NR507 ADVANCED
PATHOPHYSIOLOGY FINAL EXAM
QUESTIONS AND ANSWERS
1. Which mechanism is primarily responsible for the development of pulmonary edema in a
patient with left-sided heart failure?
A. Decreased capillary oncotic pressure
B. Lymphatic obstruction
C. Increased capillary permeability
D. Increased pulmonary capillary hydrostatic pressure
Answer: D
Conceptual Explanation: In left-sided heart failure, the left ventricle fails to pump
efficiently, leading to a backup of blood into the left atrium and pulmonary veins. This
increases pulmonary capillary hydrostatic pressure, forcing fluid into the interstitial and
alveolar spaces.
,2. In the pathogenesis of COPD, the protease-antiprotease imbalance leads to which of the
following?
A. Destruction of alveolar walls and loss of elastic recoil
B. Excessive mucus production
C. Hypertrophy of bronchial smooth muscle
D. Fibrosis of the distal airways
Answer: A
Conceptual Explanation: The protease-antiprotease imbalance, often caused by cigarette
smoke, results in the breakdown of elastin in the alveolar walls by proteases like elastase,
which is not neutralized by alpha-1 antitrypsin, leading to emphysema.
3. What is the hallmark physiological finding in patients with Nephrotic Syndrome?
A. Hematuria exceeding 5g/day
B. Reduced glomerular filtration rate with azotemia
C. Proteinuria exceeding 3.5g/day
D. Elevated serum albumin levels
Answer: C
Conceptual Explanation: Nephrotic syndrome is characterized by massive proteinuria
(usually >3.5g/day) due to glomerular injury, which leads to hypoalbuminemia, edema, and
hyperlipidemia.
, 4. Which autoantibody is specifically associated with Graves’ disease?
A. Thyroid-stimulating immunoglobulin (TSI)
B. Anti-thyroid peroxidase (TPO) antibody
C. Anti-thyroglobulin antibody
D. Anti-nuclear antibody (ANA)
Answer: A
Conceptual Explanation: Graves’ disease is caused by Thyroid-stimulating
immunoglobulins (TSI) that bind to and activate the TSH receptor, leading to excessive
thyroid hormone production.
5. In Myasthenia Gravis, the neuromuscular transmission is impaired because:
A. Dopamine receptors are blocked in the basal ganglia
B. Acetylcholine release is inhibited at the presynaptic membrane
C. Autoantibodies destroy or block acetylcholine receptors at the postsynaptic membrane
D. Myelin sheaths in the peripheral nerves are destroyed
Answer: C
Conceptual Explanation: Myasthenia Gravis is an autoimmune disorder where IgG
antibodies are produced against acetylcholine receptors at the postsynaptic junction,
causing muscle weakness.
PATHOPHYSIOLOGY FINAL EXAM
QUESTIONS AND ANSWERS
1. Which mechanism is primarily responsible for the development of pulmonary edema in a
patient with left-sided heart failure?
A. Decreased capillary oncotic pressure
B. Lymphatic obstruction
C. Increased capillary permeability
D. Increased pulmonary capillary hydrostatic pressure
Answer: D
Conceptual Explanation: In left-sided heart failure, the left ventricle fails to pump
efficiently, leading to a backup of blood into the left atrium and pulmonary veins. This
increases pulmonary capillary hydrostatic pressure, forcing fluid into the interstitial and
alveolar spaces.
,2. In the pathogenesis of COPD, the protease-antiprotease imbalance leads to which of the
following?
A. Destruction of alveolar walls and loss of elastic recoil
B. Excessive mucus production
C. Hypertrophy of bronchial smooth muscle
D. Fibrosis of the distal airways
Answer: A
Conceptual Explanation: The protease-antiprotease imbalance, often caused by cigarette
smoke, results in the breakdown of elastin in the alveolar walls by proteases like elastase,
which is not neutralized by alpha-1 antitrypsin, leading to emphysema.
3. What is the hallmark physiological finding in patients with Nephrotic Syndrome?
A. Hematuria exceeding 5g/day
B. Reduced glomerular filtration rate with azotemia
C. Proteinuria exceeding 3.5g/day
D. Elevated serum albumin levels
Answer: C
Conceptual Explanation: Nephrotic syndrome is characterized by massive proteinuria
(usually >3.5g/day) due to glomerular injury, which leads to hypoalbuminemia, edema, and
hyperlipidemia.
, 4. Which autoantibody is specifically associated with Graves’ disease?
A. Thyroid-stimulating immunoglobulin (TSI)
B. Anti-thyroid peroxidase (TPO) antibody
C. Anti-thyroglobulin antibody
D. Anti-nuclear antibody (ANA)
Answer: A
Conceptual Explanation: Graves’ disease is caused by Thyroid-stimulating
immunoglobulins (TSI) that bind to and activate the TSH receptor, leading to excessive
thyroid hormone production.
5. In Myasthenia Gravis, the neuromuscular transmission is impaired because:
A. Dopamine receptors are blocked in the basal ganglia
B. Acetylcholine release is inhibited at the presynaptic membrane
C. Autoantibodies destroy or block acetylcholine receptors at the postsynaptic membrane
D. Myelin sheaths in the peripheral nerves are destroyed
Answer: C
Conceptual Explanation: Myasthenia Gravis is an autoimmune disorder where IgG
antibodies are produced against acetylcholine receptors at the postsynaptic junction,
causing muscle weakness.
