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CMSN(C)® practice questions

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Question 1Nutrition Science Fundamentals

Which macronutrient provides 9 kilocalories per gram when metabolized?

  1. Carbohydrate
  2. Protein
  3. Fat Correct answer.
  4. Alcohol

Explanation

Fat is the most energy-dense macronutrient, yielding roughly 9 kcal per gram, whereas carbohydrate and protein each supply about 4 kcal per gram. Alcohol supplies about 7 kcal per gram but is not classified as a macronutrient. This energy difference explains why high-fat foods contribute more calories per unit weight.

Question 2Nutrition Science Fundamentals

Which vitamin is synthesized in the skin upon exposure to ultraviolet B radiation?

  1. Vitamin A
  2. Vitamin C
  3. Vitamin D Correct answer.
  4. Vitamin K

Explanation

Ultraviolet B light converts 7-dehydrocholesterol in the skin into a vitamin D precursor that is later activated in the liver and kidney. No other vitamin listed is produced through sunlight exposure. This makes vitamin D status sensitive to sun exposure as well as dietary intake.

Question 3Nutrition Science Fundamentals

Which mineral is the primary structural component of hydroxyapatite crystals in bone?

  1. Iodine
  2. Zinc
  3. Calcium Correct answer.
  4. Iron

Explanation

Hydroxyapatite is a calcium phosphate crystal that forms the mineral matrix of bone and teeth. Calcium is therefore the dominant mineral in skeletal tissue, accounting for a large share of bone mass. The other minerals listed serve mainly regulatory or enzymatic roles rather than skeletal structure.

Question 4Nutrition Science Fundamentals

Dietary fiber that dissolves in water and forms a gel is best described as which type?

  1. Soluble fiber Correct answer.
  2. Insoluble fiber
  3. Resistant starch
  4. Functional fiber

Explanation

Soluble fiber disperses in water to form a viscous gel that slows gastric emptying and glucose absorption. Insoluble fiber does not dissolve and mainly adds bulk to stool. The gel-forming property is the defining characteristic of soluble fibers such as pectins and beta-glucans.

Question 5Nutrition Science Fundamentals

Which organ is the principal site of nutrient absorption in the gastrointestinal tract?

  1. Small intestine Correct answer.
  2. Esophagus
  3. Stomach
  4. Large intestine

Explanation

The small intestine has a vast absorptive surface created by villi and microvilli, and most macronutrients, minerals, and vitamins are absorbed there. The stomach mainly mixes and partially digests food, while the large intestine absorbs water and some electrolytes. The esophagus serves only as a conduit.

Question 6Nutrition Science Fundamentals

Which amino acids are classified as essential because the human body cannot synthesize them in adequate amounts?

  1. Lysine and methionine Correct answer.
  2. Alanine and glycine
  3. Aspartate and serine
  4. Glutamine and arginine

Explanation

Essential amino acids must be supplied by the diet because endogenous synthesis cannot meet needs. Lysine and methionine are both established essential amino acids. The other pairs listed are conditionally essential or nonessential under normal conditions.

Question 7Nutrition Science Fundamentals

Which food group is the richest source of provitamin A carotenoids such as beta-carotene?

  1. Refined grains
  2. Orange and yellow vegetables Correct answer.
  3. Vegetable oils
  4. Lean poultry

Explanation

Deep orange and yellow vegetables, along with dark leafy greens, contain substantial beta-carotene and other provitamin A carotenoids. Refined grains, poultry, and most oils contain little or none of these pigments. The body converts these carotenoids into retinol as needed.

Question 8Nutrition Science Fundamentals

What does the term 'bioavailability' describe in nutrition?

  1. The number of calories a food provides per serving
  2. The total weight of a food portion
  3. The proportion of a nutrient that is absorbed and used by the body Correct answer.
  4. The rate at which food spoils during storage

Explanation

Bioavailability refers to the fraction of an ingested nutrient that is absorbed and becomes available for physiological functions or storage. It depends on food matrix, chemical form, and interactions with other nutrients. This concept explains why equal intakes of a nutrient can produce different nutritional effects.

Question 9Nutrition Science Fundamentals

A food label lists 12 g total carbohydrate, including 5 g fiber and 4 g sugars. Approximately how many grams of starch does the item contain?

  1. 12 g
  2. 3 g Correct answer.
  3. 9 g
  4. 7 g

Explanation

Total carbohydrate is the sum of sugars, starch, and fiber. Subtracting the 5 g fiber and 4 g sugars from the 12 g total leaves about 3 g of starch. This arithmetic assumes no sugar alcohols or other carbohydrate fractions are listed.

