WGU D440 HESI Nutrition Objective Assessment Exam Prep … 2026 Update • Verified Answers
✓ VERIFIED • 2026 UPDATE • 100% ACCURATE
WGU D440 HESI Nutrition Objective Assessment
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 HESI Nutrition Objective Assessment Exam Prep … 2026 Update • Verified Answers
Questions & Verified Answers
1. Which of the following macronutrients provides the most energy per gram?
A. Carbohydrates
B. Proteins
C. Fats
D. Alcohol
Answer: C
Rationale: Fats provide 9 kcal/g, whereas carbohydrates and proteins provide 4 kcal/g, and alcohol provides 7
kcal/g. 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 vitamin is essential for blood clotting and is often given as an injection to newborns?
A. Vitamin K
B. Vitamin A
C. Vitamin D
D. Vitamin E
Answer: A
Rationale: Vitamin K is essential for the synthesis of blood-clotting factors; newborns lack the gut bacteria to
produce it initially. This is an important clinical concept because selecting the correct answer (A) requires
understanding both the pathophysiology and the practical nursing implications. Recognizing this principle
allows the nurse to prioritize care, anticipate complications, and provide accurate patient education.
3. A deficiency in which of the following vitamins can lead to scurvy?
A. Vitamin B12
B. Vitamin C
C. Vitamin A
D. Vitamin D
Answer: B
Rationale: Vitamin C (ascorbic acid) deficiency leads to scurvy, characterized by bleeding gums and poor
wound healing. Recognizing this principle allows the nurse to prioritize care, anticipate complications, and
provide accurate patient education. Exam questions often test the ability to distinguish this concept from closely
related distractors, making a clear rationale essential for mastery.
Exam (Elaborations) • Actual Questions & Rationales Page 2
, WGU D440 HESI Nutrition Objective Assessment Exam Prep … 2026 Update • Verified Answers
4. Which mineral is primarily responsible for maintaining fluid balance outside the cells?
A. Potassium
B. Magnesium
C. Calcium
D. Sodium
Answer: D
Rationale: Sodium is the major extracellular cation responsible for fluid balance, while potassium is the major
intracellular cation. 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. Which of the following is a primary function of proteins in the body?
A. Growth and repair of tissues
B. Insulation of internal organs
C. Primary source of immediate energy
D. Storage of fat-soluble vitamins
Answer: A
Rationale: Proteins are essential for the growth, maintenance, and repair of body tissues and the production of
enzymes and hormones. This is an important clinical concept because selecting the correct answer (A) requires
understanding both the pathophysiology and the practical nursing implications. Recognizing this principle
allows the nurse to prioritize care, anticipate complications, and provide accurate patient education.
6. What is the recommended range for a healthy Body Mass Index (BMI) in adults?
A. 15.0 - 18.4
B. 18.5 - 24.9
C. 25.0 - 29.9
D. 30.0 - 34.9
Answer: B
Rationale: A BMI of 18.5 to 24.9 is considered the healthy or ‘normal’ weight range for most adults. This is an
important clinical concept because selecting the correct answer (B) requires understanding both the
pathophysiology and the practical nursing implications. Recognizing this principle allows the nurse to prioritize
care, anticipate complications, and provide accurate patient education.
Exam (Elaborations) • Actual Questions & Rationales Page 3
✓ VERIFIED • 2026 UPDATE • 100% ACCURATE
WGU D440 HESI Nutrition Objective Assessment
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 HESI Nutrition Objective Assessment Exam Prep … 2026 Update • Verified Answers
Questions & Verified Answers
1. Which of the following macronutrients provides the most energy per gram?
A. Carbohydrates
B. Proteins
C. Fats
D. Alcohol
Answer: C
Rationale: Fats provide 9 kcal/g, whereas carbohydrates and proteins provide 4 kcal/g, and alcohol provides 7
kcal/g. 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 vitamin is essential for blood clotting and is often given as an injection to newborns?
A. Vitamin K
B. Vitamin A
C. Vitamin D
D. Vitamin E
Answer: A
Rationale: Vitamin K is essential for the synthesis of blood-clotting factors; newborns lack the gut bacteria to
produce it initially. This is an important clinical concept because selecting the correct answer (A) requires
understanding both the pathophysiology and the practical nursing implications. Recognizing this principle
allows the nurse to prioritize care, anticipate complications, and provide accurate patient education.
3. A deficiency in which of the following vitamins can lead to scurvy?
A. Vitamin B12
B. Vitamin C
C. Vitamin A
D. Vitamin D
Answer: B
Rationale: Vitamin C (ascorbic acid) deficiency leads to scurvy, characterized by bleeding gums and poor
wound healing. Recognizing this principle allows the nurse to prioritize care, anticipate complications, and
provide accurate patient education. Exam questions often test the ability to distinguish this concept from closely
related distractors, making a clear rationale essential for mastery.
Exam (Elaborations) • Actual Questions & Rationales Page 2
, WGU D440 HESI Nutrition Objective Assessment Exam Prep … 2026 Update • Verified Answers
4. Which mineral is primarily responsible for maintaining fluid balance outside the cells?
A. Potassium
B. Magnesium
C. Calcium
D. Sodium
Answer: D
Rationale: Sodium is the major extracellular cation responsible for fluid balance, while potassium is the major
intracellular cation. 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. Which of the following is a primary function of proteins in the body?
A. Growth and repair of tissues
B. Insulation of internal organs
C. Primary source of immediate energy
D. Storage of fat-soluble vitamins
Answer: A
Rationale: Proteins are essential for the growth, maintenance, and repair of body tissues and the production of
enzymes and hormones. This is an important clinical concept because selecting the correct answer (A) requires
understanding both the pathophysiology and the practical nursing implications. Recognizing this principle
allows the nurse to prioritize care, anticipate complications, and provide accurate patient education.
6. What is the recommended range for a healthy Body Mass Index (BMI) in adults?
A. 15.0 - 18.4
B. 18.5 - 24.9
C. 25.0 - 29.9
D. 30.0 - 34.9
Answer: B
Rationale: A BMI of 18.5 to 24.9 is considered the healthy or ‘normal’ weight range for most adults. This is an
important clinical concept because selecting the correct answer (B) requires understanding both the
pathophysiology and the practical nursing implications. Recognizing this principle allows the nurse to prioritize
care, anticipate complications, and provide accurate patient education.
Exam (Elaborations) • Actual Questions & Rationales Page 3
