WALDEN NP COMPREHENSIVE
EXAM-Practice & Review Pack | 2026
Edition||Questions And Answers With
Rationales/Graded A+/2026
Update/100% Correct /Instant
Download
Exam Mode: Timed (3 hours) | Total Questions: 85
Instructions: Select the best answer for each question. Correct answers
are highlighted in bold with rationales provided.
SECTION 1: Advanced Pathophysiology (Questions 1–20)
1. A 65-year-old male with chronic heart failure presents with worsening
dyspnea and jugular venous distension. Which pathophysiological mechanism
best explains his symptoms?
A) Decreased afterload
B) Increased contractility
C) Increased preload
D) Reduced systemic vascular resistance
Rationale : Heart failure leads to reduced cardiac output, activating RAAS and
increasing preload, causing fluid overload and JVD.
2. Which cytokine is primarily responsible for fever in a patient with bacterial
pneumonia?
A) Interleukin-1 (IL-1)
B) Interferon-gamma
C) Transforming growth factor-beta
D) Interleukin-4
Rationale : IL-1 is an endogenous pyrogen that acts on the hypothalamus to
elevate body temperature.
,3. A patient with type 2 diabetes develops painful peripheral neuropathy. The
underlying mechanism involves:
A) Demyelination of motor neurons
B) Accumulation of sorbitol in Schwann cells
C) Autoimmune destruction of dorsal root ganglia
D) Vitamin B12 deficiency
Rationale : Hyperglycemia increases polyol pathway activity, leading to sorbitol
accumulation, oxidative stress, and nerve damage.
4. In septic shock, the initial compensatory mechanism that maintains mean
arterial pressure is:
A) Bradycardia
B) Tachycardia and vasoconstriction
C) Increased capillary permeability
D) Myocardial depression
Rationale : Compensatory increase in heart rate and systemic vascular resistance
attempts to preserve perfusion pressure.
5. Which statement best describes the pathogenesis of osteoarthritis?
A) Systemic autoimmune inflammation of synovium
B) Progressive loss of articular cartilage with bone remodeling
C) Uric acid crystal deposition in joint space
D) Immune complex deposition in small vessels
Rationale : OA is a degenerative joint disease involving cartilage breakdown,
subchondral bone changes, and osteophyte formation.
6. A patient with asthma experiences bronchospasm after exposure to cold air.
This is mediated by:
A) Parasympathetic reflex via vagus nerve
B) Sympathetic overactivity
C) Direct mast cell degranulation
D) Complement activation
Rationale : Cold air triggers vagal-mediated reflex bronchoconstriction, which is
reversed by anticholinergics.
7. Which finding is characteristic of chronic bronchitis on pathology?
A) Alveolar wall destruction
B) Mucous gland hyperplasia (Reid index >0.4)
C) Eosinophilic infiltration
, D) Granuloma formation
Rationale : Chronic bronchitis shows enlarged mucous glands in the bronchi,
measured by Reid index.
8. A patient with cirrhosis develops ascites. The primary mechanism is:
A) Decreased aldosterone
B) Portal hypertension causing splanchnic vasodilation
C) Increased albumin synthesis
D) Reduced ADH secretion
Rationale : Portal hypertension increases hydrostatic pressure and splanchnic
vasodilation activates RAAS, leading to sodium/water retention.
9. Which genetic mutation is most associated with cystic fibrosis?
A) F508del in CFTR gene
B) BRCA1
C) APC gene
D) HBB gene
Rationale : The most common CF mutation is deletion of phenylalanine at
position 508, causing misfolded CFTR protein.
10. A patient with myasthenia gravis experiences progressive weakness. The
pathophysiology involves:
A) Antibodies against nicotinic acetylcholine receptors
B) Demyelination of central neurons
C) Reduced acetylcholinesterase activity
D) Dopamine deficiency
Rationale : Autoantibodies block or degrade ACh receptors at the neuromuscular
junction.
11. Which lab finding is consistent with syndrome of inappropriate
antidiuretic hormone (SIADH)?
A) Serum sodium 118 mEq/L, urine osmolality >500
B) Serum sodium 155 mEq/L, urine osmolality <100
C) Serum sodium 140 mEq/L, urine osmolality 300
D) Serum sodium 130 mEq/L, urine osmolality 50
Rationale : SIADH causes dilutional hyponatremia with inappropriately
concentrated urine.