Question 10Nutrition Science Fundamentals

A product supplies 20 g protein, 30 g carbohydrate, and 10 g fat per serving. What is the approximate energy content?

  1. 290 kcal Correct answer.
  2. 340 kcal
  3. 420 kcal
  4. 240 kcal

Explanation

Applying Atwater factors, protein contributes 20 times 4 equals 80 kcal, carbohydrate contributes 30 times 4 equals 120 kcal, and fat contributes 10 times 9 equals 90 kcal. Summing these values gives about 290 kcal per serving. The calculation uses standard energy yields of 4, 4, and 9 kcal per gram.

Question 11Nutrition Science Fundamentals

A strict vegan wants to improve protein quality. Which practice best complements a meal of rice and beans?

  1. Removing legumes from the diet
  2. Combining complementary plant proteins within the day Correct answer.
  3. Taking a calcium supplement with meals
  4. Increasing total fat intake

Explanation

Complementary proteins combine limiting amino acids so that the overall pattern meets essential amino acid needs. Rice is low in lysine while legumes are rich in it, and legumes are low in methionine, which grains supply. Combining these sources, ideally within the same day, improves protein quality without animal products.

Question 12Nutrition Science Fundamentals

A patient taking a potassium-sparing diuretic is advised about dietary potassium. Which guidance is most appropriate?

  1. Begin a high-protein diet without further review
  2. Avoid all fruits and vegetables
  3. Increase potassium-rich foods freely
  4. Monitor intake and consult the prescriber before using salt substitutes Correct answer.

Explanation

Potassium-sparing diuretics reduce renal potassium excretion, so excessive intake from foods or potassium-based salt substitutes can raise serum potassium to dangerous levels. Intake should be individualized with monitoring and prescriber guidance. Blanket restriction or liberal increase is unsafe without clinical assessment.

Question 13Nutrition Science Fundamentals

Which statement about the glycemic response of a food is most accurate?

  1. It depends only on the sugar content listed on the label
  2. It is identical for every individual regardless of physiology
  3. It measures the total fat content of a meal
  4. It reflects how quickly blood glucose rises after eating a defined carbohydrate portion Correct answer.

Explanation

The glycemic response describes the rise in blood glucose after consuming a standardized amount of available carbohydrate. It is influenced by food form, fiber, processing, and the individual's insulin sensitivity. It is not determined solely by sugar content or fat content.

Question 14Nutrition Science Fundamentals

Why is vitamin C intake important for iron nutrition in a plant-based diet?

  1. It converts heme iron into ferritin
  2. It increases iron excretion in urine
  3. It binds iron and prevents its uptake
  4. It enhances absorption of nonheme iron Correct answer.

Explanation

Vitamin C reduces ferric iron to the more absorbable ferrous form and forms a soluble complex with nonheme iron in the gut. This is especially valuable for plant-based eaters, whose iron is entirely nonheme and less well absorbed. The effect is a well-established nutrient-nutrient interaction.

Question 15Nutrition Science Fundamentals

Which mechanism best explains why dietary calcium absorption declines with age?

  1. Higher renal calcium reabsorption
  2. Reduced gastric acid and vitamin D activation efficiency Correct answer.
  3. Greater production of intrinsic factor
  4. Increased intestinal surface area

Explanation

Aging is associated with lower gastric acid secretion and reduced efficiency of vitamin D activation, both of which impair calcium absorption. Decreased intestinal surface area and changes in renal handling can also contribute. These physiological shifts raise the risk of inadequate calcium status in older adults.

Question 16Nutrition Science Fundamentals

Which dietary pattern is most consistent with reducing saturated fat intake while maintaining protein quality?

  1. Replacing fatty meats with fish, legumes, and poultry Correct answer.
  2. Removing all protein sources from the diet
  3. Increasing butter and cream consumption
  4. Adding more processed cheese to meals

Explanation

Substituting fish, legumes, and lean poultry for fatty meats lowers saturated fat while preserving or improving protein quality. Fish also supplies unsaturated fats that are beneficial for cardiovascular health. This substitution approach is more sustainable than eliminating protein foods altogether.

Question 17Nutrition Science Fundamentals

What is the primary role of thiamin (vitamin B1) in metabolism?

  1. Transporting oxygen in the bloodstream
  2. Functioning as a fat-soluble antioxidant
  3. Acting as a coenzyme in energy-yielding carbohydrate reactions Correct answer.
  4. Serving as the major structural mineral in bone

Explanation

Thiamin pyrophosphate is a coenzyme for enzymes such as pyruvate dehydrogenase and transketolase, which are central to carbohydrate metabolism and energy production. Deficiency therefore affects tissues with high energy demand, including nerves and heart. The other roles listed belong to different nutrients.

Question 18Nutrition Science Fundamentals

Which factor most directly increases the risk of folate deficiency in a person consuming adequate leafy greens?

  1. Chronic alcohol misuse Correct answer.
  2. Regular consumption of citrus fruit
  3. Moderate physical activity
  4. High dietary fiber intake from vegetables

Explanation

Alcohol interferes with folate absorption and hepatic metabolism and increases urinary folate loss, so deficiency can occur despite adequate intake. Leafy greens and citrus are good folate sources and would not cause deficiency. Physical activity and vegetable fiber are not recognized causes.

Question 19Nutrition Science Fundamentals

Which statement best describes the difference between a dietary reference intake and a tolerable upper intake level?

  1. The reference intake applies only to supplements
  2. The reference intake is a recommended intake, while the upper level is the highest habitual intake unlikely to cause harm Correct answer.
  3. The upper level is the minimum intake needed to prevent deficiency
  4. Both describe average intakes of the general population

Explanation

A dietary reference intake expresses a recommended or adequate intake level for maintaining health, while the tolerable upper intake level marks the highest chronic intake considered unlikely to pose adverse effects. These serve different purposes in assessment and planning. The upper level is not a minimum requirement.

Question 20Nutrition Science Fundamentals

A meal contains a large amount of phytate from whole grains. Which mineral's absorption is most likely to be reduced?

  1. Chloride
  2. Zinc Correct answer.
  3. Sodium
  4. Fluoride

Explanation

Phytate binds multivalent cations such as zinc, iron, and calcium in the gut, forming complexes that resist absorption. Zinc is particularly sensitive to this effect in high-phytate diets. Sodium, chloride, and fluoride are not bound in the same way.

Question 21Nutrition Science Fundamentals

Which change would most improve the accuracy of a 24-hour dietary recall in a clinical setting?

  1. Recording intake only on holidays
  2. Asking only about the previous evening meal
  3. Using a validated multiple-pass interview method Correct answer.
  4. Relying solely on the patient's memory of portion sizes

Explanation

The multiple-pass method prompts recall in stages, including a quick list, detailed description, and review, which reduces omissions and improves portion estimation. Single-meal questioning or unsupported memory alone yields incomplete data. Standardized probing improves validity across populations.

Question 22Nutrition Science Fundamentals

A patient with chronic kidney disease is most likely to require which dietary adjustment?

  1. Increased protein to very high levels without review
  2. Elimination of all fluids
  3. Unrestricted potassium and phosphorus intake
  4. Controlled intake of sodium, potassium, and phosphorus with individualized protein Correct answer.

Explanation

Reduced kidney function impairs excretion of potassium, phosphorus, and sodium, so intake is often moderated. Protein needs are individualized because both inadequate and excessive intake carry risks. Fluid restriction depends on the clinical situation and is not universal.

Question 23Nutrition Science Fundamentals

Which nutrient-nutrient interaction can reduce the absorption of levothyroxine when taken with a mineral supplement?

  1. Calcium and iron binding in the gut Correct answer.
  2. Vitamin C enhancing iron uptake
  3. Potassium competing with sodium
  4. Fiber increasing stool bulk

Explanation

Calcium and iron form complexes with levothyroxine in the gastrointestinal tract, reducing its absorption and potentially compromising thyroid hormone control. Separating the medication from these supplements by several hours is standard practice. The other interactions do not directly affect levothyroxine bioavailability.

Question 24Nutrition Science Fundamentals

Which situation best illustrates a conditionally essential nutrient?

  1. Iron in a person with adequate stores
  2. Glutamine in a critically ill patient with elevated demand Correct answer.
  3. Calcium in a young adult with normal intake
  4. Vitamin C in a healthy adult eating citrus daily

Explanation

A conditionally essential nutrient becomes limiting under specific physiological stress even though it is normally synthesized or adequately obtained. In critical illness, glutamine demand can exceed endogenous supply, so supplementation may be considered. The other examples describe nutrients that are adequately supplied or stored.

