NR 507 Midterm Exam Advanced Pathophysiology
Chamberlain College of Nursing Question Bank (Latest
2026/2027 Edition) – 100% Correct Questions, Answers &
Detailed Rationales
Chamberlain University
Total Questions: 50
Time Allowed: 90 Minutes
Passing Score: 80%
Instructions: Select the BEST answer for each question based on advanced
pathophysiology principles and clinical reasoning. For SATA questions, select all that
apply.
SECTION 1: CELLULAR ADAPTATION, INJURY & NEOPLASIA
Questions 1–9
Question 1
A 68-year-old male with a 40 pack-year smoking history presents with a new 3 cm
spiculated lung mass. Biopsy reveals small cell carcinoma. Which pathophysiological
mechanism best explains the rapid growth and early metastasis characteristic of this
tumor?
A. Activation of proto-oncogenes with loss of tumor suppressor genes p53 and RB
B. Predominant reliance on aerobic metabolism with minimal lactate production
C. Extensive stromal desmoplasia creating a physical barrier to vascular invasion
D. High expression of E-cadherin promoting strong cell-to-cell adhesion
Correct Answer: A
Rationale: Small cell lung carcinoma (SCLC) is characterized by nearly universal
inactivation of tumor suppressor genes TP53 and RB1. These genetic alterations
,eliminate critical cell cycle checkpoints and apoptotic responses, permitting rapid
proliferation and early metastasis. SCLC exhibits a high mitotic index and
neuroendocrine differentiation. Option B is incorrect because many aggressive tumors
rely on Warburg effect (aerobic glycolysis). Option C describes a feature of scirrhous
breast cancer, not SCLC. Option D is incorrect because loss of E-cadherin (not high
expression) promotes metastasis by enabling epithelial-mesenchymal transition.
Question 2
A 72-year-old woman with peripheral arterial disease develops a dry, blackened great
toe. Microscopic examination reveals ghost outlines of cells with preserved tissue
architecture. Which type of necrosis is present, and what is the primary
pathophysiological mechanism?
A. Liquefactive necrosis; enzymatic digestion by neutrophil proteases
B. Coagulative necrosis; denaturation of structural proteins and enzymes
C. Caseous necrosis; granulomatous inflammation with activated macrophages
D. Fat necrosis; saponification by released fatty acids
Correct Answer: B
Rationale: Dry gangrene of the toe in peripheral arterial disease represents coagulative
necrosis. Ischemia denatures structural proteins and enzymes, but lysosomal
membranes remain intact initially, preserving tissue architecture as "ghost outlines."
Liquefactive necrosis (A) occurs in brain infarcts and abscesses due to enzymatic
digestion. Caseous necrosis (C) is characteristic of tuberculosis with cheese-like gross
appearance. Fat necrosis (D) occurs in pancreatic or breast tissue with calcium soap
formation.
Question 3
A 55-year-old male with chronic alcohol use disorder presents with epigastric pain
radiating to the back, nausea, and vomiting. Serum lipase is 1,200 U/L. CT shows
,peripancreatic fat stranding. Which pathophysiological process initiated the cellular
injury in the pancreatic acinar cells?
A. Activation of trypsinogen to trypsin within acinar cells causing autodigestion
B. Direct ethanol-mediated inhibition of ductal bicarbonate secretion only
C. Gallstone obstruction causing purely mechanical compression of acinar cells
D. Hypoxia-induced activation of xanthine oxidase generating hydrogen peroxide
Correct Answer: A
Rationale: Acute pancreatitis pathophysiology centers on premature activation of
trypsinogen to trypsin within pancreatic acinar cells. Trypsin then activates other
digestive enzymes (phospholipase A2, elastase, kallikrein), leading to autodigestion of
pancreatic tissue, acinar cell injury, and inflammation. While alcohol (B) and gallstones
(C) are etiologic factors, the common pathway involves intracellular enzyme activation.
Option D describes reperfusion injury mechanisms, not the primary pancreatitis
cascade.
Question 4
A pathologist examines a liver biopsy from a patient with hemochromatosis.
Hepatocytes demonstrate brown granular pigment accumulation. Which cellular
adaptation or injury process is demonstrated, and what is the nature of this pigment?
