DaVita PCT Final Exam Review Questions and Answers (2026/2027) Verified Answers - A+ Graded
DaVita PCT Final Exam Review
Questions and Answers (2026/2027)
Verified Answers • A+ Graded Rationales • Aligned with 2026-2027 DaVita Training
Standards
Total Questions: 200 Multiple Choice & SATA Questions
Sections: 11 Content Areas per DaVita PCT Curriculum
Cognitive Levels: 30% Recall • 50% Application • 20% Analysis
Question Style: 75% Scenario-Based • 20% Direct Recall • 5% Clinical Analysis
Aligned With: CMS Conditions for Coverage, AAMI Standards, KDIGO Guidelines, DaVita P&P;
Format: 4-option MCQ (A-D), Single Correct Answer, Detailed Rationale Provided
Exam Instructions: This comprehensive exam is designed to assess PCT competency across all domains of dialysis patient care. Select the
single best answer for each question. Some questions may have "All of the above" as the correct option when multiple interventions are
required. Rationales provide clinical reasoning referencing DaVita protocols, CMS Conditions for Coverage, and evidence-based nephrology
practice. This exam is for educational review; always consult current facility P&Ps; and medical direction for clinical decision-making.
Section 1: Kidney Anatomy, Physiology, and ESRD
Fundamentals (Q1-Q30)
Q1: A PCT is educating a newly admitted patient about the basic structural and functional unit of the
kidney. Which statement by the patient indicates correct understanding of the nephron?
A. There are approximately 100 nephrons per kidney that filter blood and produce urine.
B. There are approximately 1 million nephrons per kidney that filter blood and produce urine.
[CORRECT]
C. There are approximately 10,000 nephrons per kidney that regulate blood pressure only.
D. There are approximately 500,000 nephrons per kidney that produce renin exclusively.
Correct Answer: B
Rationale: The nephron is the basic structural and functional unit of the kidney, with approximately 1 million
nephrons per kidney. Each nephron is responsible for filtering blood and producing urine through glomerular
filtration, tubular reabsorption, and tubular secretion. The other options significantly underestimate the nephron count
and misrepresent their comprehensive function.
Page 1 | DaVita PCT Final Exam Review 2026/2027 | Verified Answers
,DaVita PCT Final Exam Review Questions and Answers (2026/2027) Verified Answers - A+ Graded
Q2: A patient with chronic kidney disease asks the PCT at what GFR level dialysis or transplant becomes
necessary to sustain life. What is the correct response?
A. GFR less than 30 mL/min/1.73m²
B. GFR less than 45 mL/min/1.73m²
C. GFR less than 15 mL/min/1.73m² [CORRECT]
D. GFR less than 60 mL/min/1.73m²
Correct Answer: C
Rationale: End-Stage Renal Disease (ESRD) is defined as a GFR of less than 15 mL/min/1.73m², at which point
dialysis or kidney transplant is required to sustain life. This is Stage 5 CKD per KDIGO classification. Higher
thresholds represent earlier CKD stages where conservative management may still be appropriate.
Q3: A patient with ESRD presents with a hemoglobin of 8.2 g/dL and reports profound fatigue. The PCT
recognizes that the kidney's endocrine function most directly responsible for red blood cell production is:
A. Renin secretion activating the RAAS system
B. Activation of Vitamin D to calcitriol
C. Erythropoietin (EPO) production stimulating the bone marrow [CORRECT]
D. Aldosterone release from the adrenal cortex
Correct Answer: C
Rationale: Erythropoietin (EPO) is an endocrine hormone produced by the peritubular interstitial cells of the kidney
that stimulates red blood cell production in the bone marrow. In ESRD, EPO deficiency causes normocytic
normochromic anemia, the most common hematologic complication of CKD. Renin regulates blood pressure,
calcitriol regulates calcium, and aldosterone is produced by the adrenals, not the kidneys.
