NR507 Advanced Pathophysiology
midterm exam Practice questions with
answers/ NR 507 Advanced
Pathophysiology Week 4 Practice Test
NR507 Advanced Pathophysiology Midterm Exam
Practice Questions
Section I: Cellular Pathophysiology (Questions 1-20)
1. A patient with chronic alcoholism develops Wernicke-Korsakoff syndrome. This
condition results from a deficiency of which vitamin that is essential for cellular
metabolism?
A) Vitamin B12
B) Vitamin C
C) Thiamine (Vitamin B1)
D) Vitamin D
Rationale: C) Thiamine (Vitamin B1) is correct because thiamine deficiency leads to
impaired glucose metabolism and ATP production, particularly affecting neuronal cells.
Wernicke-Korsakoff syndrome manifests with ophthalmoplegia, ataxia, and confusion.
Thiamine is a cofactor for several enzymes in the Krebs cycle including pyruvate
dehydrogenase, alpha-ketoglutarate dehydrogenase, and transketolase.
,2. A 45-year-old patient with type 2 diabetes mellitus presents with peripheral
neuropathy. The nurse understands that this complication results from:
A) Decreased insulin production only
B) Hyperglycemia-induced oxidative stress and advanced glycation end-products
(AGEs)
C) Autoimmune destruction of pancreatic beta cells
D) Increased production of glucagon
Rationale: B) Hyperglycemia-induced oxidative stress and advanced glycation end-
products (AGEs) is correct because chronic hyperglycemia leads to the formation of
AGEs, increased polyol pathway flux, and oxidative stress, all contributing to neuronal
damage. This is a microvascular complication of diabetes affecting peripheral nerves.
3. Which cellular adaptation is characterized by a decrease in cell size and
metabolic activity in response to reduced workload or nutrient supply?
A) Hyperplasia
B) Hypertrophy
C) Atrophy
D) Metaplasia
Rationale: C) Atrophy is correct because it represents a decrease in cell size due to
reduced protein synthesis and increased protein degradation via the ubiquitin-
proteasome pathway. This adaptation occurs in response to decreased workload,
denervation, ischemia, or malnutrition.
,4. A 60-year-old patient with a 40-pack-year smoking history develops a
squamous cell carcinoma of the lung. The cellular change that predisposed this
patient to cancer is:
A) Dysplasia
B) Metaplasia
C) Anaplasia
D) Hyperplasia
Rationale: B) Metaplasia is correct because chronic irritation from cigarette smoke
causes squamous metaplasia of the normal pseudostratified columnar epithelium in the
bronchi. This metaplastic epithelium is more susceptible to dysplastic changes and
malignant transformation. Squamous cell carcinoma arises from this metaplastic
epithelium.
5. A patient experiencing ischemia-reperfusion injury demonstrates cellular
damage primarily caused by:
A) Increased ATP production
B) Decreased intracellular calcium
C) Formation of reactive oxygen species (ROS)
D) Decreased mitochondrial permeability
Rationale: C) Formation of reactive oxygen species (ROS) is correct because during
reperfusion, molecular oxygen reintroduction leads to rapid ROS generation through
multiple mechanisms including xanthine oxidase activation, mitochondrial dysfunction,
and neutrophil activation. ROS cause lipid peroxidation, protein oxidation, and DNA
damage.
, 6. A 58-year-old patient with chronic obstructive pulmonary disease (COPD)
demonstrates which type of acid-base imbalance?
A) Metabolic acidosis
B) Metabolic alkalosis
C) Respiratory acidosis
D) Respiratory alkalosis
Rationale: C) Respiratory acidosis is correct because COPD results in chronic carbon
dioxide retention (hypercapnia) due to impaired alveolar ventilation. The primary
disturbance is increased PaCO2 leading to decreased pH. The kidneys compensate by
retaining bicarbonate.
7. Which electrolyte imbalance is most likely to cause cardiac arrhythmias and
muscle weakness in a patient with chronic diarrhea?
A) Hyperkalemia
B) Hypokalemia
C) Hypernatremia
D) Hypomagnesemia
Rationale: B) Hypokalemia is correct because chronic diarrhea leads to potassium loss
through the gastrointestinal tract. Hypokalemia causes neuronal hyperpolarization,
resulting in muscle weakness and cardiac arrhythmias due to prolonged repolarization.
ECG changes include flat T waves, U waves, and ST depression.
