GU D115 ADVANCED
W
PATHOPHYSIOLOGY OA 2026-2027 |
Actual Questions & Detailed Answers |
Test Bank | Study Guide | Pass
Guaranteed - A+ Graded
[UNIT 1: CELLULAR ADAPTATION, INJURY & GENETICS - 75 Questions]
1. A 68-year-old male with chronic obstructive pulmonary disease (COPD) presents with
decreased muscle mass in his quadriceps. The nurse practitioner identifies this as atrophy.
What is the primary pathophysiological mechanism?
A. Increased protein synthesis leading to cellular enlargement
B. Decrease in cell size due to reduced workload, denervation, ischemia, or malnutrition
[CORRECT]
C. Replacement of one differentiated cell type with another
D. Abnormal changes in cell size, shape, and organization
Rationale: Atrophy is defined as a decrease in cell size. In this patient, reduced physical activity
due to COPD leads to decreased workload on the quadriceps muscles, resulting in protein
degradation exceeding synthesis. Denervation, ischemia, and malnutrition are other common
causes. Option A describes hypertrophy, C describes metaplasia, and D describes dysplasia.
2. A patient with long-standing hypertension is found to have left ventricular enlargement on
echocardiogram. The pathophysiology involves which cellular adaptation?
A. Hyperplasia
B. Hypertrophy [CORRECT]
C. Metaplasia
D. Dysplasia
Rationale: Hypertrophy is an increase in cell SIZE (not number) due to increased workload. The
left ventricle hypertrophies in response to chronic pressure overload from hypertension.
Angiotensin II is intimately associated with the pathogenesis of cardiac hypertrophy and heart
failure by increasing cardiovascular mechanical load. This differs from hyperplasia (increase in
cell number), metaplasia (cell type replacement), and dysplasia (disordered growth).
3. Which hormone is most intimately associated with the pathogenesis of cardiac hypertrophy
and heart failure in a patient with chronic hypertension?
A. Aldosterone
B. Angiotensin II [CORRECT]
, . Natriuretic peptide
C
D. Endothelin
Rationale: Angiotensin II causes increased cardiovascular mechanical load that can
deleteriously affect heart function. Early myocardial response includes an increase in cardiac
Angiotensin II protein levels, which is intimately associated with pathogenesis of cardiac
hypertrophy and heart failure. While aldosterone and endothelin contribute to remodeling,
angiotensin II is the primary driver.
4. A 55-year-old male presents with urinary hesitancy and frequency. Digital rectal exam reveals
an enlarged prostate gland. This enlargement represents which cellular adaptation?
A. Hypertrophy
B. Hyperplasia [CORRECT]
C. Metaplasia
D. Anaplasia
Rationale: Benign prostatic hyperplasia (BPH) involves an increase in cell NUMBER
(hyperplasia) due to hormonal stimulation (dihydrotestosterone) and aging. The prostate gland
enlarges due to both hyperplasia and hypertrophy of glandular and stromal elements, but the
primary pathological process is hyperplasia. This is a non-neoplastic, reversible process.
5. A patient with chronic gastroesophageal reflux disease (GERD) undergoes endoscopy,
revealing columnar epithelium in the distal esophagus. This finding represents:
A. Dysplasia
B. Metaplasia [CORRECT]
C. Hyperplasia
D. Hypertrophy
Rationale: Barrett esophagus is the classic example of metaplasia—replacement of one
differentiated cell type (squamous epithelium) with another (columnar epithelium) due to chronic
irritation from acid reflux. This is a protective adaptation but increases risk for adenocarcinoma.
Dysplasia would show abnormal cellular organization and is considered pre-malignant.
6. During routine Pap smear screening, a patient is found to have cells demonstrating abnormal
size, shape, and organization. This finding is best described as:
A. Metaplasia
B. Dysplasia [CORRECT]
C. Hyperplasia
D. Hypertrophy
Rationale: Dysplasia is characterized by abnormal changes in cell size, shape, and organization
with loss of normal tissue architecture. It is considered a precursor to malignancy and is graded
based on severity (mild, moderate, severe/CIS). Unlike metaplasia (reversible cell type change),
dysplasia represents disordered development and carries malignant potential.
7. A patient suffers a myocardial infarction. The affected cardiac muscle cells undergo cell death
primarily due to:
A. Apoptosis
B. Necrosis [CORRECT]
C. Autophagy
D. Pyroptosis
, ationale: Myocardial infarction causes coagulative necrosis due to ischemia (lack of oxygen
R
interrupts oxidative metabolism and ATP generation). Necrosis is unregulated cell death with
inflammation, releasing intracellular contents that trigger inflammatory responses. The heart,
brain, and kidneys are most vulnerable to hypoxic injury due to high metabolic demands and
limited anaerobic capacity.
