What is currently known about fluoride in drinking water supplies?
a. All bottled water contains fluoride added as part of the bottling process.
b. Scientific evidence has shown that communities with fluoridated water have higher cancer rates.
c. Very few communities in the U.S. have fluoridated water.
d. In communities where fluoride is lacking in the water there is a high dental decay rate.
e. Where the water supply contains too little fluoride, discoloration of the teeth occurs due to fluorosis.
Q. 2Which statement about selenium levels in the body is accurate?
a. Men with high blood levels of selenium from taking supplements have decreased cancer risk.
b. Many healthy, well-fed people have a hidden selenium deficiency.
c. There is no danger of toxicity when taking selenium supplements.
d. It is difficult to obtain enough selenium from foods in the diet.
e. Selenium works with a group of enzymes to protect body compounds from oxidative damage.
Q. 3You are working with a child in a health clinic who has growth retardation, impaired immunity, and a poor appetite. This child is most likely experiencing ____ deficiency.
a. iron
b. chromium
c. zinc
d. magnesium
e. sodium
Q. 4What effect does zinc deficiency have on the body?
a. a minor effect because zinc has only a limited role in the body
b. impairs the immune response, leading to increased infections
c. increases metabolism and increases appetite, leading to weight gain
d. reduces iron absorption because iron needs zinc for transport
e. increases hair growth and red blood cell breakdown
Q. 5Your best friend complains that she is tired all of the time and has a problem concentrating. In addition, she likes to chew ice. Which of the following is your friend likely to have?
a. potassium deficiency
b. zinc deficiency
c. magnesium deficiency
d. iron deficiency
e. sodium deficiency
Q. 6Do high intakes of iron from foods pose a danger to healthy people?
a. Yes, if they include large amounts of fortified grains and cereals.
b. No, because the body adjusts the amount of iron absorbed.
c. Yes, because of high intakes of vitamin C supplements among many people.
d. No, because non-heme iron blocks the absorption of heme iron.
e. Yes, because iron toxicity is a relatively common occurrence.
Q. 7When trying to consume adequate dietary iron, it is helpful to:
a. eat non-heme iron found only in plants because it is absorbed more efficiently.
b. consider adding supplements because they are better absorbed than iron in foods.
c. combine vitamin C-rich foods with non-heme iron sources to increase absorption.
d. avoid combining heme-iron foods with non-heme-iron foods in the same meal.
e. combine vitamin C-rich foods with heme iron sources to increase absorption.
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