Q4: During a team huddle, a PCT is asked which endocrine hormone the kidney secretes in response to
decreased renal perfusion and low blood pressure to activate the RAAS system. The correct response is:
A. Erythropoietin
B. Renin [CORRECT]
C. Calcitriol
D. Antidiuretic hormone
Correct Answer: B
Rationale: Renin is secreted by the juxtaglomerular cells of the kidney in response to decreased renal perfusion, low
blood pressure, or low sodium delivery to the macula densa. Renin converts angiotensinogen to angiotensin I,
initiating the RAAS cascade that ultimately increases blood pressure and sodium retention. EPO, calcitriol, and ADH
are not the initiating hormones of RAAS.
Page 2 | DaVita PCT Final Exam Review 2026/2027 | Verified Answers
,DaVita PCT Final Exam Review Questions and Answers (2026/2027) Verified Answers - A+ Graded
Q5: A patient with CKD stage 4 has a low serum calcium, elevated PTH, and bone pain. The PCT
understands that the kidney normally activates Vitamin D by converting inactive 25-hydroxyvitamin D
to the active form known as:
A. Cholecalciferol
B. Ergocalciferol
C. Calcitriol (1,25-dihydroxyvitamin D) [CORRECT]
D. Calcitonin
Correct Answer: C
Rationale: The kidney converts 25-hydroxyvitamin D (calcifediol) to its active form, calcitriol (1,25-dihydroxyvitamin
D), via the enzyme 1-alpha-hydroxylase. Calcitriol promotes intestinal calcium absorption and suppresses PTH. In
CKD, reduced calcitriol production contributes to hypocalcemia, secondary hyperparathyroidism, and renal
osteodystrophy. Cholecalciferol and ergocalciferol are dietary precursors; calcitonin is produced by the thyroid.
Q6: A patient with long-standing ESRD has laboratory results showing: calcium 7.8 mg/dL (low),
phosphorus 7.2 mg/dL (high), PTH 850 pg/mL (very high), and elevated alkaline phosphatase. The PCT
correctly identifies this pattern as:
A. Left ventricular hypertrophy secondary to anemia
B. Chronic Kidney Disease-Mineral Bone Disorder (CKD-MBD) [CORRECT]
C. Acute pyelonephritis with sepsis
D. Nephrotic syndrome with proteinuria
Correct Answer: B
Rationale: CKD-MBD is characterized by abnormalities in calcium, phosphorus, parathyroid hormone (PTH), and
Vitamin D metabolism, accompanied by soft tissue calcification and bone disease. The classic lab pattern is low
calcium, high phosphorus, elevated PTH (secondary hyperparathyroidism), and elevated alkaline phosphatase
reflecting high bone turnover. LVH is cardiac; pyelonephritis is infectious; nephrotic syndrome involves proteinuria.
Q7: A PCT is explaining the excretory functions of the kidney to a patient's family. Which statement best
describes how the kidney maintains fluid balance?
A. Through ultrafiltration, the kidney regulates total body water by adjusting urine output based on
fluid intake and physiological needs. [CORRECT]
B. Through diffusion of electrolytes across the tubular membrane, fluid is automatically balanced.
C. Through secretion of antidiuretic hormone directly into the bloodstream.
D. Through active transport of glucose back into the peritubular capillaries.
Correct Answer: A
Rationale: Fluid balance is an excretory function achieved primarily through ultrafiltration at the glomerulus and
regulated reabsorption in the tubules. The kidney adjusts urine output to match fluid intake and physiological needs.
Diffusion handles electrolytes; ADH is secreted by the hypothalamus/posterior pituitary (not the kidney); glucose
reabsorption is a tubular transport function, not fluid balance.
Page 3 | DaVita PCT Final Exam Review 2026/2027 | Verified Answers
, DaVita PCT Final Exam Review Questions and Answers (2026/2027) Verified Answers - A+ Graded
Q8: A patient presents with hyperkalemia. The PCT understands that the kidney maintains electrolyte
balance primarily through which mechanism?
A. Ultrafiltration of sodium at the glomerulus
B. Diffusion of electrolytes across the tubular membranes with selective reabsorption and secretion
[CORRECT]
C. Osmosis of water into the collecting duct
D. Active secretion of bicarbonate into the urine
Correct Answer: B
Rationale: Electrolyte balance is maintained through diffusion of electrolytes (sodium, potassium, chloride, etc.)
across tubular membranes, with selective reabsorption and secretion in different nephron segments. The distal tubule
and collecting duct regulate potassium excretion. Ultrafiltration creates the filtrate but does not directly balance
electrolytes; osmosis handles water movement; bicarbonate is reabsorbed, not primarily secreted.
