Chapter 8

Vitamin A can be stored in the liver for at least:

1 year

Alopecia, diplopia, and increased activity of osteoclasts are most associated with an excess of which vitamin?

Vitamin A

Each is true of vitamin requirements and deficiencies, except:

although nutrients rely on each other for utilization, they are not considered codependent

Each is accurate regarding the relationship between vitamin D and periodontitis, except:

although vitamin D had been found to affect alveolar positively, and effect on wound healing has not been observed

Large amounts of vitamin A supplements can exceed the storage capacity of the kidneys. when present is high concentrations, unbound vitamin A cell damage to cell nuclei, especially in the white blood cells and lysosomes.

both statements are false

When rickets occurs, the alveolar bone is affected similar to other bones in the body. The trabeculae of the alveolar bone is also weaken,

both statements are true

In older patients, Vitamin D deficiency frequently results in falls because this deficiency is associated with muscle weakness.

both the statement and the reason are correct and related

Oily fish are considered excellent sources of Vitamin D, which is not conserved an oily fish?

cod

Each is true of vitamin D, except:

diets low in fiber result in less vitamin D absorption

Each is true of xeropthalmia, except:

it stimulated secretion of tears and causes light sensitivity

Each is the function of vitamin A, except:

maintenance of more than 200 genes

Antioxidants prevent cell membrane damage by free radicals that are produced by cells and tissue using free oxygen. Research conclusively documents that the antioxidant beta-carotene is effective in preventing cancer.

the first statement is true; the second is false

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

the first statement is true; the second is false

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

the first statement is true; the second is false

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

the statement is correct, but the reason is not correct

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

the statement is correct, but the reason is not correct

Most milk in the U.S. is fortified because the calcium and phosphorus content is beneficial for absorption and use of vitamin A.

the statement is correct, but the reason is not correct

Each is a fat-soluble vitamin, except:

vitamin C

Which vitamin acts most like a hormone?

vitamin D

Each is true of Vitamin K, except:

vitamin K absorption increases with high levels of vitamin E supplementation