12. A child presents with steatorrhea, failure to thrive, and positive anti-tissue
transglutaminase antibodies. The likely diagnosis is:
EXAM-Practice & Review Pack | 2026
Edition||Questions And Answers With
Rationales/Graded A+/2026
Update/100% Correct /Instant
Download
Exam Mode: Timed (3 hours) | Total Questions: 85
Instructions: Select the best answer for each question. Correct answers
are highlighted in bold with rationales provided.
SECTION 1: Advanced Pathophysiology (Questions 1–20)
1. A 65-year-old male with chronic heart failure presents with worsening
dyspnea and jugular venous distension. Which pathophysiological mechanism
best explains his symptoms?
A) Decreased afterload
B) Increased contractility
C) Increased preload
D) Reduced systemic vascular resistance
Rationale : Heart failure leads to reduced cardiac output, activating RAAS and
increasing preload, causing fluid overload and JVD.
2. Which cytokine is primarily responsible for fever in a patient with bacterial
pneumonia?
A) Interleukin-1 (IL-1)
B) Interferon-gamma
C) Transforming growth factor-beta
D) Interleukin-4
Rationale : IL-1 is an endogenous pyrogen that acts on the hypothalamus to
elevate body temperature.
,3. A patient with type 2 diabetes develops painful peripheral neuropathy. The
underlying mechanism involves:
A) Demyelination of motor neurons
B) Accumulation of sorbitol in Schwann cells
C) Autoimmune destruction of dorsal root ganglia
D) Vitamin B12 deficiency
Rationale : Hyperglycemia increases polyol pathway activity, leading to sorbitol
accumulation, oxidative stress, and nerve damage.
4. In septic shock, the initial compensatory mechanism that maintains mean
arterial pressure is:
A) Bradycardia
B) Tachycardia and vasoconstriction
C) Increased capillary permeability
D) Myocardial depression
Rationale : Compensatory increase in heart rate and systemic vascular resistance
attempts to preserve perfusion pressure.
5. Which statement best describes the pathogenesis of osteoarthritis?
A) Systemic autoimmune inflammation of synovium
B) Progressive loss of articular cartilage with bone remodeling
C) Uric acid crystal deposition in joint space
D) Immune complex deposition in small vessels
Rationale : OA is a degenerative joint disease involving cartilage breakdown,
subchondral bone changes, and osteophyte formation.
6. A patient with asthma experiences bronchospasm after exposure to cold air.
This is mediated by:
A) Parasympathetic reflex via vagus nerve
B) Sympathetic overactivity
C) Direct mast cell degranulation
D) Complement activation
Rationale : Cold air triggers vagal-mediated reflex bronchoconstriction, which is
reversed by anticholinergics.
7. Which finding is characteristic of chronic bronchitis on pathology?
A) Alveolar wall destruction
B) Mucous gland hyperplasia (Reid index >0.4)
C) Eosinophilic infiltration
, D) Granuloma formation
Rationale : Chronic bronchitis shows enlarged mucous glands in the bronchi,
measured by Reid index.
8. A patient with cirrhosis develops ascites. The primary mechanism is:
A) Decreased aldosterone
B) Portal hypertension causing splanchnic vasodilation
C) Increased albumin synthesis
D) Reduced ADH secretion
Rationale : Portal hypertension increases hydrostatic pressure and splanchnic
vasodilation activates RAAS, leading to sodium/water retention.
9. Which genetic mutation is most associated with cystic fibrosis?
A) F508del in CFTR gene
B) BRCA1
C) APC gene
D) HBB gene
Rationale : The most common CF mutation is deletion of phenylalanine at
position 508, causing misfolded CFTR protein.
10. A patient with myasthenia gravis experiences progressive weakness. The
pathophysiology involves:
A) Antibodies against nicotinic acetylcholine receptors
B) Demyelination of central neurons
C) Reduced acetylcholinesterase activity
D) Dopamine deficiency
Rationale : Autoantibodies block or degrade ACh receptors at the neuromuscular
junction.
11. Which lab finding is consistent with syndrome of inappropriate
antidiuretic hormone (SIADH)?
A) Serum sodium 118 mEq/L, urine osmolality >500
B) Serum sodium 155 mEq/L, urine osmolality <100
C) Serum sodium 140 mEq/L, urine osmolality 300
D) Serum sodium 130 mEq/L, urine osmolality 50
Rationale : SIADH causes dilutional hyponatremia with inappropriately
concentrated urine.
12. A child presents with steatorrhea, failure to thrive, and positive anti-tissue
transglutaminase antibodies. The likely diagnosis is:
