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BARKLEY-STYLE RENAL/GENITOURINARY PRACTICE
EXAM 2026/2027 COMPLETE (100) CURRENT TESTING
QUESTIONS AND CORRECT ANSWERS WITH DETAILED
RATIONALES.
RENAL/GENITOURINARY
Prepare for the Barkley Renal/Genitourinary Practice Exam with a focused study
resource covering essential renal and genitourinary concepts for advanced nursing
practice. It supports review of assessment findings, common renal and genitourinary
disorders, diagnostic considerations, pharmacologic management, and evidence-
based patient care. Use the material to reinforce clinical knowledge, strengthen
diagnostic reasoning, and identify areas that may require additional study. This
resource is best suited for nurse practitioner students and certification candidates
preparing for renal and genitourinary content areas.
MULTIPLE CHOICE.
SECTION 1: RENAL ANATOMY & PHYSIOLOGY (Questions 1-10)
1. The functional unit of the kidney responsible for filtration, reabsorption,
and secretion is the:
a) Glomerulus
b) Nephron
c) Loop of Henle
d) Collecting duct
Answer: b) Nephron
Rationale: The nephron is the functional unit of the kidney. Each kidney
contains approximately 1 million nephrons, each consisting of a glomerulus
(for filtration), proximal convoluted tubule, loop of Henle, distal convoluted
tubule, and collecting duct. The nephron is responsible for filtering blood,
reabsorbing essential substances, and secreting waste products.
2. The glomerular filtration rate (GFR) is primarily determined by which of
the following?
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a) Blood pressure and renal blood flow
b) Tubular reabsorption rate
c) Serum creatinine concentration
d) Urine output
Answer: a) Blood pressure and renal blood flow
Rationale: GFR is primarily determined by renal blood flow and the
hydrostatic pressure within the glomerular capillaries. Autoregulation
maintains GFR within a narrow range despite changes in systemic blood
pressure. A decrease in renal blood flow or blood pressure leads to a
decrease in GFR.
3. Which hormone is produced by the kidney and stimulates red blood
cell production?
a) Renin
b) Erythropoietin
c) Calcitriol
d) Aldosterone
Answer: b) Erythropoietin
Rationale: Erythropoietin (EPO) is produced by the peritubular cells in the
kidney in response to hypoxia. EPO stimulates the bone marrow to produce
red blood cells. Chronic kidney disease leads to decreased EPO production
and anemia. Renin is involved in blood pressure regulation, calcitriol is the
active form of vitamin D, and aldosterone is produced by the adrenal cortex.
4. A patient's laboratory results show a BUN/Creatinine ratio of 25:1. This
finding is most consistent with:
a) Intrinsic renal disease
b) Prerenal azotemia
c) Postrenal obstruction
d) Normal renal function
Answer: b) Prerenal azotemia
Rationale: A BUN/Creatinine ratio greater than 20:1 is suggestive of prerenal
azotemia (decreased renal perfusion, e.g., dehydration, heart failure,
, Page 3 of 38
hemorrhage). Intrinsic renal disease typically has a ratio of 10-15:1, and
postrenal obstruction may show an elevated ratio if obstruction is severe.
5. A patient's estimated GFR (eGFR) is calculated using which laboratory
value?
a) Serum BUN
b) Serum creatinine
c) Serum potassium
d) Urine protein
Answer: b) Serum creatinine
Rationale: eGFR is calculated using serum creatinine, age, sex, and race (or
without race in some equations). Creatinine is a waste product of muscle
metabolism that is filtered by the kidneys. As kidney function declines, serum
creatinine rises and eGFR falls.
6. A patient with chronic kidney disease has a calcium level of 8.0 mg/dL
and a phosphorus level of 6.0 mg/dL. Which hormonal imbalance is most
likely contributing to these findings?
a) Increased calcitonin
b) Decreased calcitriol (active vitamin D)
c) Increased parathyroid hormone (PTH)
d) Decreased erythropoietin
Answer: b) Decreased calcitriol (active vitamin D)
Rationale: In CKD, the kidneys fail to convert 25-hydroxyvitamin D to 1,25-
dihydroxyvitamin D (calcitriol), leading to decreased calcium absorption from
the gut. Hypocalcemia stimulates PTH secretion (secondary
hyperparathyroidism), which increases bone resorption and phosphorus
release. The primary hormonal imbalance is decreased calcitriol.
7. The kidneys play a major role in acid-base balance by:
a) Reabsorbing bicarbonate and excreting hydrogen ions
b) Excreting bicarbonate and reabsorbing hydrogen ions
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c) Producing carbonic acid
d) Regulating respiratory rate
Answer: a) Reabsorbing bicarbonate and excreting hydrogen ions
Rationale: The kidneys maintain acid-base balance by reabsorbing filtered
bicarbonate (HCO3-) and excreting hydrogen ions (H+). This process occurs
primarily in the proximal tubule and collecting duct. The kidneys can generate
new bicarbonate to replace that consumed by buffering acids.
8. A patient with dehydration has elevated BUN and creatinine. The NP
notes that the BUN/Creatinine ratio is elevated. The NP should suspect:
a) Prerenal azotemia
b) Intrarenal azotemia
c) Postrenal azotemia
d) Normal renal function
Answer: a) Prerenal azotemia
Rationale: Prerenal azotemia is caused by decreased renal perfusion
(dehydration, shock, heart failure). BUN rises disproportionately to creatinine
due to increased urea reabsorption in the proximal tubule, resulting in a
BUN/Creatinine ratio >20:1. Intrarenal azotemia (ATN, glomerulonephritis)
typically has a ratio <15:1.
9. The mechanism of action of loop diuretics (e.g., furosemide) in the
kidney is:
a) Blockade of sodium reabsorption in the proximal tubule
b) Inhibition of the Na-K-2Cl cotransporter in the thick ascending limb of the
loop of Henle
c) Antagonism of aldosterone in the collecting duct
d) Inhibition of carbonic anhydrase in the proximal tubule
Answer: b) Inhibition of the Na-K-2Cl cotransporter in the thick ascending
limb of the loop of Henle
Rationale: Loop diuretics (furosemide, bumetanide, torsemide) inhibit the
Na-K-2Cl cotransporter in the thick ascending limb of the loop of Henle,
BARKLEY-STYLE RENAL/GENITOURINARY PRACTICE
EXAM 2026/2027 COMPLETE (100) CURRENT TESTING
QUESTIONS AND CORRECT ANSWERS WITH DETAILED
RATIONALES.
RENAL/GENITOURINARY
Prepare for the Barkley Renal/Genitourinary Practice Exam with a focused study
resource covering essential renal and genitourinary concepts for advanced nursing
practice. It supports review of assessment findings, common renal and genitourinary
disorders, diagnostic considerations, pharmacologic management, and evidence-
based patient care. Use the material to reinforce clinical knowledge, strengthen
diagnostic reasoning, and identify areas that may require additional study. This
resource is best suited for nurse practitioner students and certification candidates
preparing for renal and genitourinary content areas.
MULTIPLE CHOICE.
SECTION 1: RENAL ANATOMY & PHYSIOLOGY (Questions 1-10)
1. The functional unit of the kidney responsible for filtration, reabsorption,
and secretion is the:
a) Glomerulus
b) Nephron
c) Loop of Henle
d) Collecting duct
Answer: b) Nephron
Rationale: The nephron is the functional unit of the kidney. Each kidney
contains approximately 1 million nephrons, each consisting of a glomerulus
(for filtration), proximal convoluted tubule, loop of Henle, distal convoluted
tubule, and collecting duct. The nephron is responsible for filtering blood,
reabsorbing essential substances, and secreting waste products.
2. The glomerular filtration rate (GFR) is primarily determined by which of
the following?
, Page 2 of 38
a) Blood pressure and renal blood flow
b) Tubular reabsorption rate
c) Serum creatinine concentration
d) Urine output
Answer: a) Blood pressure and renal blood flow
Rationale: GFR is primarily determined by renal blood flow and the
hydrostatic pressure within the glomerular capillaries. Autoregulation
maintains GFR within a narrow range despite changes in systemic blood
pressure. A decrease in renal blood flow or blood pressure leads to a
decrease in GFR.
