51.While researching your southern family history, you find that your grandmother had a sister who died fairly young. The symptoms leading up to her death included diarrhea, dermatitis, and dementia. Because the family led a poor, corn-farming existence, you suspect this relative died of which of the following diseases?

a.scurvy

b.cancer

c.pellagra

d.beriberi

52.Which of the following substances is found in corn and contributes to the development of pellagra?

a.avidin

b.leucine

c.phytate

d.phenylalanine

53.Which of the following terms identifies the characteristic tingling sensations and reddening of the skin after ingesting a pharmacologic dose of nicotinic acid?

a.niacin flush

b.NAD dermatitis

c.niacin erythrema

d.bilateral niacin inflammation

54.Which of the following overt side effect(s) is likely to appear after a person ingests a high quantity of nicotinic acid?

a.constipation

b.mental confusion

c.painful, tingling, itching sensation

d.hair loss, bloating, and photophobia

55.When taken in large doses, which of the following vitamins is associated with liver injury and peptic ulcers?

a.niacin

b.thiamin

c.vitamin B₆

d.vitamin B₁₂

56.Large doses of nicotinic acid are known to result in which of the following?

a.decreased LDL cholesterol

b.decreased HDL cholesterol

c.lowered adiponectin

d.disappearance of learning disorders in children

57.At one point in time, researchers believed that pellagra was caused by which one of the                                           following?

a.exposure to the sun

b.an infection

c.dehydration

d.fatigue

58.Your friend Jane just returned from the doctor who diagnosed her with a specific vitamin B toxicity. However, she doesn’t recall the name of the vitamin. Which of the following is the only possible culprit associated with toxicity symptoms?

a.niacin

b.biotin

c.riboflavin

d.vitamin B₁₂

59.What is the approximate niacin RDA for adults?

a.10 niacin equivalents

b.35 niacin equivalents

c.20 niacin equivalents

d.30 niacin equivalents

60.Which of the following foods would be the best source of niacin equivalents?

a.milk

b.broccoli

c.chicken

d.strawberries