101.Keshan disease results from a deficiency of which of the following?

a.copper

b.selenium

c.manganese

d.molybdenum

102.What trace element is part of the enzyme glutathione peroxidase?

a.iron

b.zinc

c.selenium

d.chromium

103.Which of the following is a symptom of selenium toxicity?

a.diarrhea

b.hair loss

c.hemorrhagic effects

d.birth defects

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

a.iron

b.selenium

c.chromium

d.molybdenum

105.Which best describes a free radical?

a.an antioxidant substance that prevents accumulation of cell-damaging oxides

b.a substance in food that interacts with nutrients to decrease their utilization

c.a nutrient in excess of body needs that the body is free to degrade with no consequence

d.a molecule that is unstable and highly reactive because it contains unpaired electrons

106.Which of the following is a characteristic of free radicals?

a.They are destroyed by cigarette smoking.

b.They arise from normal metabolic reactions.

c.They typically stop chain reactions associated with the production of peroxides.

d.They are known to accumulate even in the presence of abundant antioxidant nutrients.

107.Which is the usual term for substances that promote oxidation?

a.pro-oxidants

b.antioxidants

c.free radical generators

d.reactive electron oxidants

108.Which of the following is a characteristic of vitamin C and vitamin E?

a.Both protect against LDL oxidation.

b.Neither reduces arterial inflammation.

c.Neither participates in regulating blood clotting.

d.Both act as pro-oxidants at physiological intakes.