WGU D236 Exam Pathophysiology Objective Assessment ACTUAL EXAM 2026/2027 | WGU D236 Pathophysiology OA | Verified Q&A | Pass Guaranteed - A+ Graded

WGU D236 Exam Pathophysiology Objective
Assessment ACTUAL EXAM 2026/2027 |
WGU D236 Pathophysiology OA | Verified
Q&A | Pass Guaranteed - A+ Graded


Section 1: Cellular & Genetic Pathophysiology (Questions 1–15)

Q1: A 45-year-old male with a history of heavy alcohol use presents with liver enlargement. Histology
reveals enlarged hepatocytes with increased cytoplasmic volume. The nurse recognizes this cellular
adaptation as:

 A. Atrophy

 B. [CORRECT] Hypertrophy

 C. Hyperplasia

 D. Metaplasia

Correct Answer: B Rationale: Hypertrophy is an increase in cell size resulting in enlarged tissue mass
without an increase in cell number. In alcoholic liver disease, hepatocytes undergo hypertrophy due to
accumulated metabolic byproducts and increased protein synthesis demands, leading to hepatomegaly.



Q2: A 60-year-old smoker develops chronic bronchitis. Bronchial epithelial cells transform from
pseudostratified ciliated columnar to stratified squamous epithelium. This change is best described as:

 A. Dysplasia

 B. Hypertrophy

 C. [CORRECT] Metaplasia

 D. Hyperplasia

Correct Answer: C Rationale: Metaplasia is the reversible replacement of one differentiated cell type
with another better suited to withstand an environmental stressor. The transformation from ciliated

,columnar to squamous epithelium in chronic smokers represents an adaptive response to protect
against chemical irritation, though it increases cancer risk over time.



Q3: A tissue sample shows cells with abnormal variations in size, shape, and nuclear appearance, but the
basement membrane remains intact. The nurse identifies this as:

 A. Benign neoplasia

 B. [CORRECT] Dysplasia

 C. Carcinoma in situ

 D. Metaplasia

Correct Answer: B Rationale: Dysplasia is characterized by disordered cellular development with
variations in cell size and shape, nuclear enlargement, hyperchromasia, and increased mitotic activity.
Unlike carcinoma in situ, dysplasia does not involve full-thickness epithelial replacement, and the
basement membrane remains intact, making it potentially reversible if the causative agent is removed.



Q4: Coagulative necrosis is most commonly associated with which pathological condition?

 A. Cerebral hypoxia

 B. [CORRECT] Myocardial infarction

 C. Acute pancreatitis

 D. Meningococcemia

Correct Answer: B Rationale: Coagulative necrosis results from ischemia that denatures structural
proteins and enzymes, preserving tissue architecture for several days. It is the characteristic pattern of
cell death in myocardial infarction, where the gross outline of dead cells is maintained despite loss of
nuclei, creating a firm, pale infarcted area.



Q5: A patient with sickle cell disease experiences vaso-occlusive crisis. The underlying genetic
mechanism is best described as:

 A. A chromosomal deletion

 B. [CORRECT] A single point mutation causing substitution of valine for glutamic acid at position
6 of the beta-globin chain

,  C. A frameshift mutation

 D. A trinucleotide repeat expansion

Correct Answer: B Rationale: Sickle cell disease is caused by a missense mutation in the HBB gene,
where a single nucleotide substitution (GAG → GTG) results in valine replacing glutamic acid at the sixth
position of the beta-globin polypeptide. This amino acid change causes hemoglobin S to polymerize
under deoxygenated conditions, distorting erythrocytes into sickle shapes.



Q6: A 25-year-old female presents with bilateral breast masses and a family history of breast cancer in
her mother and maternal aunt. Genetic testing reveals a mutation in the BRCA1 gene. This pattern of
inheritance is most consistent with:

 A. Autosomal recessive

 B. X-linked recessive

 C. [CORRECT] Autosomal dominant

 D. Mitochondrial inheritance

Correct Answer: C Rationale: BRCA1-associated hereditary breast and ovarian cancer syndrome follows
an autosomal dominant inheritance pattern. Affected individuals inherit one mutated allele and one
normal allele; the mutation in the single functional copy is sufficient to significantly increase cancer risk
through loss of tumor suppressor function.



Q7: A newborn male exhibits severe muscle weakness, hypotonia, and respiratory distress. Genetic
testing confirms Duchenne muscular dystrophy. The inheritance pattern for this disorder is:

 A. Autosomal dominant

 B. Autosomal recessive

 C. [CORRECT] X-linked recessive

 D. Y-linked

Correct Answer: C Rationale: Duchenne muscular dystrophy is caused by mutations in the DMD gene
located on the X chromosome. Because males have only one X chromosome, a single mutated allele
results in disease expression. Females are typically carriers due to X-inactivation and lyonization, rarely
showing severe phenotypes unless X-inactivation is skewed.

, Q8: A 35-year-old female with a history of endometrial hyperplasia is found to have endometrial
adenocarcinoma. The pathophysiological hallmark distinguishing this malignant neoplasm from benign
hyperplasia is:

 A. Increased cell size

 B. [CORRECT] Invasion through the basement membrane with potential for metastasis

 C. Increased mitotic rate alone

 D. Cellular atypia without architectural distortion

Correct Answer: B Rationale: The defining feature of malignancy is invasion through the basement
membrane into surrounding tissues, with the potential for metastatic spread to distant sites via
lymphatic or hematogenous routes. While cellular atypia and increased mitosis occur in both dysplasia
and malignancy, only invasive behavior characterizes cancer.



Q9: A patient with severe ischemia to the lower extremity develops tissue death characterized by
liquefaction of dead cells into a viscous liquid. The nurse identifies this as:

 A. Coagulative necrosis

 B. [CORRECT] Liquefactive necrosis

 C. Caseous necrosis

 D. Fat necrosis

Correct Answer: B Rationale: Liquefactive necrosis occurs when enzymatic digestion of dead cells
results in transformation of tissue into a liquid viscous mass. It is characteristic of ischemic injury in the
brain (due to high lipid content and release of lysosomal enzymes) and bacterial infections where
neutrophil-derived hydrolases digest cellular debris.



Q10: A 50-year-old male with chronic gastroesophageal reflux disease develops Barrett esophagus. The
cellular adaptation observed in the distal esophagus is:

 A. Hypertrophy of squamous epithelium

 B. [CORRECT] Metaplasia from squamous to columnar epithelium

 C. Hyperplasia of glandular tissue

 D. Dysplasia with loss of basement membrane integrity