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100+ Free CNeph(C) Nephrology Nursing Practice Questions

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2026 Statistics

Key Facts: CNeph(C) Nephrology Nursing Exam

165

Exam Questions

CNA Certification Details

4h

Time Limit

CNA Exam Guidelines

Pass/Fail

Passing Mark

CNA Scoring Policy

$655 CAD

Member Fee

CNA Certification Fees

5 Years

Validity Period

CNA Renewal Rules

The CNA CNeph(C) exam features 165 multiple-choice questions over a 4-hour proctored window. Standard total fees for CNA members are approximately $655 CAD (non-members $841 CAD).

Sample CNeph(C) Nephrology Nursing Practice Questions

Try these sample questions to test your CNeph(C) Nephrology Nursing exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which of the following factors is the primary driver of glomerular filtration under normal physiological conditions?
A.Glomerular capillary hydrostatic pressure
B.Bowman's space hydrostatic pressure
C.Glomerular capillary oncotic pressure
D.Bowman's space oncotic pressure
Explanation: Glomerular capillary hydrostatic pressure (typically around 50 mmHg) is the primary force promoting the filtration of fluid from the glomerular capillaries into Bowman's space. This pressure is maintained by the relative resistance of the afferent and efferent arterioles. It is opposed by the hydrostatic pressure in Bowman's space and the oncotic pressure within the capillary, but under normal conditions, the capillary hydrostatic pressure is the dominant driving force.
2What primary cellular signal triggers the release of renin from the juxtaglomerular cells in the kidneys?
A.Increased sodium chloride delivery to the macula densa
B.Decreased pressure in the afferent arteriole
C.Increased systemic arterial blood pressure
D.Parasympathetic nervous system stimulation
Explanation: Renin release from juxtaglomerular cells is primarily triggered by a decrease in renal perfusion pressure, which acts directly on stretch receptors in the afferent arteriole. Other major triggers include decreased sodium chloride delivery to the macula densa and sympathetic nervous system stimulation via beta-1 adrenergic receptors. Renin initiates the conversion of angiotensinogen to angiotensin I, which is the rate-limiting step of the renin-angiotensin-aldosterone system (RAAS).
3In which segment of the nephron is the majority of filtered sodium and water reabsorbed under normal conditions?
A.Proximal convoluted tubule
B.Descending limb of the loop of Henle
C.Ascending limb of the loop of Henle
D.Distal convoluted tubule
Explanation: The proximal convoluted tubule (PCT) is responsible for reabsorbing approximately 65% of the filtered sodium, water, chloride, potassium, and calcium, as well as nearly 100% of filtered glucose and amino acids. This high rate of reabsorption is facilitated by the extensive brush border (microvilli) which dramatically increases surface area. The active transport of sodium via the basolateral Na+/K+ ATPase pump drives this mass movement of solutes and water.
4Which portion of the loop of Henle is primarily responsible for establishing the medullary osmotic gradient via the countercurrent multiplier system?
A.Thin descending limb
B.Thick ascending limb
C.Cortical collecting duct
D.Vasa recta capillaries
Explanation: The thick ascending limb of the loop of Henle actively transports sodium, potassium, and chloride out of the tubular lumen into the medullary interstitium via the Na-K-2Cl cotransporter (NKCC2). Because this segment is completely impermeable to water, this solute transport increases the osmolarity of the surrounding medullary interstitium while diluting the tubular fluid. This active separation of solute from water is the engine of the countercurrent multiplier system.
5Which cells in the kidney are the primary site of erythropoietin (EPO) production in response to tissue hypoxia?
A.Glomerular endothelial cells
B.Renal tubular epithelial cells
C.Interstitial fibroblasts in the cortex and outer medulla
D.Mesangial cells in the renal corpuscle
Explanation: Erythropoietin (EPO) is synthesized and secreted by specialized peritubular interstitial fibroblasts located in the renal cortex and outer medulla. In response to reduced oxygen delivery (hypoxia), these cells increase EPO transcription via hypoxia-inducible factors (HIF). EPO then enters the circulation and travels to the bone marrow, where it stimulates red blood cell production.
