NR507 ADVANCED
PATHOPHYSIOLOGY EXAM 4: RENAL,
ENDOCRINE, AND
MUSCULOSKELETAL SYSTEMS
QUESTIONS AND VERIFIED ANSWERS |
100% CORRECT | GRADE A+
1. Which of the following findings is the hallmark of nephrotic syndrome that distinguishes it
from nephritic syndrome?
A. Gross hematuria with red blood cell casts
B. Hypertension due to fluid retention
C. Elevated serum creatinine and blood urea nitrogen
D. Excretion of more than 3.5 grams of protein in the urine per day
Answer: D
Conceptual Explanation: Nephrotic syndrome is characterized by massive proteinuria
(>3.5g/day) due to glomerular damage, leading to hypoalbuminemia and edema.
Hematuria is more characteristic of nephritic syndrome.
2. In prerenal acute kidney injury (AKI), what is the primary underlying mechanism of
decreased GFR?
A. Obstruction of the urinary outflow tract
,B. Decreased renal perfusion pressure
C. Direct damage to the renal tubular epithelium
D. Inflammation of the glomerular capillaries
Answer: B
Conceptual Explanation: Prerenal AKI is caused by conditions that impair renal blood
flow (hypoperfusion), such as hypovolemia or hypotension, without initial damage to the
kidney parenchyma itself.
3. Which clinical manifestation is most characteristic of Graves disease?
A. Ophthalmopathy (exophthalmos) and pretibial myxedema
B. Weight gain and cold intolerance
C. Bradycardia and delayed tendon reflexes
D. Hypotension and hyperkalemia
Answer: A
Conceptual Explanation: Graves disease is an autoimmune form of hyperthyroidism
where thyroid-stimulating immunoglobulins (TSI) stimulate the TSH receptor, leading to
exophthalmos and skin changes (pretibial myxedema) not seen in other forms of
hyperthyroidism.
, 4. Polycystic Ovary Syndrome (PCOS) is frequently associated with which metabolic
derangement?
A. Insulin resistance and hyperinsulinemia
B. Low serum androgen levels
C. Decreased luteinizing hormone (LH) secretion
D. Increased insulin sensitivity
Answer: A
Conceptual Explanation: PCOS involves a vicious cycle of hyperandrogenism and insulin
resistance. Hyperinsulinemia stimulates androgen secretion from the ovaries and
decreases sex hormone-binding globulin.
5. What is the primary pathological change in osteoarthritis?
A. Systemic autoimmune inflammation of the synovium
B. Loss of articular cartilage and formation of osteophytes
C. Urate crystal deposition in the joint space
D. Bacterial infection within the synovial fluid
Answer: B
Conceptual Explanation: Osteoarthritis is a degenerative joint disease characterized by
the mechanical degradation of articular cartilage, thickening of subchondral bone, and new
bone formation at the joint margins (osteophytes).
PATHOPHYSIOLOGY EXAM 4: RENAL,
ENDOCRINE, AND
MUSCULOSKELETAL SYSTEMS
QUESTIONS AND VERIFIED ANSWERS |
100% CORRECT | GRADE A+
1. Which of the following findings is the hallmark of nephrotic syndrome that distinguishes it
from nephritic syndrome?
A. Gross hematuria with red blood cell casts
B. Hypertension due to fluid retention
C. Elevated serum creatinine and blood urea nitrogen
D. Excretion of more than 3.5 grams of protein in the urine per day
Answer: D
Conceptual Explanation: Nephrotic syndrome is characterized by massive proteinuria
(>3.5g/day) due to glomerular damage, leading to hypoalbuminemia and edema.
Hematuria is more characteristic of nephritic syndrome.
2. In prerenal acute kidney injury (AKI), what is the primary underlying mechanism of
decreased GFR?
A. Obstruction of the urinary outflow tract
,B. Decreased renal perfusion pressure
C. Direct damage to the renal tubular epithelium
D. Inflammation of the glomerular capillaries
Answer: B
Conceptual Explanation: Prerenal AKI is caused by conditions that impair renal blood
flow (hypoperfusion), such as hypovolemia or hypotension, without initial damage to the
kidney parenchyma itself.
3. Which clinical manifestation is most characteristic of Graves disease?
A. Ophthalmopathy (exophthalmos) and pretibial myxedema
B. Weight gain and cold intolerance
C. Bradycardia and delayed tendon reflexes
D. Hypotension and hyperkalemia
Answer: A
Conceptual Explanation: Graves disease is an autoimmune form of hyperthyroidism
where thyroid-stimulating immunoglobulins (TSI) stimulate the TSH receptor, leading to
exophthalmos and skin changes (pretibial myxedema) not seen in other forms of
hyperthyroidism.
, 4. Polycystic Ovary Syndrome (PCOS) is frequently associated with which metabolic
derangement?
A. Insulin resistance and hyperinsulinemia
B. Low serum androgen levels
C. Decreased luteinizing hormone (LH) secretion
D. Increased insulin sensitivity
Answer: A
Conceptual Explanation: PCOS involves a vicious cycle of hyperandrogenism and insulin
resistance. Hyperinsulinemia stimulates androgen secretion from the ovaries and
decreases sex hormone-binding globulin.
5. What is the primary pathological change in osteoarthritis?
A. Systemic autoimmune inflammation of the synovium
B. Loss of articular cartilage and formation of osteophytes
C. Urate crystal deposition in the joint space
D. Bacterial infection within the synovial fluid
Answer: B
Conceptual Explanation: Osteoarthritis is a degenerative joint disease characterized by
the mechanical degradation of articular cartilage, thickening of subchondral bone, and new
bone formation at the joint margins (osteophytes).
