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WGU D440 Nutrition OA Exam 2026/2027 |
Complete Study Guide with Must-Know
Q&A | Proven Tips to Pass on First Try | Pass
Guaranteed - A+ Graded
SECTION 1: NUTRITION BASICS & MACRO/MICRONUTRIENTS
Q1: A nurse is reviewing a patient's 24-hour dietary recall. The patient consumed: 2 slices wheat
toast with butter, 1 cup orange juice, grilled chicken sandwich with lettuce and tomato, small bag
of pretzels, and spaghetti with meat sauce for dinner. Which macronutrient is most likely
deficient in this diet?
A. Carbohydrates, as the patient needs more refined grains for energy
B. Proteins, because only one meal contained significant protein
C. Lipids, due to insufficient intake of healthy fats throughout the day
D. Fiber, as whole grain and vegetable intake appears inadequate [CORRECT]
Correct Answer: D
Rationale: While the diet contains adequate carbohydrates (toast, pretzels, spaghetti) and protein
(chicken, meat sauce), it lacks sufficient whole grains, legumes, fruits, and vegetables. The wheat
toast may not be whole grain, and vegetable portions are minimal. Fiber deficiency is common in
diets relying on refined carbohydrates and limited produce. Option A is incorrect because refined
carbohydrates are already excessive; B is incorrect because protein intake is adequate; C is
incorrect because butter provides some fat, though quality could improve.
Q2: Which vitamin acts as a coenzyme in collagen synthesis, functions as an antioxidant, and
enhances iron absorption when consumed with non-heme iron sources?
A. Vitamin A
B. Vitamin C [CORRECT]
C. Vitamin E
D. Vitamin K
,2
Correct Answer: B
Rationale: Vitamin C (ascorbic acid) is essential for hydroxylation of proline and lysine in
collagen formation, donates electrons as an antioxidant, and converts ferric iron (Fe³⁺) to ferrous
iron (Fe²⁺) to enhance absorption from plant sources. Vitamin A supports vision and immunity
but not collagen synthesis. Vitamin E is primarily an antioxidant for lipid membranes. Vitamin K
is essential for blood clotting factors, not collagen.
[PROVEN TIP: Vitamin "C" = Collagen, Citrus, and Conversion of iron! When you see
collagen synthesis or iron absorption, think Vitamin C immediately.]
Q3: A 42-year-old male patient asks the nurse about omega-3 fatty acids. Which response best
explains the primary cardiovascular benefit of eicosapentaenoic acid (EPA) and docosahexaenoic
acid (DHA)?
A. They lower LDL cholesterol by blocking absorption in the intestine
B. They reduce inflammation, decrease triglycerides, and may prevent arrhythmias
[CORRECT]
C. They increase HDL cholesterol synthesis in the liver
D. They replace saturated fats in cell membranes to improve flexibility
Correct Answer: B
Rationale: EPA and DHA primarily reduce cardiovascular risk through anti-inflammatory effects
(competing with arachidonic acid), lowering triglycerides by 20-50%, and stabilizing cardiac cell
membranes to reduce arrhythmia risk. They do not significantly block LDL absorption (that's
plant sterols/fiber), nor do they dramatically increase HDL or simply replace saturated fats in
membranes. The anti-inflammatory and anti-arrhythmic effects are their most evidence-based
cardioprotective mechanisms.
Q4: A nurse is calculating the BMI of a patient who is 5'6" (66 inches) tall and weighs 185
pounds. What is this patient's BMI classification?
A. 24.9 - Normal weight
B. 26.2 - Overweight
C. 29.9 - Overweight [CORRECT]
D. 32.1 - Obese Class I
Correct Answer: C
, 3
Rationale: BMI = (weight in pounds × 703) ÷ (height in inches)² = (185 × 703) ÷ (66)² =
130,055 ÷ 4,356 = 29.85, rounded to 29.9. Classification: 18.5-24.9 normal, 25-29.9 overweight,
30+ obese. This patient is at the upper threshold of overweight, nearly Class I obesity. Option A
miscalculates as normal; B under-calculates; D over-calculates into obese range.
