NSG530 Exam 4 V1 | NSG 530 Advanced
Pathophysiology | Wilkes University
1. A patient with acute kidney injury (AKI) is found to have decreased blood flow to the
kidneys due to severe dehydration. How is this AKI categorized?
A. Intrarenal
B. Postrenal
C. Intrinsic
D. Prerenal
Answer: D
Rationale: Prerenal AKI is caused by factors that reduce systemic blood flow, leading to
decreased renal perfusion. In this scenario, dehydration results in hypovolemia, which
lowers the glomerular filtration rate. It is the most common form of AKI and is typically
reversible if the underlying cause is addressed promptly.
2. Which clinical finding is most characteristic of nephrotic syndrome?
A. Gross hematuria
B. Proteinuria exceeding 3.5 g/day
C. Hypokalemia
D. Normal serum albumin
,Answer: B
Rationale: Nephrotic syndrome involves significant damage to the glomerular filtration
barrier, allowing large amounts of protein to escape into the urine. This loss of albumin
leads to a decrease in plasma oncotic pressure, resulting in generalized edema. Other
classic signs include hypoalbuminemia and hyperlipidemia.
3. What is the primary pathological mechanism of Rheumatoid Arthritis (RA)?
A. Degeneration of articular cartilage due to wear and tear
B. Bacterial infection of the joint capsule
C. Uric acid crystal deposition in the joint space
D. Autoimmune-mediated destruction of the synovial membrane
Answer: D
Rationale: Rheumatoid Arthritis is a chronic autoimmune disorder characterized by the
inflammation of the synovium. The body’s immune system attacks the synovial membrane,
leading to the formation of a pannus that destroys cartilage and bone. This distinguishes it
from osteoarthritis, which is primarily a degenerative condition.
4. In the pathophysiology of osteoporosis, which molecule binds to RANK receptors to
stimulate osteoclast activity?
A. Osteoprotegerin (OPG)
B. Calcitonin
, C. Vitamin D
D. RANKL
Answer: D
Rationale: RANKL (Receptor Activator of Nuclear Factor kappa-B Ligand) is essential for
the differentiation and activation of osteoclasts. When RANKL binds to its receptor RANK
on osteoclast precursors, it triggers bone resorption. Osteoporosis occurs when the balance
between RANKL and its decoy receptor OPG is disrupted, often due to estrogen deficiency.
5. Polycystic Ovary Syndrome (PCOS) is frequently associated with which metabolic
abnormality?
A. Insulin resistance and hyperinsulinemia
B. Increased insulin sensitivity
C. Hypogonadotropic hypogonadism
D. Primary adrenal insufficiency
Answer: A
Rationale: Insulin resistance plays a central role in the pathogenesis of PCOS by
stimulating the ovaries to produce excess androgens. This hyperinsulinemia also reduces
the production of sex hormone-binding globulin, further increasing free testosterone levels.
Consequently, patients often experience ovulatory dysfunction and metabolic syndrome.
Pathophysiology | Wilkes University
1. A patient with acute kidney injury (AKI) is found to have decreased blood flow to the
kidneys due to severe dehydration. How is this AKI categorized?
A. Intrarenal
B. Postrenal
C. Intrinsic
D. Prerenal
Answer: D
Rationale: Prerenal AKI is caused by factors that reduce systemic blood flow, leading to
decreased renal perfusion. In this scenario, dehydration results in hypovolemia, which
lowers the glomerular filtration rate. It is the most common form of AKI and is typically
reversible if the underlying cause is addressed promptly.
2. Which clinical finding is most characteristic of nephrotic syndrome?
A. Gross hematuria
B. Proteinuria exceeding 3.5 g/day
C. Hypokalemia
D. Normal serum albumin
,Answer: B
Rationale: Nephrotic syndrome involves significant damage to the glomerular filtration
barrier, allowing large amounts of protein to escape into the urine. This loss of albumin
leads to a decrease in plasma oncotic pressure, resulting in generalized edema. Other
classic signs include hypoalbuminemia and hyperlipidemia.
3. What is the primary pathological mechanism of Rheumatoid Arthritis (RA)?
A. Degeneration of articular cartilage due to wear and tear
B. Bacterial infection of the joint capsule
C. Uric acid crystal deposition in the joint space
D. Autoimmune-mediated destruction of the synovial membrane
Answer: D
Rationale: Rheumatoid Arthritis is a chronic autoimmune disorder characterized by the
inflammation of the synovium. The body’s immune system attacks the synovial membrane,
leading to the formation of a pannus that destroys cartilage and bone. This distinguishes it
from osteoarthritis, which is primarily a degenerative condition.
4. In the pathophysiology of osteoporosis, which molecule binds to RANK receptors to
stimulate osteoclast activity?
A. Osteoprotegerin (OPG)
B. Calcitonin
, C. Vitamin D
D. RANKL
Answer: D
Rationale: RANKL (Receptor Activator of Nuclear Factor kappa-B Ligand) is essential for
the differentiation and activation of osteoclasts. When RANKL binds to its receptor RANK
on osteoclast precursors, it triggers bone resorption. Osteoporosis occurs when the balance
between RANKL and its decoy receptor OPG is disrupted, often due to estrogen deficiency.
5. Polycystic Ovary Syndrome (PCOS) is frequently associated with which metabolic
abnormality?
A. Insulin resistance and hyperinsulinemia
B. Increased insulin sensitivity
C. Hypogonadotropic hypogonadism
D. Primary adrenal insufficiency
Answer: A
Rationale: Insulin resistance plays a central role in the pathogenesis of PCOS by
stimulating the ovaries to produce excess androgens. This hyperinsulinemia also reduces
the production of sex hormone-binding globulin, further increasing free testosterone levels.
Consequently, patients often experience ovulatory dysfunction and metabolic syndrome.