8. Which statement best describes the difference between apoptosis and necrosis?
A. Apoptosis involves cell swelling and membrane rupture; necrosis involves cell shrinkage and
fragmentation
B. Apoptosis is programmed cell death without inflammation; necrosis is unregulated cell death
with inflammation [CORRECT]
C. Apoptosis triggers inflammatory responses; necrosis does not trigger inflammation
D. Both processes involve identical morphological changes
Rationale: Apoptosis is programmed cell death (cell suicide) characterized by cell shrinkage,
chromatin condensation, and formation of apoptotic bodies without inflammation. It is essential
for development and tissue homeostasis. Necrosis is accidental cell death due to injury,
featuring cell swelling, membrane rupture, and release of intracellular contents causing
inflammation.
9. A patient with sickle cell disease experiences severe pain after reperfusion therapy for acute
chest syndrome. This additional tissue damage is best explained by:
A. Hypoxic injury
B. Ischemia-reperfusion injury [CORRECT]
C. Apoptosis
D. Autophagy
Rationale: Ischemia-reperfusion injury occurs when blood supply returns to previously ischemic
tissue, causing additional damage through generation of reactive oxygen species (ROS),
calcium overload, and inflammatory responses. In sickle cell disease, reperfusion can
exacerbate endothelial damage and vaso-occlusion.
10. A 38-year-old pregnant woman asks about genetic counseling. What is the most common
indication for referral?
A. Family history of cystic fibrosis
B. Maternal age over 35 [CORRECT]
C. Previous child with neural tube defect
D. Consanguineous relationship
Rationale: Advanced maternal age (>35 years) is the most common indication for genetic
counseling due to increased risk of chromosomal aneuploidies, particularly Down syndrome
(trisomy 21). While other factors (family history, previous affected child, consanguinity) are
indications, maternal age is the most frequent reason for referral.
11. A pregnant woman at 16 weeks gestation undergoes amniocentesis. The primary purpose is
to:
A. Assess fetal lung maturity
B. Perform genetic studies [CORRECT]
C. Measure alpha-fetoprotein only
D. Evaluate placental function
, ationale: Amniocentesis at 16 weeks is performed for genetic studies (karyotyping, DNA
R
analysis) to detect chromosomal abnormalities. The woman's age puts her at risk for Down
syndrome. While amniocentesis can measure AFP (for neural tube defects) later in pregnancy,
the primary purpose at 16 weeks is genetic diagnosis.
12. A newborn presents with a high-pitched cat-like cry, microcephaly, hypertelorism, hypotonia,
and low birth weight. Which genetic syndrome is most likely?
A. Down syndrome
B. Turner syndrome
C. Cri du chat syndrome [CORRECT]
D. Klinefelter syndrome
Rationale: Cri du chat syndrome (5p- syndrome) is characterized by a high-pitched cat-like cry
(distinctive feature), microcephaly, hypertelorism (widely spaced eyes), hypotonia, and low birth
weight. It results from deletion of the short arm of chromosome 5. The cat-like cry is
pathognomonic and typically diminishes after infancy.
13. A patient with Turner syndrome would most likely have which chromosomal finding?
A. Trisomy 21
B. Monosomy X (45,X) [CORRECT]
C. 47,XXY
D. Trisomy 18
Rationale: Turner syndrome occurs in approximately 45% of persons with monosomy X (each
cell has only one X chromosome; 45,X). Other cases involve mosaicism or structural
abnormalities of the X chromosome. Features include short stature, webbed neck, primary
amenorrhea, and streak ovaries due to gonadal dysgenesis.
14. A child with Down syndrome frequently presents with recurrent respiratory tract infections.
This is primarily due to:
A. T-cell deficiency
B. B-cell deficiency
C. Associated congenital heart defects and immune dysfunction [CORRECT]
D. Neutrophil disorder
Rationale: Down syndrome (trisomy 21) is associated with recurrent respiratory tract infections
due to a combination of factors: congenital heart defects (increasing pulmonary blood flow),
anatomical abnormalities (small ear canals, midface hypoplasia), and immune dysfunction
(impaired T-cell function, reduced immunoglobulin levels). Atlantoaxial instability is another
concern.
15. Which genetic marker is linked to increased risk for both breast cancer and ovarian cancer?
A. TP53
B. BRCA1 [CORRECT]
C. APC
D. RB1
Rationale: BRCA1 (and BRCA2) mutations significantly increase risk for breast, ovarian,
pancreatic, and prostate cancers. These mutations can be inherited from either parent
(autosomal dominant). BRCA1 is located on chromosome 17q21. Genetic testing is
recommended for individuals with strong family history of these cancers.