Q9: A patient with CKD has a serum bicarbonate of 18 mEq/L (low), indicating metabolic acidosis. The
PCT recognizes that the kidney maintains acid-base balance primarily through:
A. Secretion of hydrogen ions and reabsorption/regeneration of bicarbonate [CORRECT]
B. Excretion of excess oxygen through the lungs
C. Conversion of CO2 to bicarbonate in the liver
D. Release of aldosterone to retain sodium
Correct Answer: A
Rationale: The kidney maintains acid-base balance through bicarbonate buffering: it reabsorbs filtered bicarbonate
in the proximal tubule, regenerates new bicarbonate, and secretes hydrogen ions into the tubular lumen. In CKD,
impaired bicarbonate regeneration leads to metabolic acidosis. The lungs handle CO2 excretion; the liver does not
convert CO2 to bicarbonate; aldosterone regulates sodium, not acid-base.
Q10: A patient asks why dialysis is required when kidneys fail. The PCT explains that the kidney
removes metabolic waste products such as urea, creatinine, and uric acid through which excretory
function?
A. Waste removal through glomerular filtration and tubular secretion [CORRECT]
B. Waste removal through endocrine hormonal degradation
C. Waste removal through passive reabsorption only
D. Waste removal through renin-angiotensin cleavage
Correct Answer: A
Rationale: Waste removal is an excretory function achieved through glomerular filtration (where blood is filtered and
waste enters the tubule) and tubular secretion (where additional waste is actively transported from blood into the
tubule). Urea, creatinine, and uric acid are nitrogenous wastes that accumulate in ESRD. Endocrine functions
regulate hormones, not waste; passive reabsorption retains substances; renin does not degrade waste.
Page 4 | DaVita PCT Final Exam Review 2026/2027 | Verified Answers
DaVita PCT Final Exam Review
Questions and Answers (2026/2027)
Verified Answers • A+ Graded Rationales • Aligned with 2026-2027 DaVita Training
Standards
Total Questions: 200 Multiple Choice & SATA Questions
Sections: 11 Content Areas per DaVita PCT Curriculum
Cognitive Levels: 30% Recall • 50% Application • 20% Analysis
Question Style: 75% Scenario-Based • 20% Direct Recall • 5% Clinical Analysis
Aligned With: CMS Conditions for Coverage, AAMI Standards, KDIGO Guidelines, DaVita P&P;
Format: 4-option MCQ (A-D), Single Correct Answer, Detailed Rationale Provided
Exam Instructions: This comprehensive exam is designed to assess PCT competency across all domains of dialysis patient care. Select the
single best answer for each question. Some questions may have "All of the above" as the correct option when multiple interventions are
required. Rationales provide clinical reasoning referencing DaVita protocols, CMS Conditions for Coverage, and evidence-based nephrology
practice. This exam is for educational review; always consult current facility P&Ps; and medical direction for clinical decision-making.
Section 1: Kidney Anatomy, Physiology, and ESRD
Fundamentals (Q1-Q30)
Q1: A PCT is educating a newly admitted patient about the basic structural and functional unit of the
kidney. Which statement by the patient indicates correct understanding of the nephron?
A. There are approximately 100 nephrons per kidney that filter blood and produce urine.
B. There are approximately 1 million nephrons per kidney that filter blood and produce urine.
[CORRECT]
C. There are approximately 10,000 nephrons per kidney that regulate blood pressure only.
D. There are approximately 500,000 nephrons per kidney that produce renin exclusively.
Correct Answer: B
Rationale: The nephron is the basic structural and functional unit of the kidney, with approximately 1 million
nephrons per kidney. Each nephron is responsible for filtering blood and producing urine through glomerular
filtration, tubular reabsorption, and tubular secretion. The other options significantly underestimate the nephron count
and misrepresent their comprehensive function.
