Davita PCT Final Exam Complete Study Guide
2026/ 2027 with Practice Questions and Solutions
1|Page
,DaVita PCT Final Exam Complete Study Guide 2026/2027
2026/2027 Examination
Total Questions: 200
Instructions:
• Answer all questions.
• Select the single best answer.
• Each question has four answer choices: A, B, C, and D.
• Select only ONE answer for each question.
SECTION 1: Kidney Anatomy, Physiology, and ESRD Fundamentals
Questions 1–25
Q1. A PCT is educating a patient newly diagnosed with end-stage renal disease. The patient asks
which structure is the fundamental functional unit of the kidney responsible for urine formation.
What is the correct response?
A. The renal pelvis
B. The nephron
C. The glomerular basement membrane
D. The loop of Henle
Correct Answer: B. The nephron
Rationale: The nephron is the basic structural and functional unit of the kidney, with each kidney
containing approximately one million nephrons. Each nephron consists of a glomerulus, Bowman's
capsule, proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct.
The renal pelvis is a collecting structure, the glomerular basement membrane is only one component
of the filtration barrier, and the loop of Henle is just one segment of the nephron.
Q2. A patient with chronic kidney disease asks why their healthcare provider monitors
glomerular filtration rate (GFR). The PCT should explain that GFR provides the best overall index of
which of the following?
A. The kidney's ability to concentrate urine
B. The number of functioning nephrons and overall kidney function
C. The amount of protein being excreted in the urine
D. The kidney's endocrine function
Correct Answer: B. The number of functioning nephrons and overall kidney function
Rationale: GFR is considered the best overall index of kidney function because it reflects the
total rate at which the kidneys filter blood. Normal GFR is approximately 125 mL/min. A declining
GFR indicates loss of functioning nephrons. Urine concentration, protein excretion, and endocrine
function are separate aspects of kidney function that do not directly measure filtration capacity.
2|Page
, Q3. During a patient assessment, the PCT notes that a patient with ESRD has a serum potassium
level of 6.5 mEq/L. Which physiological function of the kidneys is most directly impaired to cause this
elevation?
A. Regulation of acid-base balance
B. Excretion of metabolic waste products
C. Regulation of electrolyte balance
D. Production of erythropoietin
Correct Answer: C. Regulation of electrolyte balance
Rationale: The kidneys normally regulate electrolyte balance by excreting excess potassium and
other electrolytes. In ESRD, this regulatory function is lost, leading to hyperkalemia. While the
kidneys also regulate acid-base balance, excrete waste products, and produce erythropoietin, the
specific elevation of potassium is directly related to impaired electrolyte regulation.
Q4. A PCT is reviewing laboratory results for a patient with ESRD. Which pattern of laboratory
values would the PCT expect to see?
A. Elevated BUN, elevated creatinine, decreased hemoglobin
B. Decreased BUN, elevated creatinine, elevated hemoglobin
C. Elevated BUN, decreased creatinine, decreased hemoglobin
D. Decreased BUN, decreased creatinine, elevated hemoglobin
Correct Answer: A. Elevated BUN, elevated creatinine, decreased hemoglobin
Rationale: In ESRD, the kidneys cannot effectively excrete waste products, resulting in elevated
blood urea nitrogen (BUN) and serum creatinine. Additionally, decreased erythropoietin production
by the failing kidneys leads to anemia (decreased hemoglobin). The combination of elevated BUN,
elevated creatinine, and decreased hemoglobin is characteristic of ESRD.
Q5. A patient asks the PCT why they develop bone pain and fractures. The PCT explains that the
kidneys normally perform which function that is disrupted in kidney failure?
A. Production of parathyroid hormone
B. Activation of vitamin D
C. Production of calcitonin
D. Regulation of phosphorus excretion only
Correct Answer: B. Activation of vitamin D
Rationale: The kidneys are responsible for converting vitamin D to its active form (calcitriol). In
kidney failure, this activation is impaired, leading to decreased calcium absorption, elevated
parathyroid hormone levels, and renal osteodystrophy. The parathyroid glands produce PTH, not the
kidneys. Calcitonin is produced by the thyroid gland.
