NR 507: Advanced Pathophysiology
Final Exam Preparation
Chamberlain University | 2026/2027
150 Questions with Expert Rationales
Instructions
• This examination covers advanced pathophysiology concepts across all body
systems.
• Select the single best answer for each question.
• Rationales explain the underlying pathophysiology, mechanisms of disease, and
clinical correlations.
Section 1: Cellular Biology, Genetics, and Immunology
(Questions 1-20)
1. A 45-year-old male is diagnosed with non-small cell lung cancer. Genetic
analysis reveals a mutation in the p53 tumor suppressor gene. Which of the
following best describes the role of p53 in normal cellular function?
A. Promotes cell division through growth factor signaling
B. Initiates apoptosis and cell cycle arrest in response to DNA damage
C. Activates telomerase to prevent cellular senescence
D. Inhibits angiogenesis to prevent tumor growth
Answer: B
Expert Rationale: The p53 tumor suppressor gene, known as the "guardian of the
genome," responds to DNA damage by inducing cell cycle arrest (allowing DNA
,repair) or initiating apoptosis if damage is irreparable. Loss of p53 function allows
damaged cells to proliferate, contributing to carcinogenesis.
2. A 28-year-old female with systemic lupus erythematosus (SLE) has a positive
antinuclear antibody (ANA) test. Which type of hypersensitivity reaction is
primarily responsible for SLE?
A. Type I (IgE-mediated)
B. Type II (antibody-mediated cytotoxic)
C. Type III (immune complex-mediated)
D. Type IV (cell-mediated)
Answer: C
Expert Rationale: SLE is a Type III hypersensitivity reaction characterized by the
formation of immune complexes (antibody-antigen) that deposit in tissues (kidneys,
skin, joints), leading to complement activation and inflammation. ANA is a marker of
autoantibody production.
3. A 6-year-old boy with severe combined immunodeficiency (SCID) presents
with recurrent, life-threatening infections. Which of the following
pathophysiologic mechanisms underlies SCID?
A. Impaired B cell function with normal T cells
B. Deficiency of both T cells and B cells due to defective lymphoid development
C. Isolated IgA deficiency with normal IgG and IgM
D. Complement C3 deficiency leading to opsonization defects
Answer: B
Expert Rationale: SCID is characterized by severe defects in both T cell and B cell
development, often due to mutations in genes involved in lymphocyte maturation
(e.g., adenosine deaminase deficiency). This results in profound immunodeficiency
with susceptibility to bacterial, viral, and fungal infections.
4. A 55-year-old male with chronic hepatitis C develops hepatocellular
carcinoma. Which of the following best describes the role of chronic
inflammation in carcinogenesis?
A. Chronic inflammation directly mutates tumor suppressor genes
B. Inflammatory cytokines promote cellular proliferation and angiogenesis while
inhibiting apoptosis
C. Inflammation suppresses the immune system's ability to detect cancer cells
D. Inflammation causes telomere shortening leading to genomic instability
Answer: B
Expert Rationale: Chronic inflammation creates a microenvironment rich in
cytokines (IL-6, TNF-α), growth factors, and reactive oxygen species that promote
,cellular proliferation, inhibit apoptosis, and stimulate angiogenesis, contributing to
the development of malignancy.
5. A 72-year-old female is diagnosed with anemia of chronic disease. Which of
the following best describes the pathophysiology of this condition?
A. Decreased erythropoietin production due to renal failure
B. Impaired iron utilization due to hepcidin upregulation
C. Vitamin B12 deficiency due to malabsorption
D. Hemolysis due to autoantibody formation
Answer: B
Expert Rationale: Anemia of chronic disease is mediated by hepcidin, an acute-
phase protein that is upregulated in inflammatory states. Hepcidin blocks iron export
from macrophages and enterocytes, leading to functional iron deficiency despite
adequate iron stores.
6. A 30-year-old female with a family history of breast cancer undergoes
genetic testing and is found to have a BRCA1 mutation. Which of the following
best describes the function of BRCA1 in normal cells?
A. Promotes cell cycle progression through G1/S checkpoint
B. Facilitates DNA double-strand break repair via homologous recombination
C. Prevents angiogenesis by inhibiting VEGF
D. Activates telomerase to maintain chromosomal integrity
Answer: B
Expert Rationale: BRCA1 and BRCA2 are tumor suppressor genes involved in
DNA double-strand break repair through homologous recombination. Mutations
impair this repair mechanism, leading to genomic instability and increased risk of
breast, ovarian, and other cancers.
7. A 25-year-old male with type 1 diabetes is at risk for diabetic ketoacidosis
(DKA). Which of the following pathophysiologic mechanisms contributes to the
development of DKA?