6Which enzyme, located in the proximal tubule cells, is responsible for converting 25-hydroxyvitamin D into its active form, 1,25-dihydroxyvitamin D?
A.1-alpha-hydroxylase
B.24-hydroxylase
C.Renal alkaline phosphatase
D.Angiotensin-converting enzyme
Explanation: The enzyme 1-alpha-hydroxylase (CYP27B1) is highly expressed in proximal convoluted tubule cells and catalyzes the hydroxylation of 25-hydroxyvitamin D3 to 1,25-dihydroxyvitamin D3 (calcitriol), the biologically active form of Vitamin D. This conversion is tightly regulated: it is stimulated by parathyroid hormone (PTH) and hypophosphatemia, and inhibited by high calcium, phosphate, and fibroblast growth factor 23 (FGF-23).
7By what mechanism does antidiuretic hormone (ADH) increase water permeability in the collecting duct of the nephron?
A.Upregulating sodium-glucose cotransporters in the apical membrane
B.Inserting aquaporin-2 water channels into the apical membrane
C.Increasing active water transport via basolateral ATPases
D.Relaxing the tight junctions between adjacent epithelial cells
Explanation: Antidiuretic hormone (ADH/vasopressin) binds to V2 receptors on the basolateral membrane of principal cells in the collecting duct. This activates a cyclic AMP pathway that induces the translocation of intracellular vesicles containing aquaporin-2 (AQP2) water channels to the apical (luminal) membrane. This increases the water permeability of the apical membrane, allowing water to flow passively along the osmotic gradient into the hypertonic medullary interstitium.
8What is the primary renal mechanism of compensation during a state of chronic respiratory acidosis?
A.Excreting bicarbonate ions and retaining hydrogen ions
B.Increasing bicarbonate reabsorption and ammonium excretion
C.Increasing bicarbonate excretion and reducing phosphate excretion
D.Slowing down the activity of carbonic anhydrase in the brush border
Explanation: In response to chronic respiratory acidosis (retained CO2), the kidneys compensate by upregulating hydrogen ion secretion into the tubular fluid and increasing bicarbonate reabsorption in the proximal tubule. The secreted hydrogen ions are buffered in the urine primarily by ammonia (forming ammonium, NH4+, which is excreted) and phosphate. This process generates 'new' bicarbonate, raising the serum bicarbonate levels to normalize blood pH.
9How does aldosterone influence potassium excretion in the distal nephron?
A.It inhibits potassium absorption by blocking the Na-K-2Cl cotransporter
B.It stimulates potassium secretion by upregulating basolateral Na+/K+ ATPase and apical ROMK channels
C.It promotes potassium retention by opening distal potassium-hydrogen exchangers
D.It reduces potassium filtration at the glomerulus by vasoconstricting afferent arterioles
Explanation: Aldosterone promotes potassium excretion in the principal cells of the late distal tubule and collecting duct. It binds to mineralocorticoid receptors, leading to increased expression of basolateral Na+/K+ ATPase pumps (which draw potassium into the cells) and apical epithelial sodium channels (ENaC). The resulting sodium entry depolarizes the apical membrane, creating a favorable lumen-negative electrical gradient that drives potassium secretion into the urine through apical Renal Outer Medullary Potassium (ROMK) channels.
10Which component of the glomerular filtration barrier provides the primary size-selective and charge-selective restriction to large negative proteins like albumin?
A.The fenestrated endothelial cells
B.The glomerular basement membrane and podocyte slit diaphragms
C.The mesangial matrix
D.The parietal epithelial cell layer
Explanation: The glomerular basement membrane (GBM) and the slit diaphragms between podocyte foot processes form the main size-selective and charge-selective barrier. The GBM is rich in negatively charged heparan sulfate proteoglycans, which electrostatically repel negatively charged proteins like albumin (which is also size-excluded by the narrow slit diaphragms). Damage to the podocytes or loss of this negative charge barrier leads to proteinuria, a hallmark of glomerular disease.

