NR507 ADVANCED
PATHOPHYSIOLOGY EXAM 3
COMPREHENSIVE PRACTICE
QUESTIONS AND VERIFIED ANSWERS|
100% CORRECT |GRADE A –
CHAMBERLAIN
1. Which mechanism is primarily responsible for the development of nephrotic syndrome in
patients with glomerular disease?
A. Reduced hydrostatic pressure in the glomerular capillaries
B. Excessive production of albumin by the liver
C. Increased permeability of the glomerular filtration barrier to proteins
D. Obstruction of the proximal convoluted tubule
Answer: C
Conceptual Explanation: Nephrotic syndrome is characterized by massive proteinuria,
which occurs due to increased permeability of the glomerular filtration barrier (specifically
the podocytes and basement membrane) to plasma proteins.
2. In the syndrome of inappropriate antidiuretic hormone (SIADH), which electrolyte
imbalance is most commonly observed?
A. Hyperkalemia
,B. Hypocalcemia
C. Hyponatremia
D. Hypernatremia
Answer: C
Conceptual Explanation: SIADH involves excessive release of ADH, leading to water
retention and dilutional hyponatremia.
3. A patient with Graves’ disease presents with ophthalmopathy. What is the underlying
pathophysiology of this condition?
A. Deposition of calcium in the extraocular muscles
B. Direct toxic effects of excessive thyroxine on the optic nerve
C. Autoimmune-mediated inflammation and accumulation of glycosaminoglycans in the
orbit
D. Sympathetic nervous system overactivity leading to muscle atrophy
Answer: C
Conceptual Explanation: Graves’ ophthalmopathy is caused by autoimmune activation of
orbital fibroblasts, leading to inflammation and the accumulation of glycosaminoglycans
(like hyaluronic acid) behind the eyes.
, 4. Which hormone is primarily responsible for stimulating the production of red blood cells in
response to hypoxia?
A. Erythropoietin
B. Renin
C. Aldosterone
D. Calcitriol
Answer: A
Conceptual Explanation: Erythropoietin (EPO) is produced primarily by the peritubular
fibroblasts in the renal cortex in response to low oxygen levels to stimulate erythropoiesis.
5. What is the primary cause of hepatic encephalopathy in patients with end-stage liver
disease?
A. Decreased levels of serum albumin
B. Increased levels of conjugated bilirubin
C. Excessive production of glucose by the liver
D. Accumulation of ammonia in the blood due to impaired urea cycle
Answer: D
Conceptual Explanation: Hepatic encephalopathy results from the liver’s inability to
convert ammonia (a byproduct of protein metabolism) into urea, leading to neurotoxic
levels of ammonia crossing the blood-brain barrier.
PATHOPHYSIOLOGY EXAM 3
COMPREHENSIVE PRACTICE
QUESTIONS AND VERIFIED ANSWERS|
100% CORRECT |GRADE A –
CHAMBERLAIN
1. Which mechanism is primarily responsible for the development of nephrotic syndrome in
patients with glomerular disease?
A. Reduced hydrostatic pressure in the glomerular capillaries
B. Excessive production of albumin by the liver
C. Increased permeability of the glomerular filtration barrier to proteins
D. Obstruction of the proximal convoluted tubule
Answer: C
Conceptual Explanation: Nephrotic syndrome is characterized by massive proteinuria,
which occurs due to increased permeability of the glomerular filtration barrier (specifically
the podocytes and basement membrane) to plasma proteins.
2. In the syndrome of inappropriate antidiuretic hormone (SIADH), which electrolyte
imbalance is most commonly observed?
A. Hyperkalemia
,B. Hypocalcemia
C. Hyponatremia
D. Hypernatremia
Answer: C
Conceptual Explanation: SIADH involves excessive release of ADH, leading to water
retention and dilutional hyponatremia.
3. A patient with Graves’ disease presents with ophthalmopathy. What is the underlying
pathophysiology of this condition?
A. Deposition of calcium in the extraocular muscles
B. Direct toxic effects of excessive thyroxine on the optic nerve
C. Autoimmune-mediated inflammation and accumulation of glycosaminoglycans in the
orbit
D. Sympathetic nervous system overactivity leading to muscle atrophy
Answer: C
Conceptual Explanation: Graves’ ophthalmopathy is caused by autoimmune activation of
orbital fibroblasts, leading to inflammation and the accumulation of glycosaminoglycans
(like hyaluronic acid) behind the eyes.
, 4. Which hormone is primarily responsible for stimulating the production of red blood cells in
response to hypoxia?
A. Erythropoietin
B. Renin
C. Aldosterone
D. Calcitriol
Answer: A
Conceptual Explanation: Erythropoietin (EPO) is produced primarily by the peritubular
fibroblasts in the renal cortex in response to low oxygen levels to stimulate erythropoiesis.
5. What is the primary cause of hepatic encephalopathy in patients with end-stage liver
disease?
A. Decreased levels of serum albumin
B. Increased levels of conjugated bilirubin
C. Excessive production of glucose by the liver
D. Accumulation of ammonia in the blood due to impaired urea cycle
Answer: D
Conceptual Explanation: Hepatic encephalopathy results from the liver’s inability to
convert ammonia (a byproduct of protein metabolism) into urea, leading to neurotoxic
levels of ammonia crossing the blood-brain barrier.