A. Increased insulin secretion leading to cellular glucose uptake
B. Decreased counter-regulatory hormones (glucagon, cortisol, epinephrine)
C. Increased lipolysis and ketogenesis due to absolute insulin deficiency
D. Enhanced peripheral glucose utilization
Answer: C
Expert Rationale: In type 1 diabetes, absolute insulin deficiency leads to
unopposed counter-regulatory hormones (glucagon, cortisol, epinephrine), which
promote lipolysis and ketogenesis. This results in the accumulation of ketone bodies,
leading to metabolic acidosis.
, 8. A 68-year-old male is diagnosed with multiple myeloma. Which of the
following laboratory findings is most characteristic of this condition?
A. Elevated serum ferritin
B. Monoclonal spike on serum protein electrophoresis
C. Decreased serum calcium
D. Positive direct Coombs test
Answer: B
Expert Rationale: Multiple myeloma is characterized by the proliferation of
malignant plasma cells that produce a monoclonal immunoglobulin (M protein),
which appears as a monoclonal spike (M spike) on serum protein electrophoresis.
Other features include lytic bone lesions, hypercalcemia, and renal impairment.
9. A 42-year-old female with Hashimoto's thyroiditis presents with fatigue,
weight gain, and cold intolerance. Which of the following best describes the
pathogenesis of Hashimoto's thyroiditis?
A. Autoimmune destruction of thyroid tissue by T cells and autoantibodies
B. Thyroid-stimulating immunoglobulin (TSI) binding to TSH receptors
C. Viral infection causing transient thyroid inflammation
D. Iodine deficiency leading to compensatory goiter
Answer: A
Expert Rationale: Hashimoto's thyroiditis is an autoimmune disorder
characterized by T cell-mediated destruction of thyroid follicles and the presence of
autoantibodies (anti-thyroperoxidase, anti-thyroglobulin), leading to progressive
hypothyroidism.
10. A 55-year-old male with a history of alcohol use disorder presents with
jaundice and ascites. Liver biopsy reveals micronodular cirrhosis. Which of the
following pathophysiologic changes contributes to the development of ascites
in cirrhosis?
A. Decreased hepatic production of albumin leading to decreased plasma oncotic
pressure
B. Increased hepatic production of clotting factors
C. Decreased portal venous pressure
D. Increased bile acid production
Answer: A
Expert Rationale: In cirrhosis, decreased hepatic synthetic function leads to
hypoalbuminemia, reducing plasma oncotic pressure and contributing to fluid
extravasation. Additionally, portal hypertension increases hydrostatic pressure,
further promoting ascites formation.
Final Exam Preparation
Chamberlain University | 2026/2027
150 Questions with Expert Rationales
Instructions
• This examination covers advanced pathophysiology concepts across all body
systems.
• Select the single best answer for each question.
• Rationales explain the underlying pathophysiology, mechanisms of disease, and
clinical correlations.
Section 1: Cellular Biology, Genetics, and Immunology
(Questions 1-20)
1. A 45-year-old male is diagnosed with non-small cell lung cancer. Genetic
analysis reveals a mutation in the p53 tumor suppressor gene. Which of the
following best describes the role of p53 in normal cellular function?
A. Promotes cell division through growth factor signaling
B. Initiates apoptosis and cell cycle arrest in response to DNA damage
C. Activates telomerase to prevent cellular senescence
D. Inhibits angiogenesis to prevent tumor growth
Answer: B
Expert Rationale: The p53 tumor suppressor gene, known as the "guardian of the
genome," responds to DNA damage by inducing cell cycle arrest (allowing DNA
,repair) or initiating apoptosis if damage is irreparable. Loss of p53 function allows
damaged cells to proliferate, contributing to carcinogenesis.
2. A 28-year-old female with systemic lupus erythematosus (SLE) has a positive
antinuclear antibody (ANA) test. Which type of hypersensitivity reaction is
primarily responsible for SLE?
A. Type I (IgE-mediated)
B. Type II (antibody-mediated cytotoxic)
C. Type III (immune complex-mediated)
D. Type IV (cell-mediated)
Answer: C
Expert Rationale: SLE is a Type III hypersensitivity reaction characterized by the
formation of immune complexes (antibody-antigen) that deposit in tissues (kidneys,
skin, joints), leading to complement activation and inflammation. ANA is a marker of
autoantibody production.
3. A 6-year-old boy with severe combined immunodeficiency (SCID) presents
with recurrent, life-threatening infections. Which of the following
pathophysiologic mechanisms underlies SCID?
A. Impaired B cell function with normal T cells
B. Deficiency of both T cells and B cells due to defective lymphoid development
C. Isolated IgA deficiency with normal IgG and IgM
D. Complement C3 deficiency leading to opsonization defects
Answer: B
Expert Rationale: SCID is characterized by severe defects in both T cell and B cell
development, often due to mutations in genes involved in lymphocyte maturation
(e.g., adenosine deaminase deficiency). This results in profound immunodeficiency
with susceptibility to bacterial, viral, and fungal infections.