W
PATHOPHYSIOLOGY OA 2026-2027 |
Actual Questions & Detailed Answers |
Test Bank | Study Guide | Pass
Guaranteed - A+ Graded
[UNIT 1: CELLULAR ADAPTATION, INJURY & GENETICS - 75 Questions]
1. A 68-year-old male with chronic obstructive pulmonary disease (COPD) presents with
decreased muscle mass in his quadriceps. The nurse practitioner identifies this as atrophy.
What is the primary pathophysiological mechanism?
A. Increased protein synthesis leading to cellular enlargement
B. Decrease in cell size due to reduced workload, denervation, ischemia, or malnutrition
[CORRECT]
C. Replacement of one differentiated cell type with another
D. Abnormal changes in cell size, shape, and organization
Rationale: Atrophy is defined as a decrease in cell size. In this patient, reduced physical activity
due to COPD leads to decreased workload on the quadriceps muscles, resulting in protein
degradation exceeding synthesis. Denervation, ischemia, and malnutrition are other common
causes. Option A describes hypertrophy, C describes metaplasia, and D describes dysplasia.
2. A patient with long-standing hypertension is found to have left ventricular enlargement on
echocardiogram. The pathophysiology involves which cellular adaptation?
A. Hyperplasia
B. Hypertrophy [CORRECT]
C. Metaplasia
D. Dysplasia
Rationale: Hypertrophy is an increase in cell SIZE (not number) due to increased workload. The
left ventricle hypertrophies in response to chronic pressure overload from hypertension.
Angiotensin II is intimately associated with the pathogenesis of cardiac hypertrophy and heart
failure by increasing cardiovascular mechanical load. This differs from hyperplasia (increase in
cell number), metaplasia (cell type replacement), and dysplasia (disordered growth).
3. Which hormone is most intimately associated with the pathogenesis of cardiac hypertrophy
and heart failure in a patient with chronic hypertension?
A. Aldosterone
B. Angiotensin II [CORRECT]
, . Natriuretic peptide
C
D. Endothelin
Rationale: Angiotensin II causes increased cardiovascular mechanical load that can
deleteriously affect heart function. Early myocardial response includes an increase in cardiac
Angiotensin II protein levels, which is intimately associated with pathogenesis of cardiac
hypertrophy and heart failure. While aldosterone and endothelin contribute to remodeling,
angiotensin II is the primary driver.
4. A 55-year-old male presents with urinary hesitancy and frequency. Digital rectal exam reveals
an enlarged prostate gland. This enlargement represents which cellular adaptation?
A. Hypertrophy
B. Hyperplasia [CORRECT]
C. Metaplasia
D. Anaplasia
Rationale: Benign prostatic hyperplasia (BPH) involves an increase in cell NUMBER
(hyperplasia) due to hormonal stimulation (dihydrotestosterone) and aging. The prostate gland
enlarges due to both hyperplasia and hypertrophy of glandular and stromal elements, but the
primary pathological process is hyperplasia. This is a non-neoplastic, reversible process.
5. A patient with chronic gastroesophageal reflux disease (GERD) undergoes endoscopy,
revealing columnar epithelium in the distal esophagus. This finding represents:
A. Dysplasia
B. Metaplasia [CORRECT]
C. Hyperplasia
D. Hypertrophy
Rationale: Barrett esophagus is the classic example of metaplasia—replacement of one
differentiated cell type (squamous epithelium) with another (columnar epithelium) due to chronic
irritation from acid reflux. This is a protective adaptation but increases risk for adenocarcinoma.
Dysplasia would show abnormal cellular organization and is considered pre-malignant.
6. During routine Pap smear screening, a patient is found to have cells demonstrating abnormal
size, shape, and organization. This finding is best described as:
A. Metaplasia
B. Dysplasia [CORRECT]
C. Hyperplasia
D. Hypertrophy
Rationale: Dysplasia is characterized by abnormal changes in cell size, shape, and organization
with loss of normal tissue architecture. It is considered a precursor to malignancy and is graded
based on severity (mild, moderate, severe/CIS). Unlike metaplasia (reversible cell type change),
dysplasia represents disordered development and carries malignant potential.
7. A patient suffers a myocardial infarction. The affected cardiac muscle cells undergo cell death
primarily due to:
A. Apoptosis
B. Necrosis [CORRECT]
C. Autophagy
D. Pyroptosis
, ationale: Myocardial infarction causes coagulative necrosis due to ischemia (lack of oxygen
R
interrupts oxidative metabolism and ATP generation). Necrosis is unregulated cell death with
inflammation, releasing intracellular contents that trigger inflammatory responses. The heart,
brain, and kidneys are most vulnerable to hypoxic injury due to high metabolic demands and
limited anaerobic capacity.