Page 1 | DaVita PCT Final Exam Review 2026/2027 | Verified Answers
,DaVita PCT Final Exam Review Questions and Answers (2026/2027) Verified Answers - A+ Graded
Q2: A patient with chronic kidney disease asks the PCT at what GFR level dialysis or transplant becomes
necessary to sustain life. What is the correct response?
A. GFR less than 30 mL/min/1.73m²
B. GFR less than 45 mL/min/1.73m²
C. GFR less than 15 mL/min/1.73m² [CORRECT]
D. GFR less than 60 mL/min/1.73m²
Correct Answer: C
Rationale: End-Stage Renal Disease (ESRD) is defined as a GFR of less than 15 mL/min/1.73m², at which point
dialysis or kidney transplant is required to sustain life. This is Stage 5 CKD per KDIGO classification. Higher
thresholds represent earlier CKD stages where conservative management may still be appropriate.
Q3: A patient with ESRD presents with a hemoglobin of 8.2 g/dL and reports profound fatigue. The PCT
recognizes that the kidney's endocrine function most directly responsible for red blood cell production is:
A. Renin secretion activating the RAAS system
B. Activation of Vitamin D to calcitriol
C. Erythropoietin (EPO) production stimulating the bone marrow [CORRECT]
D. Aldosterone release from the adrenal cortex
Correct Answer: C
Rationale: Erythropoietin (EPO) is an endocrine hormone produced by the peritubular interstitial cells of the kidney
that stimulates red blood cell production in the bone marrow. In ESRD, EPO deficiency causes normocytic
normochromic anemia, the most common hematologic complication of CKD. Renin regulates blood pressure,
calcitriol regulates calcium, and aldosterone is produced by the adrenals, not the kidneys.
Q4: During a team huddle, a PCT is asked which endocrine hormone the kidney secretes in response to
decreased renal perfusion and low blood pressure to activate the RAAS system. The correct response is:
A. Erythropoietin
B. Renin [CORRECT]
C. Calcitriol
D. Antidiuretic hormone
Correct Answer: B
Rationale: Renin is secreted by the juxtaglomerular cells of the kidney in response to decreased renal perfusion, low
blood pressure, or low sodium delivery to the macula densa. Renin converts angiotensinogen to angiotensin I,
initiating the RAAS cascade that ultimately increases blood pressure and sodium retention. EPO, calcitriol, and ADH
are not the initiating hormones of RAAS.
Page 2 | DaVita PCT Final Exam Review 2026/2027 | Verified Answers
,DaVita PCT Final Exam Review Questions and Answers (2026/2027) Verified Answers - A+ Graded
Q5: A patient with CKD stage 4 has a low serum calcium, elevated PTH, and bone pain. The PCT
understands that the kidney normally activates Vitamin D by converting inactive 25-hydroxyvitamin D
to the active form known as:
A. Cholecalciferol
B. Ergocalciferol
C. Calcitriol (1,25-dihydroxyvitamin D) [CORRECT]
D. Calcitonin
Correct Answer: C
Rationale: The kidney converts 25-hydroxyvitamin D (calcifediol) to its active form, calcitriol (1,25-dihydroxyvitamin
D), via the enzyme 1-alpha-hydroxylase. Calcitriol promotes intestinal calcium absorption and suppresses PTH. In
CKD, reduced calcitriol production contributes to hypocalcemia, secondary hyperparathyroidism, and renal
osteodystrophy. Cholecalciferol and ergocalciferol are dietary precursors; calcitonin is produced by the thyroid.
Q6: A patient with long-standing ESRD has laboratory results showing: calcium 7.8 mg/dL (low),
phosphorus 7.2 mg/dL (high), PTH 850 pg/mL (very high), and elevated alkaline phosphatase. The PCT
correctly identifies this pattern as:
A. Left ventricular hypertrophy secondary to anemia
B. Chronic Kidney Disease-Mineral Bone Disorder (CKD-MBD) [CORRECT]
C. Acute pyelonephritis with sepsis
D. Nephrotic syndrome with proteinuria
Correct Answer: B
Rationale: CKD-MBD is characterized by abnormalities in calcium, phosphorus, parathyroid hormone (PTH), and
Vitamin D metabolism, accompanied by soft tissue calcification and bone disease. The classic lab pattern is low
calcium, high phosphorus, elevated PTH (secondary hyperparathyroidism), and elevated alkaline phosphatase
reflecting high bone turnover. LVH is cardiac; pyelonephritis is infectious; nephrotic syndrome involves proteinuria.
