Question 1

A person ingesting large amounts of thyroid antagonist substances is at high risk of developing

Accepted Answer

A)  cretinism.
B)  simple goiter.
C)  high blood T3 levels.
D)  high blood thyroxine levels.E) B) and C)
F) A) and D)

Question 2

Which of the following is known to enhance iron absorption?

Accepted Answer

A)  Tea
B)  Coffee
C)  Foods containing vitamin C
D)  Foods containing vitamin EE) None of the above
F) A) and C)

Question 3

Which of the following is known to regulate the absorption of zinc?

Accepted Answer

A)  Metallothionein in the intestinal cells
B)  Zinc-releasing enzymes in the intestinal mucosa
C)  Pancreatic juice containing zinc-absorption enhancers
D)  Bile acids which form a complex with zinc to promote its absorptionE) A) and B)
F) None of the above

Question 4

Which of the following would be the most appropriate food source of iodide for a person who lives inland?

Accepted Answer

A)  Fresh-water fish
B)  Iodized table salt
C)  Locally grown produce
D)  Plants of the cabbage familyE) A) and B)
F) A) and C)

Question 5

What is the optimal fluoride concentration in community water supplies?

Accepted Answer

A)  1 ppm
B)  2 ppm
C)  2.5 ppm
D)  4 ppmE) All of the above
F) B) and D)

Question 6

Which of the following nutrients has functions similar to those of vitamin E?

Accepted Answer

A)  Iron
B)  Selenium
C)  Chromium
D)  MolybdenumE) None of the above
F) B) and D)

Question 7

Which of the following foods are known to contain goitrogens?

Accepted Answer

A)  Shellfish
B)  Whole grains
C)  Cauliflower and broccoli
D)  Blueberries and raspberriesE) B) and C)
F) A) and D)

Question 8

Which of the following is a characteristic of iron deficiency?

Accepted Answer

A)  Blood erythrocyte protoporphyrin levels decline as anemia worsens
B)  Iron supplements are not as effective at treating anemia as is proper nutrition
C)  People with anemia generally become fatigued only when they exert themselves
D)  The concave nails of iron-deficiency anemia result from abnormal ferritin levelsE) A) and C)
F) B) and C)

Question 9

All of the following are considered heavy metals except

Accepted Answer

A)  iron.
B)  lead.
C)  mercury.
D)  cadmium.E) A) and B)
F) A) and C)

Question 10

To serve its function in oxygen delivery to body tissues, iron must interact closely with

Accepted Answer

A)  copper and vitamin C.
B)  selenium and iodine.
C)  zinc and vitamin A.
D)  chromium and calcium.E) C) and D)
F) B) and C)

Question 11

Which of the following would be the minimum amount of dietary iron known to impair zinc absorption in an individual with a zinc intake of 15 mg?

Accepted Answer

A)  5 mg
B)  15 mg
C)  30 mg
D)  60 mgE) None of the above
F) All of the above

Question 12

Which of the following is a common example of iron contamination in the diet?

Accepted Answer

A)  Using an iron skillet to scramble eggs can triple their iron content
B)  Cooking acidic foods in a copper pot can extract chelate iron from the pot
C)  Simmering acidic foods in glass dishes leads to leaching of iron salts from the glass
D)  Cooking leafy vegetables in a galvanized pot leads to a six-fold increase in iron contentE) C) and D)
F) All of the above

Question 13

Which of the following does not have an RDA?

Accepted Answer

A)  Iron
B)  Zinc
C)  Iodine
D)  FluorideE) None of the above
F) A) and C)

Question 14

What mineral is part of vitamin B12?

Accepted Answer

A)  Copper
B)  Cobalt
C)  Nickel
D)  VanadiumE) B) and D)
F) None of the above

Question 15

What is the Tolerable Upper Intake Level for copper?

Accepted Answer

A)  1 mg
B)  2.5 mg
C)  7.5 mg
D)  10 mgE) A) and B)
F) B) and D)

Question 16

Which of the following mechanisms explains why fluoride is effective in controlling tooth decay?

Accepted Answer

A)  It helps regulate calcium levels in saliva
B)  It helps form decay-resistant fluorapatite
C)  It inhibits growth of decay-producing bacteria
D)  It changes the pH of the mouth, inhibiting bacterial growthE) A) and B)
F) None of the above

Question 17

Which of the following is a property of selenium in nutrition?

Accepted Answer

A)  It participates in the functioning of insulin
B)  Severe deficiency is associated with heart disease in China
C)  Significant food sources include dairy and unprocessed vegetables
D)  It has no RDA but the estimated safe and adequate dietary intake is only 2-3 μg/dayE) None of the above
F) All of the above

Question 18

What percentage of the iron in a hamburger is nonheme iron?

Accepted Answer

A)  0
B)  20
C)  40
D)  60E) C) and D)
F) A) and B)

Question 19

What trace element is part of the enzyme glutathione peroxidase?

Accepted Answer

A)  Iron
B)  Zinc
C)  Selenium
D)  ChromiumE) A) and B)
F) A) and C)

Question 20

Approximately how much iodized salt must be consumed to meet but not exceed the RDA for iodine?

Accepted Answer

A)  1 mg
B)  ½ teaspoon
C)  1 teaspoon
D)  1 tablespoonE) B) and D)
F) A) and B)

Exam 13: The Trace Minerals

What is the optimal fluoride concentration in community water supplies?

Correct AnswerverifiedShow Answer

What is the Tolerable Upper Intake Level for copper?

Correct AnswerverifiedShow Answer

Which of the following mechanisms explains why fluoride is effective in controlling tooth decay?

Correct AnswerverifiedShow Answer

What trace element is part of the enzyme glutathione peroxidase?

Correct AnswerverifiedShow Answer

Which of the following would be the most appropriate food source of iodide for a person who lives inland?

Correct AnswerverifiedShow Answer

To serve its function in oxygen delivery to body tissues, iron must interact closely with

Correct AnswerverifiedShow Answer

Which of the following is known to enhance iron absorption?

Correct AnswerverifiedShow Answer

Which of the following does not have an RDA?

Correct AnswerverifiedShow Answer

What mineral is part of vitamin B12?

Correct AnswerverifiedShow Answer

All of the following are considered heavy metals except

Correct AnswerverifiedShow Answer

What percentage of the iron in a hamburger is nonheme iron?

Correct AnswerverifiedShow Answer

Which of the following is a characteristic of iron deficiency?

Correct AnswerverifiedShow Answer

Which of the following nutrients has functions similar to those of vitamin E?

Correct AnswerverifiedShow Answer

A person ingesting large amounts of thyroid antagonist substances is at high risk of developing

Correct AnswerverifiedShow Answer

Which of the following is a property of selenium in nutrition?

Correct AnswerverifiedShow Answer

Approximately how much iodized salt must be consumed to meet but not exceed the RDA for iodine?

Correct AnswerverifiedShow Answer

Which of the following is known to regulate the absorption of zinc?

Correct AnswerverifiedShow Answer

Which of the following foods are known to contain goitrogens?

Correct AnswerverifiedShow Answer

Which of the following would be the minimum amount of dietary iron known to impair zinc absorption in an individual with a zinc intake of 15 mg?

Correct AnswerverifiedShow Answer

Which of the following is a common example of iron contamination in the diet?

Correct AnswerverifiedShow Answer

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What mineral is part of vitamin B₁₂?

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