$\mathrm{RDA}_{\text{Fluoride}} = 3-4\ \mathrm{mg}$

$\mathrm{RDA}_{\text{Iodine}} = 150\ \mathrm{\mu g}$

Question 1

Which of the following is a primary function of fluoride in the human body?

Accepted Answer

Promotes dental enamel resistance to caries

Question 2

A child presents with multiple dental caries and white spots on their teeth. Which dietary deficiency is most likely responsible?

Accepted Answer

Insufficient fluoride intake

Question 3

Which food source is the best dietary provider of fluoride?

Accepted Answer

Fluoridated municipal water

Question 4

What is the main health risk associated with excessive fluoride intake?

Accepted Answer

Dental fluorosis

Question 5

Which of the following equations correctly represents the recommended dietary allowance (RDA) for fluoride in adults?

Accepted Answer

$\mathrm{RDA}_{	ext{Fluoride}} = 3-4\ \mathrm{mg}$

Question 6

Iodine is necessary for the synthesis of which hormone?

Accepted Answer

Thyroid hormone

Question 7

A population with insufficient iodine intake is most at risk for developing which condition?

Accepted Answer

Goiter

Question 8

Which of the following is a major dietary source of iodine?

Accepted Answer

Iodized salt

Question 9

Which equation represents the recommended dietary allowance (RDA) for iodine in adults?

Accepted Answer

$\mathrm{RDA}_{	ext{Iodine}} = 150\ \mathrm{\mu g}$

Question 10

Which of the following conditions is prevented through the use of iodized salt?

Accepted Answer

Goiter and congenital hypothyroidism

Question 11

A patient presents with an enlarged thyroid gland and symptoms of hypothyroidism. Which trace mineral deficiency is most likely responsible?

Accepted Answer

Iodine

Question 12

Which of the following is a function of iodine?

Accepted Answer

Thyroid hormone synthesis

Question 13

A community switches from well water to fluoridated municipal water. What is the most likely health benefit observed over time?

Accepted Answer

Reduced incidence of dental caries

Question 14

Which of the following statements about fluoride absorption is correct?

Accepted Answer

Fluoride is absorbed directly into teeth and gums

Question 15

A patient has excessive intake of iodized salt. What is the most likely health consequence?

Accepted Answer

Impaired thyroid hormone production

Question 16

Which of the following scenarios best illustrates the impact of insufficient fluoride intake?

Accepted Answer

An adult experiences increased dental caries after switching to non-fluoridated bottled water

Question 17

Which of the following is NOT a consequence of iodine deficiency?

Accepted Answer

Dental caries

Question 18

If a population's main water source is not fluoridated, which public health intervention would most effectively reduce dental caries?

Accepted Answer

Implement community water fluoridation

Question 19

Which of the following best explains why fruits and vegetables are not considered excellent sources of fluoride?

Accepted Answer

The fluoride in fruits and vegetables is not in a readily absorbed form

Question 20

A newborn is diagnosed with congenital hypothyroidism. Which maternal dietary deficiency during pregnancy is most likely responsible?

Accepted Answer

Iodine

Trace Minerals: Fluoride and Iodine – Functions, Sources, Deficiency, and Toxicity

Study Guide - Practice Questions