3|Page
, Q6. The PCT is caring for a patient who has been prescribed erythropoietin-stimulating agents.
The PCT understands that this medication addresses which kidney function?
A. Regulation of blood pressure
B. Excretion of urea
C. Production of erythropoietin
D. Regulation of sodium balance
Correct Answer: C. Production of erythropoietin
Rationale: The kidneys produce erythropoietin, a hormone that stimulates red blood cell
production in the bone marrow. In kidney failure, erythropoietin production decreases, causing
anemia. Erythropoietin-stimulating agents replace this lost function. Blood pressure regulation, urea
excretion, and sodium balance are separate kidney functions.
Q7. A PCT is explaining the concept of residual renal function to a patient. Which statement best
describes residual renal function?
A. The amount of kidney function that remains after dialysis initiation
B. The kidney's ability to produce urine after transplantation
C. The total kidney function before any damage occurred
D. The function of the transplanted kidney
Correct Answer: A. The amount of kidney function that remains after dialysis initiation
Rationale: Residual renal function refers to the remaining kidney function a patient has after
starting dialysis. Even small amounts of residual function contribute to clearance of solutes and fluid
removal, and preservation of residual renal function is associated with better patient outcomes. It is
distinct from total pre-damage function or transplanted kidney function.
Q8. Which of the following best describes the primary mechanism by which the kidneys regulate
blood pressure?
A. By producing angiotensin-converting enzyme
B. By regulating fluid volume and secreting renin
C. By producing aldosterone directly
D. By directly innervating blood vessels
Correct Answer: B. By regulating fluid volume and secreting renin
Rationale: The kidneys regulate blood pressure through two primary mechanisms: regulating
extracellular fluid volume through sodium and water excretion, and secreting renin in response to
decreased renal perfusion. Renin initiates the renin-angiotensin-aldosterone system. The kidneys do
not produce ACE (that occurs primarily in the lungs) or aldosterone (produced by the adrenal
cortex).
4|Page
2026/ 2027 with Practice Questions and Solutions
1|Page
,DaVita PCT Final Exam Complete Study Guide 2026/2027
2026/2027 Examination
Total Questions: 200
Instructions:
• Answer all questions.
• Select the single best answer.
• Each question has four answer choices: A, B, C, and D.
• Select only ONE answer for each question.
SECTION 1: Kidney Anatomy, Physiology, and ESRD Fundamentals
Questions 1–25
Q1. A PCT is educating a patient newly diagnosed with end-stage renal disease. The patient asks
which structure is the fundamental functional unit of the kidney responsible for urine formation.
What is the correct response?
A. The renal pelvis
B. The nephron
C. The glomerular basement membrane
D. The loop of Henle
Correct Answer: B. The nephron
Rationale: The nephron is the basic structural and functional unit of the kidney, with each kidney
containing approximately one million nephrons. Each nephron consists of a glomerulus, Bowman's
capsule, proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct.
The renal pelvis is a collecting structure, the glomerular basement membrane is only one component
of the filtration barrier, and the loop of Henle is just one segment of the nephron.
Q2. A patient with chronic kidney disease asks why their healthcare provider monitors
glomerular filtration rate (GFR). The PCT should explain that GFR provides the best overall index of
which of the following?
A. The kidney's ability to concentrate urine
B. The number of functioning nephrons and overall kidney function
C. The amount of protein being excreted in the urine
D. The kidney's endocrine function
Correct Answer: B. The number of functioning nephrons and overall kidney function
Rationale: GFR is considered the best overall index of kidney function because it reflects the
total rate at which the kidneys filter blood. Normal GFR is approximately 125 mL/min. A declining
GFR indicates loss of functioning nephrons. Urine concentration, protein excretion, and endocrine
function are separate aspects of kidney function that do not directly measure filtration capacity.
2|Page
, Q3. During a patient assessment, the PCT notes that a patient with ESRD has a serum potassium
level of 6.5 mEq/L. Which physiological function of the kidneys is most directly impaired to cause this
elevation?