8. Which statement best describes the difference between apoptosis and necrosis?
A. Apoptosis involves cell swelling and membrane rupture; necrosis involves cell shrinkage and
fragmentation
B. Apoptosis is programmed cell death without inflammation; necrosis is unregulated cell death
with inflammation [CORRECT]
C. Apoptosis triggers inflammatory responses; necrosis does not trigger inflammation
D. Both processes involve identical morphological changes
Rationale: Apoptosis is programmed cell death (cell suicide) characterized by cell shrinkage,
chromatin condensation, and formation of apoptotic bodies without inflammation. It is essential
for development and tissue homeostasis. Necrosis is accidental cell death due to injury,
featuring cell swelling, membrane rupture, and release of intracellular contents causing
inflammation.
9. A patient with sickle cell disease experiences severe pain after reperfusion therapy for acute
chest syndrome. This additional tissue damage is best explained by:
A. Hypoxic injury
B. Ischemia-reperfusion injury [CORRECT]
C. Apoptosis
D. Autophagy
Rationale: Ischemia-reperfusion injury occurs when blood supply returns to previously ischemic
tissue, causing additional damage through generation of reactive oxygen species (ROS),
calcium overload, and inflammatory responses. In sickle cell disease, reperfusion can
exacerbate endothelial damage and vaso-occlusion.
10. A 38-year-old pregnant woman asks about genetic counseling. What is the most common
indication for referral?
A. Family history of cystic fibrosis
B. Maternal age over 35 [CORRECT]
C. Previous child with neural tube defect
D. Consanguineous relationship
Rationale: Advanced maternal age (>35 years) is the most common indication for genetic
counseling due to increased risk of chromosomal aneuploidies, particularly Down syndrome
(trisomy 21). While other factors (family history, previous affected child, consanguinity) are
indications, maternal age is the most frequent reason for referral.
11. A pregnant woman at 16 weeks gestation undergoes amniocentesis. The primary purpose is
to:
A. Assess fetal lung maturity
B. Perform genetic studies [CORRECT]
C. Measure alpha-fetoprotein only
D. Evaluate placental function
, ationale: Amniocentesis at 16 weeks is performed for genetic studies (karyotyping, DNA
R
analysis) to detect chromosomal abnormalities. The woman's age puts her at risk for Down
syndrome. While amniocentesis can measure AFP (for neural tube defects) later in pregnancy,
the primary purpose at 16 weeks is genetic diagnosis.
12. A newborn presents with a high-pitched cat-like cry, microcephaly, hypertelorism, hypotonia,
and low birth weight. Which genetic syndrome is most likely?
A. Down syndrome
B. Turner syndrome
C. Cri du chat syndrome [CORRECT]
D. Klinefelter syndrome
Rationale: Cri du chat syndrome (5p- syndrome) is characterized by a high-pitched cat-like cry
(distinctive feature), microcephaly, hypertelorism (widely spaced eyes), hypotonia, and low birth
weight. It results from deletion of the short arm of chromosome 5. The cat-like cry is
pathognomonic and typically diminishes after infancy.
13. A patient with Turner syndrome would most likely have which chromosomal finding?
A. Trisomy 21
B. Monosomy X (45,X) [CORRECT]
C. 47,XXY
D. Trisomy 18
Rationale: Turner syndrome occurs in approximately 45% of persons with monosomy X (each
cell has only one X chromosome; 45,X). Other cases involve mosaicism or structural
abnormalities of the X chromosome. Features include short stature, webbed neck, primary
amenorrhea, and streak ovaries due to gonadal dysgenesis.
14. A child with Down syndrome frequently presents with recurrent respiratory tract infections.
This is primarily due to:
A. T-cell deficiency
B. B-cell deficiency
C. Associated congenital heart defects and immune dysfunction [CORRECT]
D. Neutrophil disorder
Rationale: Down syndrome (trisomy 21) is associated with recurrent respiratory tract infections
due to a combination of factors: congenital heart defects (increasing pulmonary blood flow),
anatomical abnormalities (small ear canals, midface hypoplasia), and immune dysfunction
(impaired T-cell function, reduced immunoglobulin levels). Atlantoaxial instability is another
concern.
15. Which genetic marker is linked to increased risk for both breast cancer and ovarian cancer?
A. TP53
B. BRCA1 [CORRECT]
C. APC
D. RB1
Rationale: BRCA1 (and BRCA2) mutations significantly increase risk for breast, ovarian,
pancreatic, and prostate cancers. These mutations can be inherited from either parent
(autosomal dominant). BRCA1 is located on chromosome 17q21. Genetic testing is
recommended for individuals with strong family history of these cancers.
