WGU D440 Health and Wellness Through Nutritional
Science Review Final Exam Actual Exam 2026/2027 |
Complete Exam-Style Questions with Detailed Rationales
| Pass Guaranteed – A+ Graded
SECTION 1: NUTRITION FUNDAMENTALS AND ESSENTIAL NUTRIENTS
Q1: Which term best describes the science that studies how the body uses the nutrients
in food to maintain health?
A. Dietetics
B. Metabolism
C. Nutrition science [CORRECT]
D. Epidemiology
Correct Answer: C
Rationale: Correct because nutrition science is the discipline that examines how food
and nutrients affect body function, growth, and health maintenance, matching WGU
D440 competencies on the definition of the field.
Q2: Which of the following is classified as an essential nutrient?
A. Cholesterol
B. Dietary fiber
C. Linoleic acid (omega-6 fatty acid) [CORRECT]
D. Glucose
Correct Answer: C
Rationale: Correct because essential nutrients must be obtained from the diet as the
body cannot synthesize them in sufficient amounts; linoleic acid is an essential fatty
acid that the body cannot produce on its own.
Q3: A nutrient that the body can manufacture in adequate amounts from other
compounds is best described as:
A. Essential
B. Nonessential [CORRECT]
C. Organic
D. Inorganic
Correct Answer: B
,Rationale: Correct because a nonessential nutrient is one that the body can synthesize
internally and therefore does not need to be consumed in the diet to meet physiological
needs.
Q4: A food that provides a high amount of vitamins and minerals relative to its caloric
content is described as having high:
A. Energy density
B. Nutrient density [CORRECT]
C. Empty calories
D. Biological value
Correct Answer: B
Rationale: Correct because nutrient density refers to the proportion of essential
nutrients provided per calorie of food, a core concept in WGU D440 health and wellness
competencies.
Q5: Foods that contribute significant calories to the diet but provide few or no essential
nutrients are said to contain:
A. High biological value
B. Empty calories [CORRECT]
C. Complete proteins
D. Essential fatty acids
Correct Answer: B
Rationale: Correct because empty calories describe energy sources such as added
sugars and solid fats that supply calories without accompanying vitamins, minerals, or
fiber.
Q6: In the context of WGU D440 health promotion models, wellness is best defined as:
A. The absence of disease
B. A dynamic process of becoming aware of and making choices toward a more healthy
and fulfilling life [CORRECT]
C. The state of complete physical health only
D. A medical diagnosis of optimal function
Correct Answer: B
, Rationale: Correct because wellness encompasses physical, emotional, social, and
spiritual well-being and represents an active process of pursuing healthy lifestyle
choices, not merely the absence of illness.
Q7: Which assessment method is most commonly used to evaluate an individual's
nutritional status in a clinical setting?
A. Blood pressure monitoring
B. Electrocardiogram
C. Anthropometric measurements, biochemical tests, clinical examination, and dietary
intake assessment (ABCD approach) [CORRECT]
D. Pulmonary function testing
Correct Answer: C
Rationale: Correct because the ABCD approach—anthropometric, biochemical, clinical,
and dietary assessment—is the standard comprehensive method for determining
nutritional status as taught in WGU D440 competencies.
Q8: The professional who applies the science of nutrition to plan and supervise dietary
programs for individuals and institutions is a:
A. Nutrition scientist
B. Registered dietitian nutritionist (RDN) [CORRECT]
C. Food technologist
D. Public health nurse
Correct Answer: B
Rationale: Correct because the registered dietitian nutritionist is the credentialed
professional specifically trained to apply nutritional science principles to therapeutic
diet planning and health promotion.
Q9: Which of the following is NOT one of the six major classes of nutrients?
A. Carbohydrates
B. Proteins
C. Alcohol [CORRECT]
D. Vitamins
Correct Answer: C
Science Review Final Exam Actual Exam 2026/2027 |
Complete Exam-Style Questions with Detailed Rationales
| Pass Guaranteed – A+ Graded
SECTION 1: NUTRITION FUNDAMENTALS AND ESSENTIAL NUTRIENTS
Q1: Which term best describes the science that studies how the body uses the nutrients
in food to maintain health?
A. Dietetics
B. Metabolism
C. Nutrition science [CORRECT]
D. Epidemiology
Correct Answer: C
Rationale: Correct because nutrition science is the discipline that examines how food
and nutrients affect body function, growth, and health maintenance, matching WGU
D440 competencies on the definition of the field.
Q2: Which of the following is classified as an essential nutrient?
A. Cholesterol
B. Dietary fiber
C. Linoleic acid (omega-6 fatty acid) [CORRECT]
D. Glucose
Correct Answer: C
Rationale: Correct because essential nutrients must be obtained from the diet as the
body cannot synthesize them in sufficient amounts; linoleic acid is an essential fatty
acid that the body cannot produce on its own.
Q3: A nutrient that the body can manufacture in adequate amounts from other
compounds is best described as:
A. Essential
B. Nonessential [CORRECT]
C. Organic
D. Inorganic
Correct Answer: B
,Rationale: Correct because a nonessential nutrient is one that the body can synthesize
internally and therefore does not need to be consumed in the diet to meet physiological
needs.
Q4: A food that provides a high amount of vitamins and minerals relative to its caloric
content is described as having high:
A. Energy density
B. Nutrient density [CORRECT]
C. Empty calories
D. Biological value
Correct Answer: B
Rationale: Correct because nutrient density refers to the proportion of essential
nutrients provided per calorie of food, a core concept in WGU D440 health and wellness
competencies.
Q5: Foods that contribute significant calories to the diet but provide few or no essential
nutrients are said to contain:
A. High biological value
B. Empty calories [CORRECT]
C. Complete proteins
D. Essential fatty acids
Correct Answer: B
Rationale: Correct because empty calories describe energy sources such as added
sugars and solid fats that supply calories without accompanying vitamins, minerals, or
fiber.
Q6: In the context of WGU D440 health promotion models, wellness is best defined as:
A. The absence of disease
B. A dynamic process of becoming aware of and making choices toward a more healthy
and fulfilling life [CORRECT]
C. The state of complete physical health only
D. A medical diagnosis of optimal function
Correct Answer: B
, Rationale: Correct because wellness encompasses physical, emotional, social, and
spiritual well-being and represents an active process of pursuing healthy lifestyle
choices, not merely the absence of illness.
Q7: Which assessment method is most commonly used to evaluate an individual's
nutritional status in a clinical setting?
A. Blood pressure monitoring
B. Electrocardiogram
C. Anthropometric measurements, biochemical tests, clinical examination, and dietary
intake assessment (ABCD approach) [CORRECT]
D. Pulmonary function testing
Correct Answer: C
Rationale: Correct because the ABCD approach—anthropometric, biochemical, clinical,
and dietary assessment—is the standard comprehensive method for determining
nutritional status as taught in WGU D440 competencies.
Q8: The professional who applies the science of nutrition to plan and supervise dietary
programs for individuals and institutions is a:
A. Nutrition scientist
B. Registered dietitian nutritionist (RDN) [CORRECT]
C. Food technologist
D. Public health nurse
Correct Answer: B
Rationale: Correct because the registered dietitian nutritionist is the credentialed
professional specifically trained to apply nutritional science principles to therapeutic
diet planning and health promotion.
Q9: Which of the following is NOT one of the six major classes of nutrients?
A. Carbohydrates
B. Proteins
C. Alcohol [CORRECT]
D. Vitamins
Correct Answer: C
