PASS WGU D440 NUTRITION OA
EXAM (2026) - PRACTICE
QUESTIONS & STUDY GUIDES
LATEST MOCK PRACTICE SET
170 Questions with Answers and Detailed Rationales
100 PERCENT GUARANTEED PASS
INSTANT DOWNLOAD ANSWERS INCLUDED
IMPORTANCE OF THIS DOCUMENT
This comprehensive examination preparation guide has been meticulously developed to help you succeed in the
PASS WGU D440 NUTRITION OA EXAM (2026) - PRACTICE QUESTIONS & STUDY GUIDES. It contains 170
carefully selected questions that reflect the most current exam content and testing strategies. Each question is
accompanied by a correct answer and a detailed rationale that explains the underlying pathophysiology,
pharmacology, or clinical reasoning.
Self-Assessment – Test your knowledge and Exam Preparation – Familiarize yourself with the
identify areas requiring further question format and content
study areas
Concept Reinforcement – Deepen your Confidence Building – Develop test-taking
understanding through strategies and reduce
evidence-based exam anxiety
rationales
Time Management – Practice answering
questions under simulated
exam conditions
Review Summary 170 Questions
Foundations - Application - PASS WGU D440 Nutrition OA 2026 & Study Guides Nutrition Science &
Clinical Dietetics Graduate
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Dietary 1-43 Disease, Nutrition, Likely, Appropriate, Pattern
Disease 44-86 Dietary, Likely, Nutrition, Appropriate, Chronic
Appropriate 87-129 Dietary, Disease, Chronic, Kidney, Explains
Likely 130-170 Disease, Appropriate, Chronic, Dietary, Nutrition
TOTAL 170 All questions include answers and detailed rationales
,Section A - Dietary
Q1.
A dietary pattern high in refined carbohydrates and saturated fats is associated with
increased cardiovascular risk. Which metabolic alteration most directly links this pattern
to endothelial dysfunction?
A. Increased postprandial lipemia and B. Upregulation of LDL receptor expression
oxidative stress causing reduced nitric oxide leading to enhanced cholesterol clearance
bioavailability
C. Suppression of hepatic gluconeogenesis D. Enhanced insulin sensitivity promoting
resulting in hypoglycemia vasodilation via Akt signaling
Correct: A - Increased postprandial lipemia and oxidative stress causing reduced nitric
oxide bioavailability
Rationale:Postprandial lipemia and oxidative stress from refined carbs and saturated fats
reduce nitric oxide (NO) bioavailability, impairing endothelial function. LDL receptor
upregulation (B) would lower cholesterol, not cause dysfunction. Hypoglycemia (C) and
enhanced insulin sensitivity (D) are not typical consequences of this pattern.
Q2.
In a patient with chronic kidney disease (CKD) not yet on dialysis, which nutritional
intervention is most appropriate to slow disease progression?
A. High-protein diet to maintain muscle B. Moderate protein restriction with high
mass biological value proteins
C. Liberal potassium intake to prevent D. Supplementation with fat-soluble vitamins
hypokalemia in high doses
Correct: B - Moderate protein restriction with high biological value proteins
Rationale:Moderate protein restriction (0.6-0.8 g/kg/day) with high biological value protein
reduces urea load and glomerular hyperfiltration, slowing CKD progression. High protein (A)
increases renal workload. Liberal potassium (C) risks hyperkalemia. High-dose fat-soluble
vitamins (D) may cause toxicity.
Q3.
Which of the following best explains the superior glycemic response to a meal with a low
glycemic index (GI) compared to a high GI meal?
A. Low GI foods stimulate greater insulin B. Low GI foods are digested and absorbed
secretion due to high protein content more slowly, reducing postprandial glucose
excursion
Page 3
, Section A - Dietary
C. Low GI foods are typically higher in fat, D. Low GI foods contain more dietary fiber,
delaying gastric emptying via CCK which directly increases insulin sensitivity
Correct: B - Low GI foods are digested and absorbed more slowly, reducing postprandial
glucose excursion
Rationale:Low GI foods are digested and absorbed slowly, flattening postprandial glucose
curves. High protein (A) may increase insulin but not the core mechanism. Fat (C) can delay
emptying but is not inherent to low GI. Fiber (D) may help but not directly increase insulin
sensitivity.
Q4.
A patient presents with microcytic anemia, ataxia, and peripheral neuropathy. Laboratory
tests reveal low serum copper and ceruloplasmin. Which nutritional deficiency is most
likely?
A. Zinc deficiency B. Iron deficiency
C. Vitamin B12 deficiency D. Selenium deficiency
Correct: A - Zinc deficiency
Rationale:Excess zinc intake can cause copper deficiency, leading to microcytic anemia and
neurological symptoms. Iron deficiency (B) causes anemia but not ataxia. B12 deficiency (C)
causes macrocytic anemia and neuropathy but not low copper. Selenium deficiency (D) does
not present with these signs.
Q5.
In the context of obesity pharmacotherapy, which of the following agents is most likely to
cause malabsorption of fat-soluble vitamins?
A. Liraglutide B. Orlistat
C. Phentermine D. Naltrexone-bupropion
Correct: B - Orlistat
Rationale:Orlistat inhibits pancreatic lipase, reducing fat absorption and thereby impairing
absorption of fat-soluble vitamins (A, D, E, K). Liraglutide (A) and phentermine (C) work
centrally. Naltrexone-bupropion (D) affects appetite centers.
Q6.
Based on current evidence, which dietary pattern is most effective for reducing systolic
blood pressure in adults with hypertension?