8. A 72-year-old patient with heart failure develops hyponatremia. The most likely
mechanism for this electrolyte disturbance is:
midterm exam Practice questions with
answers/ NR 507 Advanced
Pathophysiology Week 4 Practice Test
NR507 Advanced Pathophysiology Midterm Exam
Practice Questions
Section I: Cellular Pathophysiology (Questions 1-20)
1. A patient with chronic alcoholism develops Wernicke-Korsakoff syndrome. This
condition results from a deficiency of which vitamin that is essential for cellular
metabolism?
A) Vitamin B12
B) Vitamin C
C) Thiamine (Vitamin B1)
D) Vitamin D
Rationale: C) Thiamine (Vitamin B1) is correct because thiamine deficiency leads to
impaired glucose metabolism and ATP production, particularly affecting neuronal cells.
Wernicke-Korsakoff syndrome manifests with ophthalmoplegia, ataxia, and confusion.
Thiamine is a cofactor for several enzymes in the Krebs cycle including pyruvate
dehydrogenase, alpha-ketoglutarate dehydrogenase, and transketolase.
,2. A 45-year-old patient with type 2 diabetes mellitus presents with peripheral
neuropathy. The nurse understands that this complication results from:
A) Decreased insulin production only
B) Hyperglycemia-induced oxidative stress and advanced glycation end-products
(AGEs)
C) Autoimmune destruction of pancreatic beta cells
D) Increased production of glucagon
Rationale: B) Hyperglycemia-induced oxidative stress and advanced glycation end-
products (AGEs) is correct because chronic hyperglycemia leads to the formation of
AGEs, increased polyol pathway flux, and oxidative stress, all contributing to neuronal
damage. This is a microvascular complication of diabetes affecting peripheral nerves.
3. Which cellular adaptation is characterized by a decrease in cell size and
metabolic activity in response to reduced workload or nutrient supply?
A) Hyperplasia
B) Hypertrophy
C) Atrophy
D) Metaplasia
Rationale: C) Atrophy is correct because it represents a decrease in cell size due to
reduced protein synthesis and increased protein degradation via the ubiquitin-
proteasome pathway. This adaptation occurs in response to decreased workload,
denervation, ischemia, or malnutrition.
,4. A 60-year-old patient with a 40-pack-year smoking history develops a
squamous cell carcinoma of the lung. The cellular change that predisposed this
patient to cancer is:
A) Dysplasia
B) Metaplasia
C) Anaplasia
D) Hyperplasia
Rationale: B) Metaplasia is correct because chronic irritation from cigarette smoke
causes squamous metaplasia of the normal pseudostratified columnar epithelium in the
bronchi. This metaplastic epithelium is more susceptible to dysplastic changes and
malignant transformation. Squamous cell carcinoma arises from this metaplastic
epithelium.
5. A patient experiencing ischemia-reperfusion injury demonstrates cellular
damage primarily caused by:
A) Increased ATP production
B) Decreased intracellular calcium
C) Formation of reactive oxygen species (ROS)
D) Decreased mitochondrial permeability
Rationale: C) Formation of reactive oxygen species (ROS) is correct because during
reperfusion, molecular oxygen reintroduction leads to rapid ROS generation through
multiple mechanisms including xanthine oxidase activation, mitochondrial dysfunction,
and neutrophil activation. ROS cause lipid peroxidation, protein oxidation, and DNA
damage.
, 6. A 58-year-old patient with chronic obstructive pulmonary disease (COPD)
demonstrates which type of acid-base imbalance?
A) Metabolic acidosis
B) Metabolic alkalosis
C) Respiratory acidosis
D) Respiratory alkalosis
Rationale: C) Respiratory acidosis is correct because COPD results in chronic carbon
dioxide retention (hypercapnia) due to impaired alveolar ventilation. The primary
disturbance is increased PaCO2 leading to decreased pH. The kidneys compensate by
retaining bicarbonate.
7. Which electrolyte imbalance is most likely to cause cardiac arrhythmias and
muscle weakness in a patient with chronic diarrhea?
A) Hyperkalemia
B) Hypokalemia
C) Hypernatremia
D) Hypomagnesemia
Rationale: B) Hypokalemia is correct because chronic diarrhea leads to potassium loss
through the gastrointestinal tract. Hypokalemia causes neuronal hyperpolarization,
resulting in muscle weakness and cardiac arrhythmias due to prolonged repolarization.
ECG changes include flat T waves, U waves, and ST depression.
8. A 72-year-old patient with heart failure develops hyponatremia. The most likely
mechanism for this electrolyte disturbance is:
