Trivia Flashcards
7 cards from real ACBN practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Trivia flashcards as text
Which macronutrient provides the most calories per gram?
Answer: Fat (9 kcal/g)
Fat provides 9 kcal per gram, making it the most energy-dense macronutrient, more than double that of carbohydrates or protein.
The body's preferred fuel for the brain under normal dietary conditions is:
Answer: Glucose
The brain relies almost exclusively on glucose for fuel under normal (non-fasting) conditions because fatty acids cannot cross the blood-brain barrier.
Which food label claim requires that a product contain no more than 0.5 g of fat per serving according to FDA regulations?
Answer: Fat free
The FDA defines 'fat free' as containing less than 0.5 g of fat per serving, allowing trace amounts that round to zero.
Pellagra is a niacin deficiency disease classically characterized by the 'four Ds': dermatitis, diarrhea, dementia, and which fourth condition?
Answer: Death
Untreated pellagra progresses to the fourth 'D' — death — making early identification and niacin repletion critical.
Which hormone, secreted by adipose tissue, signals satiety to the hypothalamus and helps regulate long-term energy balance?
Answer: Leptin
Leptin is released by fat cells in proportion to fat mass and suppresses appetite by acting on hypothalamic receptors to signal fullness.
Bioavailability of a nutrient refers to:
Answer: The proportion of a nutrient absorbed and used by the body
Bioavailability describes what fraction of an ingested nutrient is actually absorbed from the gut and available for physiological use.
The essential fatty acid linoleic acid belongs to which omega family?
Answer: Omega-6
Linoleic acid (18:2n-6) is an omega-6 essential fatty acid that the body cannot synthesize and must obtain from vegetable oils, nuts, and seeds.