreases during ATP depletion.
3. A patient carries a germline mutation in the BRCA1 gene. Which mechanism best describes how
this mutation contributes to oncogenesis?
A. Constitutive activation of a proto-oncogene
B. Loss of function in a tumor suppressor gene
C. Epigenetic silencing of a growth factor receptor
D. Acceleration of the cell cycle via cyclin-dependent kinase overexpression
Answer: B [Correct Answer]
, Rationale: BRCA1 is a classic tumor suppressor gene involved in DNA repair; its mutation
results in the loss of function, preventing the repair of damaged DNA and promoting genomic
instability. A describes oncogene activation; C and D are potential mechanisms for cancer but
do not define the specific role of the BRCA1 tumor suppressor mutation.
4. During an inflammatory response, which chemical mediator is primarily responsible for inducing
vasodilation and increased capillary permeability at the site of tissue injury?
A. Thromboxane A2
B. Histamine
C. Leukotriene B4
D. C-reactive protein
Answer: B [Correct Answer]
Rationale: Histamine is released by mast cells during early inflammation and causes immediate
vasodilation and increased permeability. Thromboxane A2 promotes platelet aggregation;
Leukotriene B4 is a chemotactic agent for neutrophils; C-reactive protein is a marker of systemic
inflammation, not a primary vasodilator.
5. A patient exhibits a Type I hypersensitivity reaction. What is the fundamental immunological
event occurring during the sensitization phase?
A. Activation of T-cytotoxic cells
B. Production of IgE antibodies that bind to mast cells
C. Formation of antigen-antibody complexes
D. Delayed activation of macrophages
Answer: B [Correct Answer]
Rationale: Type I hypersensitivity is mediated by IgE antibodies, which, upon initial exposure,
sensitize mast cells and basophils. A describes Type IV hypersensitivity; C describes Type III
hypersensitivity; D describes the delayed-type hypersensitivity reaction.
6. In a patient with compensated metabolic acidosis, which physiological change would be
expected as an immediate compensatory mechanism?
A. Increased respiratory rate (hyperventilation)
B. Increased renal excretion of bicarbonate
, C. Decreased production of ammonia
D. Hypoventilation to retain carbon dioxide
Answer: A [Correct Answer]
Rationale: The respiratory system compensates for metabolic acidosis by increasing ventilation
to "blow off" CO2, thereby reducing carbonic acid levels in the blood. B and C would worsen the
acidosis; D is the response to metabolic alkalosis.
7. A patient presents with iron deficiency anemia. Which laboratory finding is most consistent with
a microcytic, hypochromic profile?
A. Elevated mean corpuscular volume (MCV)
B. Decreased mean corpuscular hemoglobin concentration (MCHC)
C. Increased ferritin levels
D. Decreased total iron-binding capacity (TIBC)
Answer: B [Correct Answer]
Rationale: Iron deficiency anemia results in small (microcytic) and pale (hypochromic) cells,
characterized by a low MCHC. A high MCV indicates macrocytic anemia; ferritin is typically
low, not high, in iron deficiency; TIBC is typically increased, not decreased.
8. Which clinical finding in a patient with systemic lupus erythematosus (SLE) is most suggestive
of a Type III hypersensitivity reaction?
A. Urticaria
B. Glomerulonephritis due to immune complex deposition
C. Contact dermatitis
D. Hemolytic anemia
Answer: B [Correct Answer]
Rationale: Type III hypersensitivity involves the deposition of circulating antigen-antibody
complexes in tissues, which is a hallmark of SLE-related glomerulonephritis. Urticaria is Type I;
contact dermatitis is Type IV; hemolytic anemia is typically Type II.
9. A patient is diagnosed with Syndrome of Inappropriate Antidiuretic Hormone (SIADH). Which
laboratory pattern would you expect to find?
Midterm] EXAM with Questions and Answers/Plus a
Rationale Updated 2026 A+/Instant Download PDF
Table of Contents
1. Cellular Injury and Adaptation
2. Genetics and Epigenetics
3. Inflammation and Tissue Repair
4. Immune Function and Hypersensitivity
5. Infectious Disease Pathophysiology
6. Neoplasia and Oncology
7. Fluid, Electrolyte, and Acid-Base Balance
8. Hematologic Disorders
9. Endocrine Pathophysiology
1. A 62-year-old patient presents with chronic hypertension. Echocardiography reveals significant
left ventricular hypertrophy. Which cellular adaptation is primarily responsible for this structural
change?
A. Hyperplasia
B. Hypertrophy
, C. Metaplasia
D. Dysplasia
Answer: B [Correct Answer]
Rationale: Hypertrophy is an increase in the size of cells in response to mechanical stress or
increased workload, such as chronic pressure overload in hypertension. Hyperplasia involves an
increase in cell number, while metaplasia is the replacement of one cell type with another, and
dysplasia refers to abnormal, disorganized cell growth, none of which primarily characterize left
ventricular compensatory response to hypertension.