A. Metaplasia; bilirubin accumulation from cholestasis
B. Hypertrophy; glycogen storage from diabetes mellitus
C. Intracellular accumulation; hemosiderin (iron storage complex)
D. Dysplasia; lipofuscin from oxidative wear-and-tear
Correct Answer: C
Rationale: Hemochromatosis causes pathologic intracellular accumulation of iron
stored as hemosiderin, a golden-brown granular pigment visible with Prussian blue
staining. This represents an accumulation disorder, not a true adaptation. Metaplasia
(A) involves reversible change of one differentiated cell type to another. Hypertrophy (B)
, is increased cell size. Dysplasia (D) is disordered growth with nuclear atypia. Lipofuscin
is a wear-and-tear pigment unrelated to iron overload.
Question 5
A 45-year-old woman presents with a breast mass. Biopsy shows proliferation of ductal
epithelial cells with nuclear pleomorphism, hyperchromasia, and loss of normal polarity,
but no invasion through the basement membrane. Which pathophysiological term
describes this lesion?
A. Hyperplasia without atypia
B. Ductal carcinoma in situ (DCIS)
C. Lobular carcinoma in situ (LCIS)
D. Invasive ductal carcinoma
Correct Answer: B
Rationale: Ductal carcinoma in situ (DCIS) is characterized by proliferation of
malignant-appearing ductal epithelial cells confined by an intact basement membrane
without stromal invasion. The cytologic features described (pleomorphism,
hyperchromasia, loss of polarity) indicate neoplastic transformation. Hyperplasia
without atypia (A) lacks these malignant cytologic features. LCIS (C) involves terminal
duct lobular units, not ducts. Invasive ductal carcinoma (D) requires penetration of the
basement membrane.
Question 6
A patient receiving chemotherapy with cyclophosphamide develops severe bone
marrow suppression. Which pathophysiological mechanism of cell death is primarily
responsible for the therapeutic effect on rapidly dividing cancer cells?
A. Accidental necrosis from direct plasma membrane rupture
B. Apoptosis via activation of intrinsic mitochondrial pathway
C. Autophagy leading to cellular self-consumption and survival
D. Pyroptosis mediated by inflammasome activation
Chamberlain College of Nursing Question Bank (Latest
2026/2027 Edition) – 100% Correct Questions, Answers &
Detailed Rationales
Chamberlain University
Total Questions: 50
Time Allowed: 90 Minutes
Passing Score: 80%
Instructions: Select the BEST answer for each question based on advanced
pathophysiology principles and clinical reasoning. For SATA questions, select all that
apply.
SECTION 1: CELLULAR ADAPTATION, INJURY & NEOPLASIA
Questions 1–9
Question 1
A 68-year-old male with a 40 pack-year smoking history presents with a new 3 cm
spiculated lung mass. Biopsy reveals small cell carcinoma. Which pathophysiological
mechanism best explains the rapid growth and early metastasis characteristic of this
tumor?
A. Activation of proto-oncogenes with loss of tumor suppressor genes p53 and RB
B. Predominant reliance on aerobic metabolism with minimal lactate production
C. Extensive stromal desmoplasia creating a physical barrier to vascular invasion
D. High expression of E-cadherin promoting strong cell-to-cell adhesion
Correct Answer: A
Rationale: Small cell lung carcinoma (SCLC) is characterized by nearly universal
inactivation of tumor suppressor genes TP53 and RB1. These genetic alterations
,eliminate critical cell cycle checkpoints and apoptotic responses, permitting rapid
proliferation and early metastasis. SCLC exhibits a high mitotic index and
neuroendocrine differentiation. Option B is incorrect because many aggressive tumors
rely on Warburg effect (aerobic glycolysis). Option C describes a feature of scirrhous
breast cancer, not SCLC. Option D is incorrect because loss of E-cadherin (not high
expression) promotes metastasis by enabling epithelial-mesenchymal transition.
Question 2
A 72-year-old woman with peripheral arterial disease develops a dry, blackened great
toe. Microscopic examination reveals ghost outlines of cells with preserved tissue
architecture. Which type of necrosis is present, and what is the primary
pathophysiological mechanism?
