Which of the following is a characteristic of iron utilization?
a. Most of the body's iron is recycled
b. The chief storage site for iron is the intestinal epithelium
c. Iron is absorbed better from supplements than from foods
d. Iron from nonheme food sources is absorbed better than that from heme food sources
e. Vegetarians need 4 times the iron as non-vegetarians.
ANS: A
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Georgiana is concerned about her daily intake of folate. Which of the following sources has the more bioavailable form of folate?
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.
Bill is a 60-year-old male. Lately, he has been having trouble sleeping and finds himself falling asleep at odd times. Bill's doctor states that he is healthy and does not have any diseases. His disturbed sleeping pattern is most likely due to a physiological change in his _____ associated with aging
A) nervous system B) endocrine system C) urinary system D) respiratory system
Amino acids that cannot be made in adequate amounts by the body and must be consumed in the diet are called:
1.nonessential amino acids. 2.dispensable amino acids. 3.essential amino acids. 4.necessary amino acids.