Q7: A PCT is explaining the excretory functions of the kidney to a patient's family. Which statement best
describes how the kidney maintains fluid balance?
A. Through ultrafiltration, the kidney regulates total body water by adjusting urine output based on
fluid intake and physiological needs. [CORRECT]
B. Through diffusion of electrolytes across the tubular membrane, fluid is automatically balanced.
C. Through secretion of antidiuretic hormone directly into the bloodstream.
D. Through active transport of glucose back into the peritubular capillaries.
Correct Answer: A
Rationale: Fluid balance is an excretory function achieved primarily through ultrafiltration at the glomerulus and
regulated reabsorption in the tubules. The kidney adjusts urine output to match fluid intake and physiological needs.
Diffusion handles electrolytes; ADH is secreted by the hypothalamus/posterior pituitary (not the kidney); glucose
reabsorption is a tubular transport function, not fluid balance.
Page 3 | DaVita PCT Final Exam Review 2026/2027 | Verified Answers
, DaVita PCT Final Exam Review Questions and Answers (2026/2027) Verified Answers - A+ Graded
Q8: A patient presents with hyperkalemia. The PCT understands that the kidney maintains electrolyte
balance primarily through which mechanism?
A. Ultrafiltration of sodium at the glomerulus
B. Diffusion of electrolytes across the tubular membranes with selective reabsorption and secretion
[CORRECT]
C. Osmosis of water into the collecting duct
D. Active secretion of bicarbonate into the urine
Correct Answer: B
Rationale: Electrolyte balance is maintained through diffusion of electrolytes (sodium, potassium, chloride, etc.)
across tubular membranes, with selective reabsorption and secretion in different nephron segments. The distal tubule
and collecting duct regulate potassium excretion. Ultrafiltration creates the filtrate but does not directly balance
electrolytes; osmosis handles water movement; bicarbonate is reabsorbed, not primarily secreted.
Q9: A patient with CKD has a serum bicarbonate of 18 mEq/L (low), indicating metabolic acidosis. The
PCT recognizes that the kidney maintains acid-base balance primarily through:
A. Secretion of hydrogen ions and reabsorption/regeneration of bicarbonate [CORRECT]
B. Excretion of excess oxygen through the lungs
C. Conversion of CO2 to bicarbonate in the liver
D. Release of aldosterone to retain sodium
Correct Answer: A
Rationale: The kidney maintains acid-base balance through bicarbonate buffering: it reabsorbs filtered bicarbonate
in the proximal tubule, regenerates new bicarbonate, and secretes hydrogen ions into the tubular lumen. In CKD,
impaired bicarbonate regeneration leads to metabolic acidosis. The lungs handle CO2 excretion; the liver does not
convert CO2 to bicarbonate; aldosterone regulates sodium, not acid-base.
Q10: A patient asks why dialysis is required when kidneys fail. The PCT explains that the kidney
removes metabolic waste products such as urea, creatinine, and uric acid through which excretory
function?
A. Waste removal through glomerular filtration and tubular secretion [CORRECT]
B. Waste removal through endocrine hormonal degradation
C. Waste removal through passive reabsorption only
D. Waste removal through renin-angiotensin cleavage
Correct Answer: A
Rationale: Waste removal is an excretory function achieved through glomerular filtration (where blood is filtered and
waste enters the tubule) and tubular secretion (where additional waste is actively transported from blood into the
tubule). Urea, creatinine, and uric acid are nitrogenous wastes that accumulate in ESRD. Endocrine functions
regulate hormones, not waste; passive reabsorption retains substances; renin does not degrade waste.
Page 4 | DaVita PCT Final Exam Review 2026/2027 | Verified Answers
