Pathophysiology D236 - Week 4 Practice Quiz 2026 |WGU
1. What is considered the best indicator of overall renal function in clinical
practice?
A. Blood Urea Nitrogen (BUN) levels
B. Glomerular Filtration Rate (GFR)
C. Urine Specific Gravity
D. Serum Potassium levels
Answer: B
Rationale: GFR is the most accurate measure of how well the kidneys are filtering waste
from the blood. While BUN and Creatinine are used, GFR accounts for age, sex, and body
size.
2. Which clinical manifestation is a hallmark sign of Nephrotic Syndrome?
A. Hypokalemia
B. Gross hematuria (cola-colored urine)
C. Massive proteinuria (>3.5g/day)
D. High serum albumin
Answer: C
Rationale: Nephrotic syndrome is characterized by heavy proteinuria, hypoalbuminemia,
and peripheral edema due to glomerular damage.
,3. In the Renin-Angiotensin-Aldosterone System (RAAS), what is the primary
trigger for the release of Renin?
A. High blood pressure
B. Decreased renal perfusion or low blood pressure
C. Increased sodium concentration in the distal tubule
D. Excessive water intake
Answer: B
Rationale: Renin is released by the juxtaglomerular cells in response to low blood pressure
or reduced blood flow to the kidneys.
4. Which type of Acute Kidney Injury (AKI) is caused by a massive hemorrhage
leading to hypovolemia?
A. Intrarenal AKI
B. Postrenal AKI
C. Prerenal AKI
D. Chronic Kidney Disease
Answer: C
Rationale: Prerenal AKI is caused by factors that reduce blood flow to the kidney before it
reaches the renal structures, such as hypovolemia or heart failure.
5. A patient with Benign Prostatic Hyperplasia (BPH) is at risk for which type of
kidney injury?
A. Prerenal AKI
B. Acute Tubular Necrosis
C. Postrenal AKI
D. Nephrotic Syndrome
Answer: C
Rationale: Postrenal AKI results from mechanical obstruction of urine outflow, such as
BPH, kidney stones, or tumors.
, 6. What is the primary distinguishing feature between Cystitis and
Pyelonephritis?
A. Fever, chills, and costovertebral angle (CVA) tenderness
B. Pain during urination (dysuria)
C. Presence of bacteria in urine
D. Increased urinary frequency
Answer: A
Rationale: Pyelonephritis is an upper UTI affecting the kidney parenchyma and pelvis,
often presenting with systemic symptoms like fever and CVA tenderness, which are usually
absent in cystitis.
7. Post-streptococcal glomerulonephritis is typically caused by which
mechanism?
A. Direct viral invasion of the kidney
B. Chronic use of NSAIDs
C. Deposition of immune complexes in the glomerular basement membrane
D. Ascending urinary tract infection
Answer: C
Rationale: It is a Type III hypersensitivity reaction where antigen-antibody complexes
deposit in the glomeruli following a Group A Strep infection.
8. Which electrolyte imbalance is the most life-threatening complication of end-
stage renal disease?
A. Hypocalcemia
B. Hypernatremia
C. Hypomagnesemia
D. Hyperkalemia
Answer: D
1. What is considered the best indicator of overall renal function in clinical
practice?
A. Blood Urea Nitrogen (BUN) levels
B. Glomerular Filtration Rate (GFR)
C. Urine Specific Gravity
D. Serum Potassium levels
Answer: B
Rationale: GFR is the most accurate measure of how well the kidneys are filtering waste
from the blood. While BUN and Creatinine are used, GFR accounts for age, sex, and body
size.
2. Which clinical manifestation is a hallmark sign of Nephrotic Syndrome?
A. Hypokalemia
B. Gross hematuria (cola-colored urine)
C. Massive proteinuria (>3.5g/day)
D. High serum albumin
Answer: C
Rationale: Nephrotic syndrome is characterized by heavy proteinuria, hypoalbuminemia,
and peripheral edema due to glomerular damage.
,3. In the Renin-Angiotensin-Aldosterone System (RAAS), what is the primary
trigger for the release of Renin?
A. High blood pressure
B. Decreased renal perfusion or low blood pressure
C. Increased sodium concentration in the distal tubule
D. Excessive water intake
Answer: B
Rationale: Renin is released by the juxtaglomerular cells in response to low blood pressure
or reduced blood flow to the kidneys.
4. Which type of Acute Kidney Injury (AKI) is caused by a massive hemorrhage
leading to hypovolemia?
A. Intrarenal AKI
B. Postrenal AKI
C. Prerenal AKI
D. Chronic Kidney Disease
Answer: C
Rationale: Prerenal AKI is caused by factors that reduce blood flow to the kidney before it
reaches the renal structures, such as hypovolemia or heart failure.
5. A patient with Benign Prostatic Hyperplasia (BPH) is at risk for which type of
kidney injury?
A. Prerenal AKI
B. Acute Tubular Necrosis
C. Postrenal AKI
D. Nephrotic Syndrome
Answer: C
Rationale: Postrenal AKI results from mechanical obstruction of urine outflow, such as
BPH, kidney stones, or tumors.
, 6. What is the primary distinguishing feature between Cystitis and
Pyelonephritis?
A. Fever, chills, and costovertebral angle (CVA) tenderness
B. Pain during urination (dysuria)
C. Presence of bacteria in urine
D. Increased urinary frequency
Answer: A
Rationale: Pyelonephritis is an upper UTI affecting the kidney parenchyma and pelvis,
often presenting with systemic symptoms like fever and CVA tenderness, which are usually
absent in cystitis.
7. Post-streptococcal glomerulonephritis is typically caused by which
mechanism?
A. Direct viral invasion of the kidney
B. Chronic use of NSAIDs
C. Deposition of immune complexes in the glomerular basement membrane
D. Ascending urinary tract infection
Answer: C
Rationale: It is a Type III hypersensitivity reaction where antigen-antibody complexes
deposit in the glomeruli following a Group A Strep infection.
8. Which electrolyte imbalance is the most life-threatening complication of end-
stage renal disease?
A. Hypocalcemia
B. Hypernatremia
C. Hypomagnesemia
D. Hyperkalemia
Answer: D