3. Which hormone is produced by the kidney and stimulates red blood
cell production?
a) Renin
b) Erythropoietin
c) Calcitriol
d) Aldosterone
Answer: b) Erythropoietin
Rationale: Erythropoietin (EPO) is produced by the peritubular cells in the
kidney in response to hypoxia. EPO stimulates the bone marrow to produce
red blood cells. Chronic kidney disease leads to decreased EPO production
and anemia. Renin is involved in blood pressure regulation, calcitriol is the
active form of vitamin D, and aldosterone is produced by the adrenal cortex.
4. A patient's laboratory results show a BUN/Creatinine ratio of 25:1. This
finding is most consistent with:
a) Intrinsic renal disease
b) Prerenal azotemia
c) Postrenal obstruction
d) Normal renal function
Answer: b) Prerenal azotemia
Rationale: A BUN/Creatinine ratio greater than 20:1 is suggestive of prerenal
azotemia (decreased renal perfusion, e.g., dehydration, heart failure,
, Page 3 of 38
hemorrhage). Intrinsic renal disease typically has a ratio of 10-15:1, and
postrenal obstruction may show an elevated ratio if obstruction is severe.
5. A patient's estimated GFR (eGFR) is calculated using which laboratory
value?
a) Serum BUN
b) Serum creatinine
c) Serum potassium
d) Urine protein
Answer: b) Serum creatinine
Rationale: eGFR is calculated using serum creatinine, age, sex, and race (or
without race in some equations). Creatinine is a waste product of muscle
metabolism that is filtered by the kidneys. As kidney function declines, serum
creatinine rises and eGFR falls.
6. A patient with chronic kidney disease has a calcium level of 8.0 mg/dL
and a phosphorus level of 6.0 mg/dL. Which hormonal imbalance is most
likely contributing to these findings?
a) Increased calcitonin
b) Decreased calcitriol (active vitamin D)
c) Increased parathyroid hormone (PTH)
d) Decreased erythropoietin
Answer: b) Decreased calcitriol (active vitamin D)
Rationale: In CKD, the kidneys fail to convert 25-hydroxyvitamin D to 1,25-
dihydroxyvitamin D (calcitriol), leading to decreased calcium absorption from
the gut. Hypocalcemia stimulates PTH secretion (secondary
hyperparathyroidism), which increases bone resorption and phosphorus
release. The primary hormonal imbalance is decreased calcitriol.
7. The kidneys play a major role in acid-base balance by:
a) Reabsorbing bicarbonate and excreting hydrogen ions
b) Excreting bicarbonate and reabsorbing hydrogen ions
, Page 4 of 38
c) Producing carbonic acid
d) Regulating respiratory rate
Answer: a) Reabsorbing bicarbonate and excreting hydrogen ions
Rationale: The kidneys maintain acid-base balance by reabsorbing filtered
bicarbonate (HCO3-) and excreting hydrogen ions (H+). This process occurs
primarily in the proximal tubule and collecting duct. The kidneys can generate
new bicarbonate to replace that consumed by buffering acids.
8. A patient with dehydration has elevated BUN and creatinine. The NP
notes that the BUN/Creatinine ratio is elevated. The NP should suspect:
a) Prerenal azotemia
b) Intrarenal azotemia
c) Postrenal azotemia
d) Normal renal function
Answer: a) Prerenal azotemia
Rationale: Prerenal azotemia is caused by decreased renal perfusion
(dehydration, shock, heart failure). BUN rises disproportionately to creatinine
due to increased urea reabsorption in the proximal tubule, resulting in a
BUN/Creatinine ratio >20:1. Intrarenal azotemia (ATN, glomerulonephritis)
typically has a ratio <15:1.
9. The mechanism of action of loop diuretics (e.g., furosemide) in the
kidney is:
a) Blockade of sodium reabsorption in the proximal tubule
b) Inhibition of the Na-K-2Cl cotransporter in the thick ascending limb of the
loop of Henle
c) Antagonism of aldosterone in the collecting duct
d) Inhibition of carbonic anhydrase in the proximal tubule
Answer: b) Inhibition of the Na-K-2Cl cotransporter in the thick ascending
limb of the loop of Henle
Rationale: Loop diuretics (furosemide, bumetanide, torsemide) inhibit the
Na-K-2Cl cotransporter in the thick ascending limb of the loop of Henle,