2. A patient with severe sepsis develops acute tubular necrosis. Analysis of the cellular injury
reveals depletion of ATP. What is the immediate consequence of the Na+/K+ pump failure
during this ischemic state?
A. Intracellular dehydration
B. Intracellular sodium accumulation and cellular swelling
C. Increased active transport of calcium into the mitochondria
D. Enhanced protein synthesis
Answer: B [Correct Answer]
Rationale: When ATP is depleted, the Na+/K+ ATPase pump fails, leading to an influx of
sodium into the cell. Water follows the sodium osmotically, resulting in acute cellular swelling
(hydropic degeneration). A is incorrect because the cell swells, not dehydrates; C is incorrect
because calcium accumulates due to pump failure; D is incorrect because protein synthesis
decreases during ATP depletion.
3. A patient carries a germline mutation in the BRCA1 gene. Which mechanism best describes how
this mutation contributes to oncogenesis?
A. Constitutive activation of a proto-oncogene
B. Loss of function in a tumor suppressor gene
C. Epigenetic silencing of a growth factor receptor
D. Acceleration of the cell cycle via cyclin-dependent kinase overexpression
Answer: B [Correct Answer]
, Rationale: BRCA1 is a classic tumor suppressor gene involved in DNA repair; its mutation
results in the loss of function, preventing the repair of damaged DNA and promoting genomic
instability. A describes oncogene activation; C and D are potential mechanisms for cancer but
do not define the specific role of the BRCA1 tumor suppressor mutation.
4. During an inflammatory response, which chemical mediator is primarily responsible for inducing
vasodilation and increased capillary permeability at the site of tissue injury?
A. Thromboxane A2
B. Histamine
C. Leukotriene B4
D. C-reactive protein
Answer: B [Correct Answer]
Rationale: Histamine is released by mast cells during early inflammation and causes immediate
vasodilation and increased permeability. Thromboxane A2 promotes platelet aggregation;
Leukotriene B4 is a chemotactic agent for neutrophils; C-reactive protein is a marker of systemic
inflammation, not a primary vasodilator.
5. A patient exhibits a Type I hypersensitivity reaction. What is the fundamental immunological
event occurring during the sensitization phase?
A. Activation of T-cytotoxic cells
B. Production of IgE antibodies that bind to mast cells
C. Formation of antigen-antibody complexes
D. Delayed activation of macrophages
Answer: B [Correct Answer]
Rationale: Type I hypersensitivity is mediated by IgE antibodies, which, upon initial exposure,
sensitize mast cells and basophils. A describes Type IV hypersensitivity; C describes Type III
hypersensitivity; D describes the delayed-type hypersensitivity reaction.
6. In a patient with compensated metabolic acidosis, which physiological change would be
expected as an immediate compensatory mechanism?
A. Increased respiratory rate (hyperventilation)
B. Increased renal excretion of bicarbonate
, C. Decreased production of ammonia
D. Hypoventilation to retain carbon dioxide
Answer: A [Correct Answer]
Rationale: The respiratory system compensates for metabolic acidosis by increasing ventilation
to "blow off" CO2, thereby reducing carbonic acid levels in the blood. B and C would worsen the
acidosis; D is the response to metabolic alkalosis.
7. A patient presents with iron deficiency anemia. Which laboratory finding is most consistent with
a microcytic, hypochromic profile?
A. Elevated mean corpuscular volume (MCV)
B. Decreased mean corpuscular hemoglobin concentration (MCHC)
C. Increased ferritin levels
D. Decreased total iron-binding capacity (TIBC)
Answer: B [Correct Answer]
Rationale: Iron deficiency anemia results in small (microcytic) and pale (hypochromic) cells,
characterized by a low MCHC. A high MCV indicates macrocytic anemia; ferritin is typically
low, not high, in iron deficiency; TIBC is typically increased, not decreased.
8. Which clinical finding in a patient with systemic lupus erythematosus (SLE) is most suggestive
of a Type III hypersensitivity reaction?
A. Urticaria
B. Glomerulonephritis due to immune complex deposition
C. Contact dermatitis
D. Hemolytic anemia
Answer: B [Correct Answer]
Rationale: Type III hypersensitivity involves the deposition of circulating antigen-antibody
complexes in tissues, which is a hallmark of SLE-related glomerulonephritis. Urticaria is Type I;
contact dermatitis is Type IV; hemolytic anemia is typically Type II.
9. A patient is diagnosed with Syndrome of Inappropriate Antidiuretic Hormone (SIADH). Which
laboratory pattern would you expect to find?
