Kayla was a participant in a clinical study to determine how much vitamin C cures scurvy, the vitamin's deficiency disease. During the study, Kayla consumed only a formula diet that was nutritionally complete, except it didn't contain vitamin C. Within a few weeks, Kayla developed scurvy. At that point, researchers gave 2 mg vitamin C to Kayla each day for a week, but her signs and symptoms of scurvy remained. In the weeks that followed, the scientists continued to increase Kayla's intake of the vitamin by 2 mg/week. After a week of taking 10 mg of vitamin C/day, Kayla reported feeling much better. Based on this information, the researchers concluded that Kayla's
A. EER for vitamin C was about 10 mg.
B. AI for vitamin C was 100 mg, which was 10 times the amount that cured her case of scurvy.
C. requirement for vitamin C was 10 mg.
D. RDA for vitamin C was 10 mg, plus 15 mg as a margin of safety.
Answer: C
You might also like to view...
The macronutrient class that is important for structural aspects of the body (such as muscle and bone) and also helps to maintain the immune system is
A. carbohydrate. B. protein. C. lipid. D. fat.
Urea is excreted from the body by
a. urine b. sweat c. blood d. a and b e. a, b, and c
Which of the following statements is true?
A. Most obese children "grow out" of the condition by the time they reach adulthood. B. Puberty is the life stage that marks the beginning of childhood. C. According to a recent survey, almost 22% of American high school students did not drink milk during the week prior to the survey. D. Adolescent boys usually experience their growth spurt at a younger age than adolescent girls.
Which of the following is true about protein as an energy source?
A. Protein and amino acid supplements are needed as energy sources for weight lifters. B. The use of protein as an energy source is greater for endurance athletes than for those who body build or lift weights. C. Protein is a good energy source, supplying 7 kcal per gram. D. Protein is more important than carbohydrate as an energy source for muscular activity.