NUR-641E ADVANCED
PATHOPHYSIOLOGY FINAL EXAM
PREP
1. A patient presents with a serum sodium level of 120 mEq/L. Which cellular change is most
likely occurring in the brain?
A. Cellular dehydration due to water moving out of the cells
B. Apoptosis triggered by high osmotic pressure
C. Cellular atrophy due to lack of glucose uptake
D. Intracellular swelling due to water moving into the cells
Answer: D
Conceptual Explanation: Hyponatremia creates a hypotonic extracellular environment,
causing water to move into the cells via osmosis, leading to intracellular swelling and
potential cerebral edema.
2. Which mechanism best describes the development of Cardiogenic Shock following a
massive myocardial infarction?
A. Systemic vasodilation reducing peripheral resistance
B. Hypovolemia due to excessive fluid loss from diaphoresis
,C. Reduced cardiac output despite adequate intravascular volume
D. Obstruction of blood flow through the pulmonary vasculature
Answer: C
Conceptual Explanation: Cardiogenic shock is characterized by the heart’s inability to
pump sufficient blood to meet metabolic demands, resulting in low cardiac output despite
normal fluid volume.
3. In the pathophysiology of Type 1 Diabetes Mellitus, what is the primary cause of absolute
insulin deficiency?
A. Downregulation of insulin receptors in peripheral tissues
B. Hypertrophy of the Islets of Langerhans
C. Excessive secretion of glucagon by alpha cells
D. Autoimmune destruction of pancreatic beta cells
Answer: D
Conceptual Explanation: Type 1 Diabetes involves a T-cell mediated autoimmune attack
that destroys insulin-producing beta cells in the pancreas, leading to absolute deficiency.
4. A patient has a pH of 7.25, PaCO2 of 55 mmHg, and HCO3- of 26 mEq/L. Which acid-base
imbalance is present?
A. Metabolic Acidosis
B. Respiratory Acidosis
, C. Respiratory Alkalosis
D. Metabolic Alkalosis
Answer: B
Conceptual Explanation: A pH below 7.35 indicates acidosis, and a PaCO2 above 45
mmHg indicates a respiratory origin, confirming respiratory acidosis.
5. Which of the following is a characteristic of malignant tumors that distinguishes them from
benign tumors?
A. Ability to metastasize to distant organs
B. Slow growth rate
C. Presence of a fibrous capsule
D. Well-differentiated cell structure
Answer: A
Conceptual Explanation: Malignant tumors are characterized by lack of differentiation
(anaplasia), rapid growth, and the ability to invade surrounding tissues and metastasize.
6. What is the primary pathophysiology behind Multiple Sclerosis (MS)?
A. Depletion of dopamine in the basal ganglia
B. Autoimmune-mediated demyelination of the central nervous system
C. Accumulation of amyloid-beta plaques in the cerebral cortex
PATHOPHYSIOLOGY FINAL EXAM
PREP
1. A patient presents with a serum sodium level of 120 mEq/L. Which cellular change is most
likely occurring in the brain?
A. Cellular dehydration due to water moving out of the cells
B. Apoptosis triggered by high osmotic pressure
C. Cellular atrophy due to lack of glucose uptake
D. Intracellular swelling due to water moving into the cells
Answer: D
Conceptual Explanation: Hyponatremia creates a hypotonic extracellular environment,
causing water to move into the cells via osmosis, leading to intracellular swelling and
potential cerebral edema.
2. Which mechanism best describes the development of Cardiogenic Shock following a
massive myocardial infarction?
A. Systemic vasodilation reducing peripheral resistance
B. Hypovolemia due to excessive fluid loss from diaphoresis
,C. Reduced cardiac output despite adequate intravascular volume
D. Obstruction of blood flow through the pulmonary vasculature
Answer: C
Conceptual Explanation: Cardiogenic shock is characterized by the heart’s inability to
pump sufficient blood to meet metabolic demands, resulting in low cardiac output despite
normal fluid volume.
3. In the pathophysiology of Type 1 Diabetes Mellitus, what is the primary cause of absolute
insulin deficiency?
A. Downregulation of insulin receptors in peripheral tissues
B. Hypertrophy of the Islets of Langerhans
C. Excessive secretion of glucagon by alpha cells
D. Autoimmune destruction of pancreatic beta cells
Answer: D
Conceptual Explanation: Type 1 Diabetes involves a T-cell mediated autoimmune attack
that destroys insulin-producing beta cells in the pancreas, leading to absolute deficiency.
4. A patient has a pH of 7.25, PaCO2 of 55 mmHg, and HCO3- of 26 mEq/L. Which acid-base
imbalance is present?
A. Metabolic Acidosis
B. Respiratory Acidosis
, C. Respiratory Alkalosis
D. Metabolic Alkalosis
Answer: B
Conceptual Explanation: A pH below 7.35 indicates acidosis, and a PaCO2 above 45
mmHg indicates a respiratory origin, confirming respiratory acidosis.
5. Which of the following is a characteristic of malignant tumors that distinguishes them from
benign tumors?
A. Ability to metastasize to distant organs
B. Slow growth rate
C. Presence of a fibrous capsule
D. Well-differentiated cell structure
Answer: A
Conceptual Explanation: Malignant tumors are characterized by lack of differentiation
(anaplasia), rapid growth, and the ability to invade surrounding tissues and metastasize.
6. What is the primary pathophysiology behind Multiple Sclerosis (MS)?
A. Depletion of dopamine in the basal ganglia
B. Autoimmune-mediated demyelination of the central nervous system
C. Accumulation of amyloid-beta plaques in the cerebral cortex
