Chapter 8
Which is the most potent form of vitamin k?
Menadione
During early tooth development, vitamin A deficiency leads to enamel hypoplasia and defective dentin formation.
True
Fat-soluble vitamins are A, D, E and K
True
Fat-soluble vitamins are stored in the body
True
Oily fish are considered excellent sources of vitamin D
True
Rickets is caused by vitamin C deficiency.
True
The liver and kidney help convert vitamin D to its active form.
True
Vitamin C is a water soluble vitamin
True
Vitamin C is needed for wound healing.
True
Vitamin D has the potential to become toxic at high levels.
True
Vitamin D toxicity can increase result in confusion, mental changes, and heart rhythm abnormalities.
True
Vitamin E is found in vegetable oils and green leafy vegetables.
True
Vitamin K is derived from bacterial flora and microflora in the gut.
True
Vitamins are organic substances and are necessary for cellular reactions
True
Vitamins do not provide energy
True
When rickets occurs, the alveolar bone is affected similar to other bones in the body.
True
Xerophthalmia occurs with a deficiency of vitamin A.
True
Each is a fat-soluble vitamin, except one. Which is the exception?
Vitamin C
Vitamin A can be stored in the liver for at least
1 year
Which vitamin acts most like a hormone?
D
Large amounts of vitamin A supplements can exceed the storage capacity of the kidneys.
False
Rickets is being diagnosed more frequently in the US
False
The only dietary source of vitamin K is green leafy vegetables.
False
When present in high concentrations, unbound vitamin A causes damage to cell nuclei, especially in the white blood cells
False
An excess of vitamin D causes rickets.
False, a deficiency of vitamin D causes rickets
Animal foods are the principal dietary source of beta-carotene.
False, retinol is obtained from animal foods; beta carotene is found in fruits and veggies
Vitamin K is essential for regulation of blood calcium and phosphorus levels.
False, vitamin K is essential for blood clotting; vitamin D functions to regulate blood calcium and phosphorus levels.
