NUR631 ADVANCED
PATHOPHYSIOLOGY FINAL EXAM
QUESTIONS AND ANSWERS 100%
VERIFIED BY EXPERTS. 2026/2027
1. Which mechanism is primarily responsible for the development of pulmonary edema in a
patient with left-sided heart failure?
A. Increased pulmonary capillary hydrostatic pressure
B. Decreased pulmonary capillary hydrostatic pressure
C. Increased pulmonary capillary oncotic pressure
D. Decreased capillary permeability
Answer: A
Conceptual Explanation: In left-sided heart failure, the left ventricle is unable to pump
blood efficiently, leading to a backup of blood into the pulmonary circulation. This
increases pulmonary capillary hydrostatic pressure, forcing fluid into the interstitial and
alveolar spaces.
2. A patient is diagnosed with secondary hyperparathyroidism due to chronic kidney disease
(CKD). What is the underlying cause of the increased PTH secretion?
A. Hypocalcemia and hyperphosphatemia
,B. Hypercalcemia and hyperphosphatemia
C. Hypocalcemia and hypophosphatemia
D. Increased production of Vitamin D3
Answer: A
Conceptual Explanation: CKD leads to decreased phosphate excretion
(hyperphosphatemia) and decreased activation of Vitamin D, which results in low serum
calcium (hypocalcemia). Both hypocalcemia and hyperphosphatemia stimulate the
parathyroid glands to secrete more PTH.
3. In the pathophysiology of Acute Respiratory Distress Syndrome (ARDS), what is the
consequence of surfactant inactivation?
A. Increased lung compliance
B. Enhanced gas exchange
C. Decreased surface tension in the alveoli
D. Alveolar collapse and atelectasis
Answer: D
Conceptual Explanation: Surfactant reduces surface tension to keep alveoli open. In
ARDS, damage to Type II pneumocytes and the presence of protein-rich fluid in the alveoli
inactivate surfactant, leading to increased surface tension, alveolar collapse, and
atelectasis.
, 4. Which of the following describes the pathophysiology of Myasthenia Gravis?
A. Demyelination of the central nervous system neurons
B. Autoimmune destruction of acetylcholine receptors at the neuromuscular junction
C. Degeneration of the dopamine-producing neurons in the substantia nigra
D. Destruction of upper and lower motor neurons
Answer: B
Conceptual Explanation: Myasthenia Gravis is an autoimmune disorder where IgG
antibodies block or destroy acetylcholine receptors at the postsynaptic neuromuscular
junction, leading to muscle weakness and fatigue.
5. A patient presents with high serum osmolality, low urine osmolality, and polyuria. Which
condition is most likely?
A. Diabetes Insipidus
B. SIADH
C. Hyperaldosteronism
D. Cushing’s Syndrome
Answer: A
Conceptual Explanation: Diabetes Insipidus is characterized by a deficiency of ADH
(central) or resistance to ADH (nephrogenic), leading to the inability to concentrate urine
(low urine osmolality) and resulting in high serum osmolality and excessive urination.
PATHOPHYSIOLOGY FINAL EXAM
QUESTIONS AND ANSWERS 100%
VERIFIED BY EXPERTS. 2026/2027
1. Which mechanism is primarily responsible for the development of pulmonary edema in a
patient with left-sided heart failure?
A. Increased pulmonary capillary hydrostatic pressure
B. Decreased pulmonary capillary hydrostatic pressure
C. Increased pulmonary capillary oncotic pressure
D. Decreased capillary permeability
Answer: A
Conceptual Explanation: In left-sided heart failure, the left ventricle is unable to pump
blood efficiently, leading to a backup of blood into the pulmonary circulation. This
increases pulmonary capillary hydrostatic pressure, forcing fluid into the interstitial and
alveolar spaces.
2. A patient is diagnosed with secondary hyperparathyroidism due to chronic kidney disease
(CKD). What is the underlying cause of the increased PTH secretion?
A. Hypocalcemia and hyperphosphatemia
,B. Hypercalcemia and hyperphosphatemia
C. Hypocalcemia and hypophosphatemia
D. Increased production of Vitamin D3
Answer: A
Conceptual Explanation: CKD leads to decreased phosphate excretion
(hyperphosphatemia) and decreased activation of Vitamin D, which results in low serum
calcium (hypocalcemia). Both hypocalcemia and hyperphosphatemia stimulate the
parathyroid glands to secrete more PTH.
3. In the pathophysiology of Acute Respiratory Distress Syndrome (ARDS), what is the
consequence of surfactant inactivation?
A. Increased lung compliance
B. Enhanced gas exchange
C. Decreased surface tension in the alveoli
D. Alveolar collapse and atelectasis
Answer: D
Conceptual Explanation: Surfactant reduces surface tension to keep alveoli open. In
ARDS, damage to Type II pneumocytes and the presence of protein-rich fluid in the alveoli
inactivate surfactant, leading to increased surface tension, alveolar collapse, and
atelectasis.
, 4. Which of the following describes the pathophysiology of Myasthenia Gravis?
A. Demyelination of the central nervous system neurons
B. Autoimmune destruction of acetylcholine receptors at the neuromuscular junction
C. Degeneration of the dopamine-producing neurons in the substantia nigra
D. Destruction of upper and lower motor neurons
Answer: B
Conceptual Explanation: Myasthenia Gravis is an autoimmune disorder where IgG
antibodies block or destroy acetylcholine receptors at the postsynaptic neuromuscular
junction, leading to muscle weakness and fatigue.
5. A patient presents with high serum osmolality, low urine osmolality, and polyuria. Which
condition is most likely?
A. Diabetes Insipidus
B. SIADH
C. Hyperaldosteronism
D. Cushing’s Syndrome
Answer: A
Conceptual Explanation: Diabetes Insipidus is characterized by a deficiency of ADH
(central) or resistance to ADH (nephrogenic), leading to the inability to concentrate urine
(low urine osmolality) and resulting in high serum osmolality and excessive urination.