4. A 55-year-old male with chronic hepatitis C develops hepatocellular
carcinoma. Which of the following best describes the role of chronic
inflammation in carcinogenesis?
A. Chronic inflammation directly mutates tumor suppressor genes
B. Inflammatory cytokines promote cellular proliferation and angiogenesis while
inhibiting apoptosis
C. Inflammation suppresses the immune system's ability to detect cancer cells
D. Inflammation causes telomere shortening leading to genomic instability
Answer: B
Expert Rationale: Chronic inflammation creates a microenvironment rich in
cytokines (IL-6, TNF-α), growth factors, and reactive oxygen species that promote
,cellular proliferation, inhibit apoptosis, and stimulate angiogenesis, contributing to
the development of malignancy.
5. A 72-year-old female is diagnosed with anemia of chronic disease. Which of
the following best describes the pathophysiology of this condition?
A. Decreased erythropoietin production due to renal failure
B. Impaired iron utilization due to hepcidin upregulation
C. Vitamin B12 deficiency due to malabsorption
D. Hemolysis due to autoantibody formation
Answer: B
Expert Rationale: Anemia of chronic disease is mediated by hepcidin, an acute-
phase protein that is upregulated in inflammatory states. Hepcidin blocks iron export
from macrophages and enterocytes, leading to functional iron deficiency despite
adequate iron stores.
6. A 30-year-old female with a family history of breast cancer undergoes
genetic testing and is found to have a BRCA1 mutation. Which of the following
best describes the function of BRCA1 in normal cells?
A. Promotes cell cycle progression through G1/S checkpoint
B. Facilitates DNA double-strand break repair via homologous recombination
C. Prevents angiogenesis by inhibiting VEGF
D. Activates telomerase to maintain chromosomal integrity
Answer: B
Expert Rationale: BRCA1 and BRCA2 are tumor suppressor genes involved in
DNA double-strand break repair through homologous recombination. Mutations
impair this repair mechanism, leading to genomic instability and increased risk of
breast, ovarian, and other cancers.
7. A 25-year-old male with type 1 diabetes is at risk for diabetic ketoacidosis
(DKA). Which of the following pathophysiologic mechanisms contributes to the
development of DKA?
A. Increased insulin secretion leading to cellular glucose uptake
B. Decreased counter-regulatory hormones (glucagon, cortisol, epinephrine)
C. Increased lipolysis and ketogenesis due to absolute insulin deficiency
D. Enhanced peripheral glucose utilization
Answer: C
Expert Rationale: In type 1 diabetes, absolute insulin deficiency leads to
unopposed counter-regulatory hormones (glucagon, cortisol, epinephrine), which
promote lipolysis and ketogenesis. This results in the accumulation of ketone bodies,
leading to metabolic acidosis.
, 8. A 68-year-old male is diagnosed with multiple myeloma. Which of the
following laboratory findings is most characteristic of this condition?
A. Elevated serum ferritin
B. Monoclonal spike on serum protein electrophoresis
C. Decreased serum calcium
D. Positive direct Coombs test
Answer: B
Expert Rationale: Multiple myeloma is characterized by the proliferation of
malignant plasma cells that produce a monoclonal immunoglobulin (M protein),
which appears as a monoclonal spike (M spike) on serum protein electrophoresis.
Other features include lytic bone lesions, hypercalcemia, and renal impairment.
9. A 42-year-old female with Hashimoto's thyroiditis presents with fatigue,
weight gain, and cold intolerance. Which of the following best describes the
pathogenesis of Hashimoto's thyroiditis?
A. Autoimmune destruction of thyroid tissue by T cells and autoantibodies
B. Thyroid-stimulating immunoglobulin (TSI) binding to TSH receptors
C. Viral infection causing transient thyroid inflammation
D. Iodine deficiency leading to compensatory goiter
Answer: A
Expert Rationale: Hashimoto's thyroiditis is an autoimmune disorder
characterized by T cell-mediated destruction of thyroid follicles and the presence of
autoantibodies (anti-thyroperoxidase, anti-thyroglobulin), leading to progressive
hypothyroidism.
10. A 55-year-old male with a history of alcohol use disorder presents with
jaundice and ascites. Liver biopsy reveals micronodular cirrhosis. Which of the
following pathophysiologic changes contributes to the development of ascites
in cirrhosis?
A. Decreased hepatic production of albumin leading to decreased plasma oncotic
pressure
B. Increased hepatic production of clotting factors
C. Decreased portal venous pressure
D. Increased bile acid production
Answer: A
Expert Rationale: In cirrhosis, decreased hepatic synthetic function leads to
hypoalbuminemia, reducing plasma oncotic pressure and contributing to fluid
extravasation. Additionally, portal hypertension increases hydrostatic pressure,
further promoting ascites formation.
