Clinical Nutritionist CCN General 5 — Questions and Answers
Question 1: A CCN working with an athlete recommends a carbohydrate-to-protein ratio of approximately 3:1 or 4:1 immediately post-exercise. What is the primary goal of this recommendation?
- Maximize fat oxidation during recovery
- Promote muscle protein synthesis and glycogen resynthesis simultaneously (Correct answer)
- Prevent exercise-induced hypoglycemia during training
- Reduce cortisol by limiting protein intake
Correct answer: Promote muscle protein synthesis and glycogen resynthesis simultaneously
A carbohydrate-to-protein ratio of 3:1–4:1 post-exercise optimally stimulates insulin release for glycogen replenishment while providing amino acids for muscle protein synthesis.
Question 2: Which vitamin is required for the post-translational carboxylation of clotting factors II, VII, IX, and X?
- Vitamin A
- Vitamin C
- Vitamin E
- Vitamin K (Correct answer)
Correct answer: Vitamin K
Vitamin K is the essential cofactor for gamma-carboxylation of glutamate residues on coagulation factors, activating them for clot formation.
Question 3: A nutritionist assesses a 70-year-old client and finds low serum 25-hydroxyvitamin D despite adequate reported sun exposure. Which age-related change most likely explains this finding?
- Increased renal clearance of vitamin D metabolites
- Decreased skin capacity to synthesize vitamin D3 from 7-dehydrocholesterol (Correct answer)
- Reduced intestinal absorption of vitamin D from food
- Increased conversion of vitamin D to inactive metabolites in the liver
Correct answer: Decreased skin capacity to synthesize vitamin D3 from 7-dehydrocholesterol
Aging reduces skin concentration of 7-dehydrocholesterol, significantly impairing cutaneous vitamin D synthesis even with adequate UV exposure.
Question 4: In a patient with Type 2 diabetes, a clinical nutritionist recommends distributing carbohydrate intake evenly throughout the day. What is the primary rationale?
- To maximize insulin secretion after each meal
- To prevent large postprandial glucose excursions and improve glycemic control (Correct answer)
- To increase total daily carbohydrate intake for energy needs
- To reduce the need for dietary fiber supplementation
Correct answer: To prevent large postprandial glucose excursions and improve glycemic control
Spreading carbohydrate intake evenly across meals reduces the magnitude of postprandial glucose spikes, supporting better overall blood glucose management.
Question 5: Which condition is most directly caused by inadequate dietary iodine?
- Pellagra
- Beriberi
- Goiter and hypothyroidism (Correct answer)
- Rickets
Correct answer: Goiter and hypothyroidism
Iodine is required for thyroid hormone synthesis; deficiency leads to thyroid gland enlargement (goiter) and reduced thyroid hormone production (hypothyroidism).
Question 6: A CCN reviewing a client's labs notices a serum albumin of 2.8 g/dL. How should this value be interpreted?
- Normal nutritional status
- Mild protein-energy malnutrition
- Moderate to severe protein deficiency or inflammatory state (Correct answer)
- Overhydration artifact only
Correct answer: Moderate to severe protein deficiency or inflammatory state
Serum albumin below 3.0 g/dL indicates moderate-to-severe malnutrition or an acute phase response, though its long half-life (~20 days) limits sensitivity to acute changes.
Question 7: Which of the following best describes the concept of nutrient bioavailability?
- The total amount of a nutrient present in a food before cooking
- The proportion of an ingested nutrient that is absorbed and utilized by the body (Correct answer)
- The recommended daily intake of a nutrient for healthy adults
- The nutrient density of a food expressed per 100 calories
Correct answer: The proportion of an ingested nutrient that is absorbed and utilized by the body
Bioavailability refers to the fraction of an ingested nutrient that is absorbed into systemic circulation and available for physiological use.
Clinical Nutritionist CCN General 5
A CCN working with an athlete recommends a carbohydrate-to-protein ratio of approximately 3:1 or 4:1 immediately post-exercise.
What is the primary goal of this recommendation?