Mixed Deck — All Clinical Nutritionist CCN Topics Flashcards

Zinc deficiency is characteristically associated with which clinical finding?

Answer: Impaired taste and smell (hypogeusia/anosmia)

Zinc deficiency causes hypogeusia (reduced taste acuity), anosmia, poor wound healing, growth retardation, and immune dysfunction.

Which nutrient keeps calcium in tact?

Answer: D

Food does not contain a lot of vitamin D. Although it is created by exposure to sunlight, many individuals do not get enough vitamin D. This vitamin is crucial for preserving blood calcium levels.

The Malnutrition Universal Screening Tool (MUST) incorporates which three components to assess malnutrition risk?

Answer: BMI, unintentional weight loss, and acute disease effect

MUST scores BMI (0-2), percentage unintentional weight loss over 3-6 months (0-2), and acute disease effect (0 or 2), with total score guiding intervention.

Which amino acid is considered the primary precursor for the neurotransmitter serotonin?

Answer: Tryptophan

Tryptophan is converted to 5-hydroxytryptophan (5-HTP) and then to serotonin via two enzymatic steps requiring vitamin B6 and other cofactors.

Which dietary intervention is first-line therapy for managing non-alcoholic fatty liver disease (NAFLD)?

Answer: 5-10% body weight reduction through caloric restriction and increased physical activity

A 5-10% reduction in body weight through lifestyle modification is the most effective intervention for improving liver histology, reducing hepatic steatosis, and decreasing inflammation in NAFLD.

Phosphatidylcholine is a major membrane phospholipid that also serves as a precursor for which neurotransmitter?

Answer: Acetylcholine

Choline from phosphatidylcholine is a direct precursor for acetylcholine synthesis in cholinergic neurons; adequate dietary choline is essential for cognitive function and neuromuscular transmission.

Beriberi, caused by thiamine deficiency, has two main forms. Which type is characterized by cardiovascular symptoms and edema?

Answer: Wet beriberi

Wet beriberi involves high-output cardiac failure, cardiomegaly, and peripheral edema due to impaired thiamine-dependent energy production in cardiac muscle.

N-acetylcysteine (NAC) is used as a supplement primarily because it is a precursor to which endogenous antioxidant?

Answer: Glutathione (GSH)

NAC provides cysteine, the rate-limiting substrate for glutathione synthesis, replenishing this critical intracellular antioxidant and detoxification cofactor.

In type 2 diabetes management, what is the glycemic index (GI), and how is it used clinically?

Answer: A ranking of carbohydrate foods based on their effect on blood glucose compared to pure glucose (GI=100)

GI ranks foods on a 0-100 scale based on their postprandial blood glucose response relative to glucose; choosing low-GI foods can improve glycemic control in diabetes.

A clinical nutritionist sees a patient with glossitis, angular stomatitis, and a 'magenta tongue.' Which deficiency is suspected?

Answer: Riboflavin (vitamin B2)

Riboflavin deficiency (ariboflavinosis) presents with oral-ocular-genital syndrome including angular stomatitis, cheilosis, glossitis, and corneal vascularization.

In pediatric nutrition, what is the primary purpose of using medium-chain triglycerides (MCT) oil in formulas for fat malabsorption?

Answer: MCTs are absorbed directly into the portal vein without requiring bile acid emulsification or chylomicron formation

Unlike long-chain fatty acids, MCTs (C8-C10) are absorbed directly into the portal circulation without needing bile salt micelles, lymphatic transport, or chylomicron assembly, benefiting patients with cholestasis or lymphatic disorders.

Which of the following describes a breastfeeding woman's sufficient water intake?

Answer: 3.8 L/day

For breastfeeding, 3.8 L of water per day is the appropriate intake (AI). Drinking water is the ideal type of water. All sorts of beverages rank as the second-best source.

Who has expertise in diets and foods?

Answer: Dieticians

Dietitians are specialists who are trained in the field of nutrition and dietetics. They are experts in food and nutrition and provide guidance and advice on healthy eating, meal planning, and managing specific dietary needs or conditions. Dietitians work with individuals or groups to assess their nutritional needs, develop personalized diet plans, and provide education on proper nutrition and healthy eating habits. They may work in various settings such as hospitals, clinics, schools, research institutions, or private practice. Dietitians play a crucial role in promoting good health and preventing and managing diseases through proper nutrition and dietary interventions.

Which precursor is required for endogenous synthesis of carnitine, essential for mitochondrial fatty acid transport?

Answer: Lysine and methionine, with cofactors vitamin C, B6, niacin, and iron

Carnitine is synthesized from lysine and methionine through a pathway requiring ascorbate, iron, pyridoxal phosphate, and niacin; deficiency impairs long-chain fatty acid entry into mitochondria.

Which metabolic process converts amino acids to keto acids and transfers the amino group to alpha-ketoglutarate?

Answer: Transamination

Transamination transfers an amino group from an amino acid to alpha-ketoglutarate, forming glutamate and the corresponding keto acid, catalyzed by aminotransferases.

Except for the following, every suggestion for food treatment in a baby with ketosis is:

Answer: High-protein foods

For a newborn with ketosis, diet treatment may be required for the rest of their lives to prevent episodes of acidity. Although the nutrients and calories young newborns consume are important for their physical and mental development, how and when these nutrients and calories are given to them also affects their psychosocial development.

All of the following should be carried out, with the exception of:

Answer: Do not wear gloves with any hand wound

Naturally, preparing meals at the proper temperature and avoiding prolonged standing at temperatures between 40 and 140 degrees F. You should obviously stop known carriers from cooking food.

Which dietary polyphenol found in grapes and red wine has been studied for activating sirtuins and mimicking caloric restriction effects?

Answer: Resveratrol

Resveratrol activates SIRT1 (a deacetylase sirtuin) and AMPK, producing effects similar to caloric restriction including improved mitochondrial function and metabolic regulation.

Which metabolic pathway converts pyruvate to acetyl-CoA, linking glycolysis to the citric acid cycle?

Answer: Pyruvate dehydrogenase reaction

The pyruvate dehydrogenase complex irreversibly converts pyruvate to acetyl-CoA, bridging glycolysis and the TCA cycle.

According to the Dietary Reference Intakes (DRIs), which value represents the average daily intake level sufficient to meet the nutrient requirement of half of all healthy individuals?

Answer: Estimated Average Requirement (EAR)

The EAR meets the requirements of 50% of individuals, while the RDA is set to cover 97–98% of the population.