WGU D440 Nutrition OA Exam Prep 2026 UPDATE 2026 Update • Verified Answers
✓ VERIFIED • 2026 UPDATE • 100% ACCURATE
WGU D440 Nutrition OA Exam Prep 2026 UPDATE
Actual Exam Questions & Verified Answers
with Detailed Rationales
Document Type: Exam (Elaborations)
Academic Year:
Total Questions: 50 Multiple Choice
Includes: Correct Answers + Full Rationales
Status: Verified & Updated for 2026
Exam (Elaborations) • Actual Questions & Rationales Page 1
,WGU D440 Nutrition OA Exam Prep 2026 UPDATE 2026 Update • Verified Answers
Questions & Verified Answers
1. Which of the following describes the Recommended Dietary Allowance (RDA)?
A. ?
B. The average daily intake level estimated to meet the requirements of half of healthy individuals.
C. The maximum amount of a nutrient unlikely to cause adverse health effects.
D. A recommended intake value based on observed or experimentally determined approximations.
Answer: A
Rationale: The RDA is set to meet the needs of 97-98% of healthy individuals in a particular life stage and
gender group. Exam questions often test the ability to distinguish this concept from closely related distractors,
making a clear rationale essential for mastery. Applying this knowledge in clinical settings supports safe,
evidence-based practice and improves patient outcomes.
2. Which macronutrient provides 9 calories per gram?
A. Carbohydrates
B. Fats
C. Proteins
D. Alcohol
Answer: B
Rationale: Fats are the most energy-dense macronutrient, providing 9 kcal/g compared to 4 kcal/g for carbs
and proteins. Exam questions often test the ability to distinguish this concept from closely related distractors,
making a clear rationale essential for mastery. Applying this knowledge in clinical settings supports safe,
evidence-based practice and improves patient outcomes.
3. Which vitamin is primarily synthesized in the skin through exposure to ultraviolet (UV) light?
A. Vitamin A
B. Vitamin D
C. Vitamin E
D. Vitamin K
Answer: B
Rationale: Vitamin D is known as the ‘sunshine vitamin’ because the body can produce it when skin is exposed
to sunlight. Exam questions often test the ability to distinguish this concept from closely related distractors,
making a clear rationale essential for mastery. Applying this knowledge in clinical settings supports safe,
evidence-based practice and improves patient outcomes.
Exam (Elaborations) • Actual Questions & Rationales Page 2
, WGU D440 Nutrition OA Exam Prep 2026 UPDATE 2026 Update • Verified Answers
4. Which of the following is a symptom of Vitamin C deficiency?
A. Night blindness
B. Scurvy
C. Osteomalacia
D. Beriberi
Answer: B
Rationale: Scurvy is caused by a lack of Vitamin C, leading to bleeding gums and poor wound healing. Exam
questions often test the ability to distinguish this concept from closely related distractors, making a clear
rationale essential for mastery. Applying this knowledge in clinical settings supports safe, evidence-based
practice and improves patient outcomes.
5. What is the primary function of low-density lipoproteins (LDL)?
A. Breaking down triglycerides into fatty acids.
B. Removing cholesterol from the blood and returning it to the liver.
C. Transporting cholesterol from the liver to the body’s tissues.
D. Synthesizing bile salts in the gallbladder.
Answer: C
Rationale: LDL is often called ‘bad’ cholesterol because it carries cholesterol to the peripheral tissues where it
can contribute to plaque formation. Exam questions often test the ability to distinguish this concept from closely
related distractors, making a clear rationale essential for mastery. Applying this knowledge in clinical settings
supports safe, evidence-based practice and improves patient outcomes.
6. Which mineral is most closely associated with the regulation of fluid balance outside the
cells?
A. Potassium
B. Magnesium
C. Calcium
D. Sodium
Answer: D
Rationale: Sodium is the primary cation in extracellular fluid and is critical for maintaining fluid balance and
blood pressure. Applying this knowledge in clinical settings supports safe, evidence-based practice and
improves patient outcomes. This is an important clinical concept because selecting the correct answer (D)
requires understanding both the pathophysiology and the practical nursing implications.