A. Regulation of acid-base balance
B. Excretion of metabolic waste products
C. Regulation of electrolyte balance
D. Production of erythropoietin
Correct Answer: C. Regulation of electrolyte balance
Rationale: The kidneys normally regulate electrolyte balance by excreting excess potassium and
other electrolytes. In ESRD, this regulatory function is lost, leading to hyperkalemia. While the
kidneys also regulate acid-base balance, excrete waste products, and produce erythropoietin, the
specific elevation of potassium is directly related to impaired electrolyte regulation.
Q4. A PCT is reviewing laboratory results for a patient with ESRD. Which pattern of laboratory
values would the PCT expect to see?
A. Elevated BUN, elevated creatinine, decreased hemoglobin
B. Decreased BUN, elevated creatinine, elevated hemoglobin
C. Elevated BUN, decreased creatinine, decreased hemoglobin
D. Decreased BUN, decreased creatinine, elevated hemoglobin
Correct Answer: A. Elevated BUN, elevated creatinine, decreased hemoglobin
Rationale: In ESRD, the kidneys cannot effectively excrete waste products, resulting in elevated
blood urea nitrogen (BUN) and serum creatinine. Additionally, decreased erythropoietin production
by the failing kidneys leads to anemia (decreased hemoglobin). The combination of elevated BUN,
elevated creatinine, and decreased hemoglobin is characteristic of ESRD.
Q5. A patient asks the PCT why they develop bone pain and fractures. The PCT explains that the
kidneys normally perform which function that is disrupted in kidney failure?
A. Production of parathyroid hormone
B. Activation of vitamin D
C. Production of calcitonin
D. Regulation of phosphorus excretion only
Correct Answer: B. Activation of vitamin D
Rationale: The kidneys are responsible for converting vitamin D to its active form (calcitriol). In
kidney failure, this activation is impaired, leading to decreased calcium absorption, elevated
parathyroid hormone levels, and renal osteodystrophy. The parathyroid glands produce PTH, not the
kidneys. Calcitonin is produced by the thyroid gland.
3|Page
, Q6. The PCT is caring for a patient who has been prescribed erythropoietin-stimulating agents.
The PCT understands that this medication addresses which kidney function?
A. Regulation of blood pressure
B. Excretion of urea
C. Production of erythropoietin
D. Regulation of sodium balance
Correct Answer: C. Production of erythropoietin
Rationale: The kidneys produce erythropoietin, a hormone that stimulates red blood cell
production in the bone marrow. In kidney failure, erythropoietin production decreases, causing
anemia. Erythropoietin-stimulating agents replace this lost function. Blood pressure regulation, urea
excretion, and sodium balance are separate kidney functions.
Q7. A PCT is explaining the concept of residual renal function to a patient. Which statement best
describes residual renal function?
A. The amount of kidney function that remains after dialysis initiation
B. The kidney's ability to produce urine after transplantation
C. The total kidney function before any damage occurred
D. The function of the transplanted kidney
Correct Answer: A. The amount of kidney function that remains after dialysis initiation
Rationale: Residual renal function refers to the remaining kidney function a patient has after
starting dialysis. Even small amounts of residual function contribute to clearance of solutes and fluid
removal, and preservation of residual renal function is associated with better patient outcomes. It is
distinct from total pre-damage function or transplanted kidney function.
Q8. Which of the following best describes the primary mechanism by which the kidneys regulate
blood pressure?
A. By producing angiotensin-converting enzyme
B. By regulating fluid volume and secreting renin
C. By producing aldosterone directly
D. By directly innervating blood vessels
Correct Answer: B. By regulating fluid volume and secreting renin
Rationale: The kidneys regulate blood pressure through two primary mechanisms: regulating
extracellular fluid volume through sodium and water excretion, and secreting renin in response to
decreased renal perfusion. Renin initiates the renin-angiotensin-aldosterone system. The kidneys do
not produce ACE (that occurs primarily in the lungs) or aldosterone (produced by the adrenal
cortex).
4|Page
