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HNF 462
exam 2
17
Other
Undergraduate 4
10/31/2008

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Term
 Biotin forms part of structure of
certain

Definition
carboxylase enzymes
Term
Involved in ________ reactions
Definition
carboxylation and
decarboxylation
Term
Sign/symptoms in humans of biotin deficiency:
Definition
  • dermatitis
  • Alopecia (hair loss )
  • depression
  • muscle pains
  • changes in EKG
Term
Biotin Food sources
Definition
  • Found in many foods
  • liver and kidney
  • milk
  • egg yolk
  • brewer’s yeast
Term
Choline Toxicity:
Definition
High doses (10 to 16 grams/day)
of choline have been associated
with
fishy body odor,
vomiting, and
increased sweating
Term
Function of Choline:
Definition
  • Constituent of lecithin
  • Important in membrane structure and function
  • important in lipoprotein transport
Term
Vitamin A in foods is usually in the form of
Definition
retinyl esters
Term
Absorption of vitamin A:
Definition
  • Requires bile, digestive enzymes, integration
into micelles
  • Depends on the fat in the diet
  • 90% of natural retinoids can be absorbed
Term
One of the earliest symptoms of vit. A deficiency is
Definition
Night Blindedness
Term
Vitamin A deficiency is the most
common ______ in many
parts of the world
Definition
cause of blindness
Term
Vitamin E _____ function as a coenzyme
Definition
Does Not
Term
vitamin E
is cellular _____
Definition
antioxidant
Term
Vit E may reduce
Definition
- secretion of proinflammatory
factors by immune cells
-reduce oxidation of lipids
Controversy of
vitamin E and statin?
2000 DRI for vitamin E
(RRR-alpha-tocopherol)
Covered
Term
dietary vitamin K is absorbed
Definition
80%
Term

Vitamin K1 is ____  and
found in plant foods like_____.
Definition
phyloquinone,alfalfa and
broccoli
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