Exam (Elaborations) • Actual Questions & Rationales Page 3
✓ VERIFIED • 2026 UPDATE • 100% ACCURATE
WGU D440 Nutrition OA Exam Prep 2026 UPDATE
Actual Exam Questions & Verified Answers
with Detailed Rationales
Document Type: Exam (Elaborations)
Academic Year:
Total Questions: 50 Multiple Choice
Includes: Correct Answers + Full Rationales
Status: Verified & Updated for 2026
Exam (Elaborations) • Actual Questions & Rationales Page 1
,WGU D440 Nutrition OA Exam Prep 2026 UPDATE 2026 Update • Verified Answers
Questions & Verified Answers
1. Which of the following describes the Recommended Dietary Allowance (RDA)?
A. ?
B. The average daily intake level estimated to meet the requirements of half of healthy individuals.
C. The maximum amount of a nutrient unlikely to cause adverse health effects.
D. A recommended intake value based on observed or experimentally determined approximations.
Answer: A
Rationale: The RDA is set to meet the needs of 97-98% of healthy individuals in a particular life stage and
gender group. Exam questions often test the ability to distinguish this concept from closely related distractors,
making a clear rationale essential for mastery. Applying this knowledge in clinical settings supports safe,
evidence-based practice and improves patient outcomes.
2. Which macronutrient provides 9 calories per gram?
A. Carbohydrates
B. Fats
C. Proteins
D. Alcohol
Answer: B
Rationale: Fats are the most energy-dense macronutrient, providing 9 kcal/g compared to 4 kcal/g for carbs
and proteins. Exam questions often test the ability to distinguish this concept from closely related distractors,
making a clear rationale essential for mastery. Applying this knowledge in clinical settings supports safe,
evidence-based practice and improves patient outcomes.
3. Which vitamin is primarily synthesized in the skin through exposure to ultraviolet (UV) light?
A. Vitamin A
B. Vitamin D
C. Vitamin E
D. Vitamin K
Answer: B
Rationale: Vitamin D is known as the ‘sunshine vitamin’ because the body can produce it when skin is exposed
to sunlight. Exam questions often test the ability to distinguish this concept from closely related distractors,
making a clear rationale essential for mastery. Applying this knowledge in clinical settings supports safe,
evidence-based practice and improves patient outcomes.
Exam (Elaborations) • Actual Questions & Rationales Page 2
, WGU D440 Nutrition OA Exam Prep 2026 UPDATE 2026 Update • Verified Answers
4. Which of the following is a symptom of Vitamin C deficiency?
A. Night blindness
B. Scurvy
C. Osteomalacia
D. Beriberi
Answer: B
Rationale: Scurvy is caused by a lack of Vitamin C, leading to bleeding gums and poor wound healing. Exam
questions often test the ability to distinguish this concept from closely related distractors, making a clear
rationale essential for mastery. Applying this knowledge in clinical settings supports safe, evidence-based
practice and improves patient outcomes.
5. What is the primary function of low-density lipoproteins (LDL)?
A. Breaking down triglycerides into fatty acids.
B. Removing cholesterol from the blood and returning it to the liver.
C. Transporting cholesterol from the liver to the body’s tissues.
D. Synthesizing bile salts in the gallbladder.
Answer: C
Rationale: LDL is often called ‘bad’ cholesterol because it carries cholesterol to the peripheral tissues where it
can contribute to plaque formation. Exam questions often test the ability to distinguish this concept from closely
related distractors, making a clear rationale essential for mastery. Applying this knowledge in clinical settings
supports safe, evidence-based practice and improves patient outcomes.
6. Which mineral is most closely associated with the regulation of fluid balance outside the
cells?
A. Potassium
B. Magnesium
C. Calcium
D. Sodium
Answer: D
Rationale: Sodium is the primary cation in extracellular fluid and is critical for maintaining fluid balance and
blood pressure. Applying this knowledge in clinical settings supports safe, evidence-based practice and
improves patient outcomes. This is an important clinical concept because selecting the correct answer (D)
requires understanding both the pathophysiology and the practical nursing implications.
Exam (Elaborations) • Actual Questions & Rationales Page 3
