NR 507 Weeks 4–5 Edapt Questions & Study Guide – Advanced Pathophysiology 2026/2027

NR 507 WEEKS 4–5 EDAPT QUESTIONS & STUDY
GUIDE – ADVANCED PATHOPHYSIOLOGY 2026/2027


NR 507 Weeks 4–5 Edapt-Style Practice Examination
Advanced Pathophysiology | 2026/2027
Exam Description

This 200-question comprehensive practice examination assesses advanced pathophysiology
concepts associated with Week 4: Renal and Urinary System Pathologies and Week 5:
Respiratory Pathophysiology. Questions emphasize mechanisms of disease, clinical
manifestations, compensatory responses, diagnostic findings, and application of
pathophysiologic principles to patient scenarios.

The examination contains four-option multiple-choice questions with one best answer. The
cognitive distribution is approximately 30% basic recall, 50% application, and 20%
analysis/critical thinking, with 100 questions allocated to each section.



Table of Contents

Section Content Questions

I Week 4 — Renal and Urinary System Pathophysiology 1–100

II Week 5 — Respiratory Pathophysiology 101–200



SECTION I — RENAL AND URINARY SYSTEM PATHOPHYSIOLOGY
Questions 1–100

Question 1

Which structure is primarily responsible for filtration of blood within the nephron?

A. Loop of Henle
B. Glomerulus
C. Collecting duct
D. Distal convoluted tubule

,Correct Answer: B. Glomerulus

Rationale: The glomerulus filters plasma through a specialized capillary network and filtration
barrier. The other structures primarily modify filtrate through reabsorption and secretion.


Question 2

Which hormone directly increases water reabsorption in the collecting ducts?

A. Aldosterone
B. Renin
C. Antidiuretic hormone
D. Atrial natriuretic peptide

Correct Answer: C. Antidiuretic hormone

Rationale: Antidiuretic hormone increases collecting-duct water permeability by promoting
aquaporin-2 insertion. Aldosterone primarily increases sodium reabsorption and potassium
secretion.



Question 3

Which finding is most characteristic of a lower urinary tract infection?

A. Costovertebral angle tenderness
B. Flank pain with fever
C. Urinary urgency and dysuria
D. White blood cell casts

Correct Answer: C. Urinary urgency and dysuria
Rationale: Lower urinary tract infection commonly causes dysuria, frequency, urgency, and
suprapubic discomfort. Fever, flank pain, and urinary casts suggest upper urinary tract
involvement.



Question 4
What is the primary function of aldosterone in the distal nephron?

A. Increase sodium reabsorption and potassium secretion
B. Increase glucose filtration
C. Decrease hydrogen ion secretion
D. Prevent water movement through the collecting duct

,Correct Answer: A. Increase sodium reabsorption and potassium secretion

Rationale: Aldosterone promotes epithelial sodium channel activity and Na⁺/K⁺-ATPase activity,
increasing sodium retention and potassium secretion. It does not directly produce the aquaporin-
mediated water permeability caused by ADH.



Question 5

Which laboratory measurement is commonly used to estimate glomerular filtration?

A. Serum creatinine
B. Serum albumin
C. Hemoglobin
D. Serum amylase

Correct Answer: A. Serum creatinine

Rationale: Serum creatinine is used with demographic variables to estimate glomerular filtration
rate. Albumin and hemoglobin provide information about other physiologic processes.



Question 6

Which condition is classified as a prerenal cause of acute kidney injury?

A. Acute tubular necrosis
B. Renal artery obstruction
C. Severe volume depletion
D. Acute glomerulonephritis

Correct Answer: C. Severe volume depletion
Rationale: Prerenal kidney injury results from inadequate renal perfusion without primary renal
parenchymal injury initially. Severe volume depletion reduces effective circulating volume and
renal blood flow.



Question 7
Which finding is most consistent with nephrotic syndrome?

A. Heavy proteinuria
B. Red blood cell casts only
C. Severe dysuria
D. Increased urine concentration from dehydration

, Correct Answer: A. Heavy proteinuria

Rationale: Nephrotic syndrome is characterized by substantial protein loss in the urine,
hypoalbuminemia, edema, and often hyperlipidemia. Red blood cell casts are more strongly
associated with glomerular inflammatory disease.



Question 8

Which finding is most suggestive of glomerular inflammation?

A. Red blood cell casts
B. Glucosuria with normal serum glucose
C. Isolated dysuria
D. Urinary retention

Correct Answer: A. Red blood cell casts

Rationale: Red blood cell casts form within renal tubules when bleeding originates from the
nephron, particularly the glomerulus. Dysuria and retention primarily suggest lower urinary tract
dysfunction.



Question 9

Which mechanism contributes most directly to edema in nephrotic syndrome?
A. Increased plasma oncotic pressure
B. Decreased plasma oncotic pressure
C. Increased urinary sodium excretion
D. Increased lymphatic clearance
Correct Answer: B. Decreased plasma oncotic pressure

Rationale: Loss of albumin in urine decreases plasma oncotic pressure and promotes movement
of fluid into the interstitial compartment. Sodium and water retention can further amplify the
edema.



Question 10

Which acid-base abnormality is commonly associated with advanced chronic kidney disease?

A. Respiratory alkalosis
B. Metabolic alkalosis