Question 25Nutrition Science Fundamentals

A researcher wants to compare the protein quality of two foods. Which measure accounts for both amino acid composition and digestibility?

  1. Net protein utilization without digestibility correction
  2. Crude protein content by Kjeldahl analysis
  3. Protein digestibility-corrected amino acid score Correct answer.
  4. Biological value alone

Explanation

The protein digestibility-corrected amino acid score combines the limiting amino acid score with a measure of digestibility, making it a more complete index of protein quality. Biological value and net protein utilization reflect retention but do not directly incorporate the amino acid scoring pattern. Crude protein content measures quantity, not quality.

Question 26Nutrition Science Fundamentals

Which macronutrient provides the most concentrated source of energy per gram?

  1. Alcohol
  2. Fat Correct answer.
  3. Carbohydrate
  4. Protein

Explanation

Fat yields about 9 kcal per gram, whereas carbohydrate and protein each yield about 4 kcal per gram. Alcohol provides about 7 kcal per gram, which is less than fat but more than the other macronutrients. Therefore, fat is the most energy-dense macronutrient.

Question 27Nutrition Science Fundamentals

Which statement best describes the role of dietary fiber in promoting satiety?

  1. It rapidly raises blood glucose to signal fullness.
  2. It reduces the volume of food consumed per meal.
  3. It slows gastric emptying and increases chewing time. Correct answer.
  4. It decreases secretion of satiety hormones.

Explanation

Dietary fiber, especially viscous soluble fiber, slows gastric emptying and prolongs the feeling of fullness. High-fiber foods also require more chewing, which can enhance satiety signals. These effects together help reduce subsequent energy intake.

Question 28Nutrition Science Fundamentals

A person follows a diet that provides 2000 kcal per day with 60 g of protein. What percentage of total energy comes from protein?

  1. 12% Correct answer.
  2. 6%
  3. 24%
  4. 30%

Explanation

Protein provides 4 kcal per gram, so 60 g contributes 240 kcal. Dividing 240 kcal by 2000 kcal and multiplying by 100 gives 12% of total energy. This falls within the acceptable macronutrient distribution range for protein.

Question 29Nutrition Science Fundamentals

Which process best explains why some water-soluble vitamins are lost during cooking?

  1. They leach into cooking water and are discarded. Correct answer.
  2. They bind to fat and are poured off.
  3. They form insoluble complexes with protein.
  4. They are destroyed by light exposure.

Explanation

Water-soluble vitamins such as vitamin C and the B-complex vitamins dissolve in cooking water. When that water is discarded, a substantial portion of these vitamins is lost. Using minimal water or incorporating the cooking liquid into the dish can reduce such losses.

Question 30Nutrition Science Fundamentals

A patient with newly diagnosed hypertension asks which dietary change is most effective for lowering blood pressure. Based on strong evidence, which recommendation should be prioritized?

  1. Increasing potassium-rich fruits and vegetables while reducing sodium Correct answer.
  2. Increasing supplemental calcium to 2000 mg daily
  3. Restricting fluid intake to less than 1 liter per day
  4. Replacing all carbohydrates with saturated fats

Explanation

The DASH eating pattern, which emphasizes potassium-rich fruits, vegetables, and low-fat dairy while limiting sodium, has the strongest evidence for lowering blood pressure. Reducing sodium and increasing potassium both independently contribute to blood pressure reduction. This combined dietary approach is widely recommended as first-line lifestyle therapy.

Question 31Assessment and Nutrition Diagnosis

Which assessment method is most appropriate for identifying recent changes in a patient's usual food and nutrient intake?

  1. A 24-hour dietary recall Correct answer.
  2. A single serum albumin measurement
  3. A food frequency questionnaire covering the past year
  4. A one-time weight measurement

Explanation

A 24-hour recall captures detailed intake for the previous day and is well suited to detecting short-term or recent dietary changes. Its short reference period makes it sensitive to current habits rather than long-term patterns.

Question 32Assessment and Nutrition Diagnosis

During a nutrition-focused physical exam, which finding most directly suggests depletion of subcutaneous fat stores?

  1. Loss of the thenar eminence muscle bulk
  2. Temporal wasting Correct answer.
  3. Decreased skin turgor over the sternum
  4. Bilateral ankle edema

Explanation

Temporal wasting reflects loss of subcutaneous fat over the temples and is a classic indicator of fat-store depletion. Muscle bulk and fluid status are assessed through separate findings.

Question 33Assessment and Nutrition Diagnosis

A patient's body mass index is calculated as 31.5 kg/m². How should this value be classified for an adult?