About the CNeph(C) Nephrology Nursing Exam

The CNeph(C) (Certified in Nephrology (C)anada) exam is administered by the Canadian Nurses Association (CNA) for registered nurses and nurse practitioners specializing in renal care. The certification tests the candidate's professional competence across five primary domains: Renal Anatomy and Physiology, Renal Disorders, Kidney Disease Management, Renal Replacement Therapies (Hemodialysis, Peritoneal Dialysis, and Kidney Transplantation), and Pharmacology and Professional Practice. Registered nurses seeking certification must hold an active Canadian license and meet clinical experience requirements of 1,950 practice hours in nephrology, or 1,000 practice hours combined with a post-basic specialty certificate.

Assessment

165 multiple-choice questions (CBT proctored online or in-person)

Time Limit

4 hours (240 minutes)

Passing Score

Criterion-referenced (Angoff method)

Exam Fee

$588 CAD (CNA member) / $780 CAD (non-member) application fee, plus $85 online (ProctorU) or $110 in-person writing appointment fee; rewrite $378 (member) / $500 (non-member). Applicable taxes extra. (Canadian Nurses Association (CNA))

CNeph(C) Nephrology Nursing Exam Content Outline

10%

Renal Anatomy and Physiology

Glomerular filtration, blood flow, tubular function, acid-base and fluid-electrolyte regulation, and renal hormones.

20%

Renal Disorders

Acute kidney injury (AKI), chronic kidney disease (CKD), glomerular, tubular, tubulointerstitial, vascular, and genetic kidney disorders.

18%

Kidney Disease Management

Conservative renal care, diet/fluid management, hypertension control, cardiovascular risk, symptom management, and palliative options.

42%

Renal Replacement Therapies

Hemodialysis (principles, access, complications), Peritoneal Dialysis (CAPD/APD, access, peritonitis), and Kidney Transplantation (donor selection, immunosuppression, rejection).

10%

Pharmacology and Professional Practice

Nephrology-specific pharmacology, dosage adjustments, advance care planning, professional ethics, and complementary therapies.

How to Pass the CNeph(C) Nephrology Nursing Exam

What You Need to Know

  • Passing score: Criterion-referenced (Angoff method)
  • Assessment: 165 multiple-choice questions (CBT proctored online or in-person)
  • Time limit: 4 hours (240 minutes)
  • Exam fee: $588 CAD (CNA member) / $780 CAD (non-member) application fee, plus $85 online (ProctorU) or $110 in-person writing appointment fee; rewrite $378 (member) / $500 (non-member). Applicable taxes extra.

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

CNeph(C) Nephrology Nursing Study Tips from Top Performers

1Focus heavily on Renal Replacement Therapies (42% weighting), ensuring a deep understanding of peritoneal dialysis exchange mechanics, hemodialysis adequacy (Kt/V), and transplant rejection classifications.
2Understand fluid-electrolyte and acid-base disturbances, particularly how to interpret blood gas results in the context of advanced renal failure.
3Review the mechanism and safety profile of common nephrology medications, including erythropoiesis-stimulating agents (ESAs), intravenous iron, phosphate binders, and calcimimetics.
4Review the clinical differences between acute kidney injury (AKI) stages and the staging criteria for chronic kidney disease (CKD) based on GFR and albuminuria.
5Prepare for professional and ethical questions, including end-of-life decision-making, withdrawal from dialysis, and advance care planning.

Frequently Asked Questions

What is the CNeph(C) designation?

The CNeph(C) is the national specialty credential for Canadian registered nurses and nurse practitioners specializing in nephrology nursing, granted by the Canadian Nurses Association (CNA).

How many hours of practice do I need to qualify for the exam?

You need either 1,950 hours of nursing practice in nephrology within the last 5 years, or 1,000 hours of practice combined with a completed post-basic course in nephrology nursing within the last 5 years.

How is the passing score determined?

The CNA uses a criterion-referenced passing standard set by an expert nurse committee using the modified Angoff method. Scores are reported simply as Pass or Unsuccessful; no numerical scores are provided.

What is the fee for the CNeph(C) exam in 2026?

The application fee for CNA members is $570 CAD plus an $85 online proctoring fee (total $655 CAD before taxes). Non-members pay a $756 CAD application fee plus the $85 booking fee (total $841 CAD before taxes).