Exam 8: Vitamins Required for Calcified Structures

Each is true of rickets,except one.Which is the exception?

Dental hygienists should advocate that fortified foods and vitamin supplements be used judiciously because chronic use in excess of the RDA can result in severe,life-threatening liver damage.

Each correlation between vitamin D and sun exposure is accurate,except one.Which is the exception?

Each is true of vitamin requirements and deficiencies,except one.Which is the exception?

Studies suggest that leukoplakia is caused by excess vitamin A (a fat-soluble vitamin),retinoids,and beta-carotene.Leukoplakia is an erythematous lesion that appears on the lateral borders of the tongue.

Osteoporosis is characterized by fragile bones and is associated with an increased incidence of bone fractures.Current research indicates that osteoporosis is caused primarily by a deficiency of water-soluble vitamins.

Vitamin K is derived from bacterial flora and microflora in the gut.The only dietary source of vitamin K is green leafy vegetables.

Fat-soluble vitamins are fairly stable when heated,as in cooking.In contrast to water-soluble vitamins,fat-soluble vitamins contain nitrogen.

Supplementing dietary intake of beta-carotene is advised for patients with leukoplakia who smoke because research documents that exogenous beta-carotene protects lung tissues from dangers of smoking.

Inadequate intake of vitamin A occurs in lower socioeconomic groups because these individuals often lack resources to purchase and consume vegetables and fruits.

Oily fish are considered excellent sources of vitamin D.Which is NOT considered an oily fish?

Each is true of osteomalacia,except one.Which is the exception?

Rickets is no longer prevalent in the United States because increased breastfeeding provides ample vitamin D reserves.

Fat-soluble vitamins are different from water-soluble vitamins because the body is able to store only small amounts of fat-soluble vitamins.

Which is the most potent form of vitamin K?

Each form of vitamin A is involved in the prevention of night blindness,except one.Which is the exception?

Hypercarotenemia may be distinguished from jaundice because the sclera of the eye retains its normal white color in hypercarotenemia.

Follicular hyperkeratosis,in which the skin is thickened,dry,and wrinkled,is preceded by hypervitaminosis A.The keratinization of this disorder can also affect the oral mucosa and the respiratory and gastrointestinal tracts.

Each is a function of vitamin A,except one.Which is the exception?

It is postulated that vitamin D deficiency is linked to enamel hypoplasia and dental decay because deficiency in vitamin D results in deep narrow occlusal grooves.