  1. Obesity class II
  2. Normal weight
  3. Obesity class I Correct answer.
  4. Overweight

Explanation

Adult BMI categories place 30.0 to 34.9 kg/m² in obesity class I. The value exceeds the overweight range of 25.0 to 29.9 and falls below class II.

Question 34Assessment and Nutrition Diagnosis

Which laboratory marker is used as a long-term indicator of glycemic control over approximately the previous two to three months?

  1. Serum fructosamine
  2. Random plasma glucose
  3. Fasting plasma glucose
  4. Glycated hemoglobin Correct answer.

Explanation

Glycated hemoglobin reflects average glucose exposure across the lifespan of red blood cells, roughly two to three months. Single glucose measurements reflect only the moment of collection.

Question 35Assessment and Nutrition Diagnosis

Which component belongs to the standard domain structure of the nutrition care process?

  1. Pharmacy dispensing
  2. Nutrition diagnosis Correct answer.
  3. Menu pricing
  4. Radiographic staging

Explanation

The nutrition care process comprises assessment, diagnosis, intervention, monitoring and evaluation, with nutrition diagnosis as a defined step. Menu pricing, dispensing, and staging belong to other disciplines.

Question 36Assessment and Nutrition Diagnosis

A patient reports unintentional loss of 8 percent of usual body weight over the past month. How should this be interpreted?

  1. Evidence of deliberate caloric restriction
  2. Significant weight loss warranting nutrition intervention Correct answer.
  3. Clinically insignificant weight change
  4. Expected fluctuation from daily hydration

Explanation

Unintentional loss of more than 5 percent of usual body weight within one month is generally considered clinically significant. It signals catabolism or inadequate intake and supports a nutrition diagnosis requiring intervention.

Question 37Assessment and Nutrition Diagnosis

Which PES statement component describes the evidence that supports a nutrition diagnosis?

  1. Intervention
  2. Signs and symptoms Correct answer.
  3. Etiology
  4. Problem

Explanation

In a PES statement, P is the problem, E is the etiology, and S is the signs and symptoms that provide supporting evidence. The intervention is not part of the diagnostic statement.

Question 38Assessment and Nutrition Diagnosis

A 62-year-old with chronic kidney disease reports poor appetite and early satiety. Which assessment approach best captures both dietary intake and the barriers affecting it?

  1. A food frequency questionnaire alone
  2. A serum creatinine measurement alone
  3. A single 24-hour recall with no follow-up questions
  4. A 24-hour recall combined with a structured appetite and symptom interview Correct answer.

Explanation

Combining a recall with a structured interview links observed intake to the symptoms and barriers driving it. This supports a more accurate etiology in the nutrition diagnosis.

Question 39Assessment and Nutrition Diagnosis

A patient's mid-upper arm circumference is 21 cm. Which interpretation is most appropriate for an adult?

  1. Within the normal reference range
  2. Indicative of obesity
  3. Suggestive of fluid overload
  4. Consistent with depleted muscle and fat reserves Correct answer.

Explanation

A mid-upper arm circumference near 21 cm in adults falls in the low range, suggesting reduced muscle and subcutaneous fat reserves. Values in this range support concern for undernutrition.

Question 40Assessment and Nutrition Diagnosis

Which set of findings best meets a criterion for malnutrition by the global consensus approach?

  1. BMI of 23 kg/m² with stable weight
  2. Isolated low serum albumin with stable weight
  3. Unintentional weight loss of 6 percent in six months Correct answer.
  4. Mild ankle edema alone

Explanation

Unintentional weight loss exceeding 5 percent within six months is one accepted threshold criterion for malnutrition. The other findings lack the required combination of phenotypic or etiologic criteria.

Question 41Assessment and Nutrition Diagnosis

A patient with ascites is being assessed for nutritional status. Which weight-based index is most affected by the ascites?

  1. Handgrip strength
  2. Mid-upper arm circumference
  3. Body mass index calculated from measured weight Correct answer.
  4. Triceps skinfold thickness

Explanation

Ascites adds fluid weight that inflates measured body weight and therefore BMI, masking true nutritional status. Circumferences and skinfolds at the arm are less affected by abdominal fluid.

Question 42Assessment and Nutrition Diagnosis

Which laboratory finding is most consistent with iron deficiency anemia rather than anemia of chronic inflammation?

