NUR 631/NUR631 Exam 4 V3 | Advanced
Physiology and Pathophysiology Q&A with
Rationale | Grand Canyon University
1. A patient is diagnosed with stage 3 chronic kidney disease (CKD). Which glomerular
filtration rate (GFR) range is consistent with this diagnosis?
A. GFR 60-89 mL/min/1.73 m²
B. GFR 15-29 mL/min/1.73 m²
C. GFR 30-59 mL/min/1.73 m²
D. GFR <15 mL/min/1.73 m²
Answer: C
Rationale: Stage 3 chronic kidney disease is characterized by a moderate decrease in GFR,
specifically between 30 and 59 mL/min. During this stage, the kidneys are still functioning
but show significant loss of efficiency in filtering waste products from the blood.
Management typically focuses on slowing progression and treating complications like
hypertension or anemia.
2. What is the primary pathophysiological mechanism behind the development of
gastroesophageal reflux disease (GERD)?
A. Transient relaxation of the lower esophageal sphincter
B. Increased pressure in the lower esophageal sphincter (LES)
,C. Accelerated gastric emptying
D. Decreased production of gastric acid
Answer: A
Rationale: The most common cause of GERD is the inappropriate, transient relaxation of
the lower esophageal sphincter (LES). This relaxation allows acidic gastric contents to
reflux into the esophagus, leading to mucosal irritation and typical symptoms like
heartburn. Factors such as obesity, pregnancy, and certain medications can exacerbate this
sphincter incompetence.
3. A patient presents with massive proteinuria (>3.5 g/day), hypoalbuminemia, and
generalized edema. Which condition is most likely?
A. Acute Tubular Necrosis (ATN)
B. Nephrotic Syndrome
C. Nephritic Syndrome
D. Prerenal Azotemia
Answer: B
Rationale: Nephrotic syndrome is defined by a triad of massive proteinuria,
hypoalbuminemia, and peripheral edema. This condition occurs due to increased
glomerular permeability, which allows large quantities of plasma proteins to escape into
the urine. The loss of albumin leads to decreased plasma oncotic pressure, resulting in fluid
shifting into the interstitial space.
, 4. Which of the following is the most significant risk factor for the development of Peptic
Ulcer Disease (PUD)?
A. Helicobacter pylori infection
B. High-fiber diet
C. Vitamin D deficiency
D. Excessive physical exercise
Answer: A
Rationale: Helicobacter pylori is a gram-negative bacterium that is a leading cause of
peptic ulcers worldwide. It survives in the acidic environment of the stomach by secreting
urease and causes chronic inflammation that weakens the protective mucosal lining. Long-
term use of Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) is the second most common
risk factor for this condition.
5. In the context of liver cirrhosis, what is the underlying cause of esophageal varices?
A. Hepatic encephalopathy
B. Decreased albumin synthesis
C. Portal hypertension
D. Accumulation of unconjugated bilirubin
Answer: C
Physiology and Pathophysiology Q&A with
Rationale | Grand Canyon University
1. A patient is diagnosed with stage 3 chronic kidney disease (CKD). Which glomerular
filtration rate (GFR) range is consistent with this diagnosis?
A. GFR 60-89 mL/min/1.73 m²
B. GFR 15-29 mL/min/1.73 m²
C. GFR 30-59 mL/min/1.73 m²
D. GFR <15 mL/min/1.73 m²
Answer: C
Rationale: Stage 3 chronic kidney disease is characterized by a moderate decrease in GFR,
specifically between 30 and 59 mL/min. During this stage, the kidneys are still functioning
but show significant loss of efficiency in filtering waste products from the blood.
Management typically focuses on slowing progression and treating complications like
hypertension or anemia.
2. What is the primary pathophysiological mechanism behind the development of
gastroesophageal reflux disease (GERD)?
A. Transient relaxation of the lower esophageal sphincter
B. Increased pressure in the lower esophageal sphincter (LES)
,C. Accelerated gastric emptying
D. Decreased production of gastric acid
Answer: A
Rationale: The most common cause of GERD is the inappropriate, transient relaxation of
the lower esophageal sphincter (LES). This relaxation allows acidic gastric contents to
reflux into the esophagus, leading to mucosal irritation and typical symptoms like
heartburn. Factors such as obesity, pregnancy, and certain medications can exacerbate this
sphincter incompetence.
3. A patient presents with massive proteinuria (>3.5 g/day), hypoalbuminemia, and
generalized edema. Which condition is most likely?
A. Acute Tubular Necrosis (ATN)
B. Nephrotic Syndrome
C. Nephritic Syndrome
D. Prerenal Azotemia
Answer: B
Rationale: Nephrotic syndrome is defined by a triad of massive proteinuria,
hypoalbuminemia, and peripheral edema. This condition occurs due to increased
glomerular permeability, which allows large quantities of plasma proteins to escape into
the urine. The loss of albumin leads to decreased plasma oncotic pressure, resulting in fluid
shifting into the interstitial space.
, 4. Which of the following is the most significant risk factor for the development of Peptic
Ulcer Disease (PUD)?
A. Helicobacter pylori infection
B. High-fiber diet
C. Vitamin D deficiency
D. Excessive physical exercise
Answer: A
Rationale: Helicobacter pylori is a gram-negative bacterium that is a leading cause of
peptic ulcers worldwide. It survives in the acidic environment of the stomach by secreting
urease and causes chronic inflammation that weakens the protective mucosal lining. Long-
term use of Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) is the second most common
risk factor for this condition.
5. In the context of liver cirrhosis, what is the underlying cause of esophageal varices?
A. Hepatic encephalopathy
B. Decreased albumin synthesis
C. Portal hypertension
D. Accumulation of unconjugated bilirubin
Answer: C