A. Low-carbohydrate, high-fat ketogenic diet B. High-protein, low-carbohydrate diet
Page 4
EXAM (2026) - PRACTICE
QUESTIONS & STUDY GUIDES
LATEST MOCK PRACTICE SET
170 Questions with Answers and Detailed Rationales
100 PERCENT GUARANTEED PASS
INSTANT DOWNLOAD ANSWERS INCLUDED
IMPORTANCE OF THIS DOCUMENT
This comprehensive examination preparation guide has been meticulously developed to help you succeed in the
PASS WGU D440 NUTRITION OA EXAM (2026) - PRACTICE QUESTIONS & STUDY GUIDES. It contains 170
carefully selected questions that reflect the most current exam content and testing strategies. Each question is
accompanied by a correct answer and a detailed rationale that explains the underlying pathophysiology,
pharmacology, or clinical reasoning.
Self-Assessment – Test your knowledge and Exam Preparation – Familiarize yourself with the
identify areas requiring further question format and content
study areas
Concept Reinforcement – Deepen your Confidence Building – Develop test-taking
understanding through strategies and reduce
evidence-based exam anxiety
rationales
Time Management – Practice answering
questions under simulated
exam conditions
Review Summary 170 Questions
Foundations - Application - PASS WGU D440 Nutrition OA 2026 & Study Guides Nutrition Science &
Clinical Dietetics Graduate
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Dietary 1-43 Disease, Nutrition, Likely, Appropriate, Pattern
Disease 44-86 Dietary, Likely, Nutrition, Appropriate, Chronic
Appropriate 87-129 Dietary, Disease, Chronic, Kidney, Explains
Likely 130-170 Disease, Appropriate, Chronic, Dietary, Nutrition
TOTAL 170 All questions include answers and detailed rationales
,Section A - Dietary
Q1.
A dietary pattern high in refined carbohydrates and saturated fats is associated with
increased cardiovascular risk. Which metabolic alteration most directly links this pattern
to endothelial dysfunction?
A. Increased postprandial lipemia and B. Upregulation of LDL receptor expression
oxidative stress causing reduced nitric oxide leading to enhanced cholesterol clearance
bioavailability
C. Suppression of hepatic gluconeogenesis D. Enhanced insulin sensitivity promoting
resulting in hypoglycemia vasodilation via Akt signaling
Correct: A - Increased postprandial lipemia and oxidative stress causing reduced nitric
oxide bioavailability
Rationale:Postprandial lipemia and oxidative stress from refined carbs and saturated fats
reduce nitric oxide (NO) bioavailability, impairing endothelial function. LDL receptor
upregulation (B) would lower cholesterol, not cause dysfunction. Hypoglycemia (C) and
enhanced insulin sensitivity (D) are not typical consequences of this pattern.
Q2.
In a patient with chronic kidney disease (CKD) not yet on dialysis, which nutritional
intervention is most appropriate to slow disease progression?
A. High-protein diet to maintain muscle B. Moderate protein restriction with high
mass biological value proteins
C. Liberal potassium intake to prevent D. Supplementation with fat-soluble vitamins
hypokalemia in high doses
Correct: B - Moderate protein restriction with high biological value proteins
Rationale:Moderate protein restriction (0.6-0.8 g/kg/day) with high biological value protein
reduces urea load and glomerular hyperfiltration, slowing CKD progression. High protein (A)
increases renal workload. Liberal potassium (C) risks hyperkalemia. High-dose fat-soluble
vitamins (D) may cause toxicity.
Q3.
Which of the following best explains the superior glycemic response to a meal with a low
glycemic index (GI) compared to a high GI meal?
A. Low GI foods stimulate greater insulin B. Low GI foods are digested and absorbed
secretion due to high protein content more slowly, reducing postprandial glucose
excursion
Page 3
, Section A - Dietary
C. Low GI foods are typically higher in fat, D. Low GI foods contain more dietary fiber,
delaying gastric emptying via CCK which directly increases insulin sensitivity
Correct: B - Low GI foods are digested and absorbed more slowly, reducing postprandial
glucose excursion
Rationale:Low GI foods are digested and absorbed slowly, flattening postprandial glucose
curves. High protein (A) may increase insulin but not the core mechanism. Fat (C) can delay
emptying but is not inherent to low GI. Fiber (D) may help but not directly increase insulin
sensitivity.
Q4.
A patient presents with microcytic anemia, ataxia, and peripheral neuropathy. Laboratory
tests reveal low serum copper and ceruloplasmin. Which nutritional deficiency is most
likely?
A. Zinc deficiency B. Iron deficiency
C. Vitamin B12 deficiency D. Selenium deficiency
Correct: A - Zinc deficiency
Rationale:Excess zinc intake can cause copper deficiency, leading to microcytic anemia and
neurological symptoms. Iron deficiency (B) causes anemia but not ataxia. B12 deficiency (C)
causes macrocytic anemia and neuropathy but not low copper. Selenium deficiency (D) does
not present with these signs.
Q5.
In the context of obesity pharmacotherapy, which of the following agents is most likely to
cause malabsorption of fat-soluble vitamins?
A. Liraglutide B. Orlistat
C. Phentermine D. Naltrexone-bupropion
Correct: B - Orlistat
Rationale:Orlistat inhibits pancreatic lipase, reducing fat absorption and thereby impairing
absorption of fat-soluble vitamins (A, D, E, K). Liraglutide (A) and phentermine (C) work
centrally. Naltrexone-bupropion (D) affects appetite centers.
Q6.
Based on current evidence, which dietary pattern is most effective for reducing systolic
blood pressure in adults with hypertension?
A. Low-carbohydrate, high-fat ketogenic diet B. High-protein, low-carbohydrate diet
Page 4