A. Liquefactive necrosis; enzymatic digestion by neutrophil proteases
B. Coagulative necrosis; denaturation of structural proteins and enzymes
C. Caseous necrosis; granulomatous inflammation with activated macrophages
D. Fat necrosis; saponification by released fatty acids
Correct Answer: B
Rationale: Dry gangrene of the toe in peripheral arterial disease represents coagulative
necrosis. Ischemia denatures structural proteins and enzymes, but lysosomal
membranes remain intact initially, preserving tissue architecture as "ghost outlines."
Liquefactive necrosis (A) occurs in brain infarcts and abscesses due to enzymatic
digestion. Caseous necrosis (C) is characteristic of tuberculosis with cheese-like gross
appearance. Fat necrosis (D) occurs in pancreatic or breast tissue with calcium soap
formation.
Question 3
A 55-year-old male with chronic alcohol use disorder presents with epigastric pain
radiating to the back, nausea, and vomiting. Serum lipase is 1,200 U/L. CT shows
,peripancreatic fat stranding. Which pathophysiological process initiated the cellular
injury in the pancreatic acinar cells?
A. Activation of trypsinogen to trypsin within acinar cells causing autodigestion
B. Direct ethanol-mediated inhibition of ductal bicarbonate secretion only
C. Gallstone obstruction causing purely mechanical compression of acinar cells
D. Hypoxia-induced activation of xanthine oxidase generating hydrogen peroxide
Correct Answer: A
Rationale: Acute pancreatitis pathophysiology centers on premature activation of
trypsinogen to trypsin within pancreatic acinar cells. Trypsin then activates other
digestive enzymes (phospholipase A2, elastase, kallikrein), leading to autodigestion of
pancreatic tissue, acinar cell injury, and inflammation. While alcohol (B) and gallstones
(C) are etiologic factors, the common pathway involves intracellular enzyme activation.
Option D describes reperfusion injury mechanisms, not the primary pancreatitis
cascade.
Question 4
A pathologist examines a liver biopsy from a patient with hemochromatosis.
Hepatocytes demonstrate brown granular pigment accumulation. Which cellular
adaptation or injury process is demonstrated, and what is the nature of this pigment?
A. Metaplasia; bilirubin accumulation from cholestasis
B. Hypertrophy; glycogen storage from diabetes mellitus
C. Intracellular accumulation; hemosiderin (iron storage complex)
D. Dysplasia; lipofuscin from oxidative wear-and-tear
Correct Answer: C
Rationale: Hemochromatosis causes pathologic intracellular accumulation of iron
stored as hemosiderin, a golden-brown granular pigment visible with Prussian blue
staining. This represents an accumulation disorder, not a true adaptation. Metaplasia
(A) involves reversible change of one differentiated cell type to another. Hypertrophy (B)
, is increased cell size. Dysplasia (D) is disordered growth with nuclear atypia. Lipofuscin
is a wear-and-tear pigment unrelated to iron overload.
Question 5
A 45-year-old woman presents with a breast mass. Biopsy shows proliferation of ductal
epithelial cells with nuclear pleomorphism, hyperchromasia, and loss of normal polarity,
but no invasion through the basement membrane. Which pathophysiological term
describes this lesion?
A. Hyperplasia without atypia
B. Ductal carcinoma in situ (DCIS)
C. Lobular carcinoma in situ (LCIS)
D. Invasive ductal carcinoma
Correct Answer: B
Rationale: Ductal carcinoma in situ (DCIS) is characterized by proliferation of
malignant-appearing ductal epithelial cells confined by an intact basement membrane
without stromal invasion. The cytologic features described (pleomorphism,
hyperchromasia, loss of polarity) indicate neoplastic transformation. Hyperplasia
without atypia (A) lacks these malignant cytologic features. LCIS (C) involves terminal
duct lobular units, not ducts. Invasive ductal carcinoma (D) requires penetration of the
basement membrane.
Question 6
A patient receiving chemotherapy with cyclophosphamide develops severe bone
marrow suppression. Which pathophysiological mechanism of cell death is primarily
responsible for the therapeutic effect on rapidly dividing cancer cells?
A. Accidental necrosis from direct plasma membrane rupture
B. Apoptosis via activation of intrinsic mitochondrial pathway
C. Autophagy leading to cellular self-consumption and survival
D. Pyroptosis mediated by inflammasome activation