  1. Elevated ferritin with low transferrin saturation
  2. Low ferritin with elevated total iron-binding capacity Correct answer.
  3. Elevated ferritin with normal hemoglobin
  4. Normal ferritin with normal hemoglobin

Explanation

Iron deficiency typically shows low ferritin and elevated total iron-binding capacity as the body attempts to increase iron uptake. In inflammation, ferritin tends to rise while binding capacity falls.

Question 43Assessment and Nutrition Diagnosis

A patient's 24-hour urine urea nitrogen is used together with dietary protein intake to estimate which parameter?

  1. Creatinine clearance
  2. Lipid absorption
  3. Glycemic variability
  4. Nitrogen balance Correct answer.

Explanation

Nitrogen balance compares nitrogen intake from dietary protein with nitrogen excretion, much of which appears in urine as urea. The comparison indicates whether the patient is in anabolic or catabolic balance.

Question 44Assessment and Nutrition Diagnosis

Which documentation element is essential when writing a nutrition diagnosis statement?

  1. The patient's full medication list
  2. The planned intervention and its monitoring schedule
  3. The problem, its etiology, and the supporting signs and symptoms Correct answer.
  4. The projected length of hospital stay

Explanation

A complete nutrition diagnosis links the identified problem to a specific etiology and to signs and symptoms that provide evidence. This structure guides the selection of an intervention.

Question 45Assessment and Nutrition Diagnosis

A patient's PES statement reads: 'Overweight/obesity related to excessive energy intake as evidenced by BMI 33 kg/m² and 24-hour recall showing 3,200 kcal per day.' Which element is the etiology?

  1. The 24-hour recall data
  2. BMI of 33 kg/m²
  3. Overweight/obesity
  4. Excessive energy intake Correct answer.

Explanation

The etiology is the contributing factor that explains why the problem exists, here excessive energy intake. The problem is the diagnostic label, and the signs and symptoms are the BMI and recall evidence.

Question 46Assessment and Nutrition Diagnosis

Which factor most limits the accuracy of a self-reported food frequency questionnaire in a patient with memory impairment?

  1. Direct observation by the clinician
  2. Overly detailed portion weighing
  3. Recall bias affecting reported habitual intake Correct answer.
  4. Excessive laboratory precision

Explanation

Food frequency questionnaires depend on memory of usual patterns over an extended period, so cognitive impairment introduces recall bias. This reduces the validity of the reported intake.

Question 47Assessment and Nutrition Diagnosis

A patient with a BMI of 17 kg/m² and a 10 percent weight loss over three months has a normal serum albumin. How should the albumin result be interpreted?

  1. It indicates the weight loss was intentional
  2. It confirms adequate protein status
  3. It rules out malnutrition
  4. It does not exclude malnutrition because inflammation and other factors affect albumin Correct answer.

Explanation

Albumin is influenced by inflammation, hydration, and liver function, so a normal value cannot rule out malnutrition. Anthropometric and intake findings remain central to the diagnosis.

Question 48Assessment and Nutrition Diagnosis

Which screening finding most strongly warrants a full nutrition assessment in a hospitalized adult?

  1. Stable weight with a balanced diet
  2. Isolated mild constipation
  3. Recent unintentional weight loss with reduced oral intake Correct answer.
  4. Normal appetite with regular meals

Explanation

Unintentional weight loss combined with reduced intake signals nutritional risk and triggers a comprehensive assessment. Isolated minor symptoms or stable intake do not carry the same priority.

Question 49Assessment and Nutrition Diagnosis

A clinician estimates a patient's energy needs using indirect calorimetry rather than predictive equations. What is the primary advantage of this approach?

  1. It directly measures body fat percentage
  2. It eliminates the need for any dietary assessment
  3. It measures actual oxygen consumption and carbon dioxide production Correct answer.
  4. It replaces the need for biochemical testing

Explanation

Indirect calorimetry derives energy expenditure from measured gas exchange, capturing individual metabolic variation better than population equations. It does not substitute for dietary, anthropometric, or biochemical assessment.

Question 50Assessment and Nutrition Diagnosis

A patient's weight increased by 4 kg over two weeks while energy intake was unchanged and edema developed. What is the most likely explanation?

  1. Fluid accumulation rather than tissue gain Correct answer.
  2. Measurement error only
  3. Genuine fat gain from excess calories
  4. Increased lean muscle mass

Explanation

Rapid weight gain over days to weeks with new edema and unchanged intake most likely reflects fluid retention. True fat or lean tissue gain accrues far more slowly.