The first detectable sign of vitamin A deficiency is usually
a. xerosis. b. xerophthalmia.
c. night blindness. d. corneal keratinization.
c
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Linoleic acid, an omega-6 fatty acid, is converted by the body into
A. oleic acid. B. palmitic acid. C. arachidonic acid. D. alpha-linolenic acid.
Scientists who investigate lifestyle factors that influence the prevalence of obesity among different population groups are conducting a(n) ________ study.
A. epidemiological B. technological C. in vitro D. pathological
Which two minerals need special attention in the diets of all vegetarians?
a. Iodine and iron b. Iron and zinc c. Calcium and phosphorus d. Magnesium and sodium e. Potassium and manganese
Which of the following individuals is most likely to need a dietary supplement?
a. Renee, a 28-year-old woman who is pregnant and follows a vegetarian diet b. Sam, who is overweight by about 20 lbs. and has been increasing his physical activity and decreasing his calorie intake c. Pamela, a 48-year-old woman who is entering menopause, exercises regularly, and eats a balanced diet d. Carlos, a college junior with a full course load who is active in his fraternity leadership and is trying to gain muscle mass