Q5: Which mineral deficiency is most likely to develop in a patient with Crohn's disease
affecting the terminal ileum, and what are the characteristic manifestations?
A. Iron deficiency causing microcytic anemia
B. Vitamin B12 deficiency causing macrocytic anemia and neurological symptoms
[CORRECT]
C. Calcium deficiency causing tetany and bone demineralization
D. Zinc deficiency causing impaired wound healing and dermatitis
Correct Answer: B
Rationale: The terminal ileum is the exclusive site of intrinsic factor-vitamin B12 complex
absorption. Crohn's disease involvement here causes B12 malabsorption, leading to
megaloblastic (macrocytic) anemia and potential irreversible neurological damage (posterior
column demyelination). While iron deficiency (A) occurs with duodenal disease, and
calcium/zinc deficiencies (C, D) may occur with malabsorption, B12 deficiency is most specific
to terminal ileum pathology.
Q6: A patient with hypertension is placed on a DASH diet. Which meal best aligns with DASH
principles?
A. Canned chicken noodle soup, saltine crackers, and iced tea
B. Grilled salmon, quinoa, steamed broccoli, and fresh berries [CORRECT]
C. Deli turkey sandwich with pickles and potato chips
D. Frozen pepperoni pizza and diet soda
Correct Answer: B
Rationale: The DASH (Dietary Approaches to Stop Hypertension) diet emphasizes fruits,
vegetables, whole grains, lean proteins, and low-fat dairy while limiting sodium to 2,300 mg
(ideally 1,500 mg). Grilled salmon provides omega-3s and lean protein; quinoa is whole grain;
broccoli and berries provide potassium, magnesium, and fiber. Option A is high in sodium
(canned soup); C contains processed deli meat (high sodium) and chips; D is high in sodium,
saturated fat, and refined carbohydrates.
WGU D440 Nutrition OA Exam 2026/2027 |
Complete Study Guide with Must-Know
Q&A | Proven Tips to Pass on First Try | Pass
Guaranteed - A+ Graded
SECTION 1: NUTRITION BASICS & MACRO/MICRONUTRIENTS
Q1: A nurse is reviewing a patient's 24-hour dietary recall. The patient consumed: 2 slices wheat
toast with butter, 1 cup orange juice, grilled chicken sandwich with lettuce and tomato, small bag
of pretzels, and spaghetti with meat sauce for dinner. Which macronutrient is most likely
deficient in this diet?
A. Carbohydrates, as the patient needs more refined grains for energy
B. Proteins, because only one meal contained significant protein
C. Lipids, due to insufficient intake of healthy fats throughout the day
D. Fiber, as whole grain and vegetable intake appears inadequate [CORRECT]
Correct Answer: D
Rationale: While the diet contains adequate carbohydrates (toast, pretzels, spaghetti) and protein
(chicken, meat sauce), it lacks sufficient whole grains, legumes, fruits, and vegetables. The wheat
toast may not be whole grain, and vegetable portions are minimal. Fiber deficiency is common in
diets relying on refined carbohydrates and limited produce. Option A is incorrect because refined
carbohydrates are already excessive; B is incorrect because protein intake is adequate; C is
incorrect because butter provides some fat, though quality could improve.
Q2: Which vitamin acts as a coenzyme in collagen synthesis, functions as an antioxidant, and
enhances iron absorption when consumed with non-heme iron sources?
A. Vitamin A
B. Vitamin C [CORRECT]
C. Vitamin E
D. Vitamin K
,2
Correct Answer: B
Rationale: Vitamin C (ascorbic acid) is essential for hydroxylation of proline and lysine in
collagen formation, donates electrons as an antioxidant, and converts ferric iron (Fe³⁺) to ferrous
iron (Fe²⁺) to enhance absorption from plant sources. Vitamin A supports vision and immunity
but not collagen synthesis. Vitamin E is primarily an antioxidant for lipid membranes. Vitamin K
is essential for blood clotting factors, not collagen.
[PROVEN TIP: Vitamin "C" = Collagen, Citrus, and Conversion of iron! When you see
collagen synthesis or iron absorption, think Vitamin C immediately.]
Q3: A 42-year-old male patient asks the nurse about omega-3 fatty acids. Which response best
explains the primary cardiovascular benefit of eicosapentaenoic acid (EPA) and docosahexaenoic
acid (DHA)?
A. They lower LDL cholesterol by blocking absorption in the intestine
B. They reduce inflammation, decrease triglycerides, and may prevent arrhythmias
[CORRECT]
C. They increase HDL cholesterol synthesis in the liver
D. They replace saturated fats in cell membranes to improve flexibility
Correct Answer: B
Rationale: EPA and DHA primarily reduce cardiovascular risk through anti-inflammatory effects
(competing with arachidonic acid), lowering triglycerides by 20-50%, and stabilizing cardiac cell
membranes to reduce arrhythmia risk. They do not significantly block LDL absorption (that's
plant sterols/fiber), nor do they dramatically increase HDL or simply replace saturated fats in
membranes. The anti-inflammatory and anti-arrhythmic effects are their most evidence-based
cardioprotective mechanisms.
Q4: A nurse is calculating the BMI of a patient who is 5'6" (66 inches) tall and weighs 185
pounds. What is this patient's BMI classification?
A. 24.9 - Normal weight
B. 26.2 - Overweight
C. 29.9 - Overweight [CORRECT]
D. 32.1 - Obese Class I
Correct Answer: C
, 3
Rationale: BMI = (weight in pounds × 703) ÷ (height in inches)² = (185 × 703) ÷ (66)² =
130,055 ÷ 4,356 = 29.85, rounded to 29.9. Classification: 18.5-24.9 normal, 25-29.9 overweight,
30+ obese. This patient is at the upper threshold of overweight, nearly Class I obesity. Option A
miscalculates as normal; B under-calculates; D over-calculates into obese range.
Q5: Which mineral deficiency is most likely to develop in a patient with Crohn's disease
affecting the terminal ileum, and what are the characteristic manifestations?
A. Iron deficiency causing microcytic anemia
B. Vitamin B12 deficiency causing macrocytic anemia and neurological symptoms
[CORRECT]
C. Calcium deficiency causing tetany and bone demineralization
D. Zinc deficiency causing impaired wound healing and dermatitis
Correct Answer: B
Rationale: The terminal ileum is the exclusive site of intrinsic factor-vitamin B12 complex
absorption. Crohn's disease involvement here causes B12 malabsorption, leading to
megaloblastic (macrocytic) anemia and potential irreversible neurological damage (posterior
column demyelination). While iron deficiency (A) occurs with duodenal disease, and
calcium/zinc deficiencies (C, D) may occur with malabsorption, B12 deficiency is most specific
to terminal ileum pathology.
Q6: A patient with hypertension is placed on a DASH diet. Which meal best aligns with DASH
principles?
A. Canned chicken noodle soup, saltine crackers, and iced tea
B. Grilled salmon, quinoa, steamed broccoli, and fresh berries [CORRECT]
C. Deli turkey sandwich with pickles and potato chips
D. Frozen pepperoni pizza and diet soda
Correct Answer: B
Rationale: The DASH (Dietary Approaches to Stop Hypertension) diet emphasizes fruits,
vegetables, whole grains, lean proteins, and low-fat dairy while limiting sodium to 2,300 mg
(ideally 1,500 mg). Grilled salmon provides omega-3s and lean protein; quinoa is whole grain;
broccoli and berries provide potassium, magnesium, and fiber. Option A is high in sodium
(canned soup); C contains processed deli meat (high sodium) and chips; D is high in sodium,
saturated fat, and refined carbohydrates.
