Shared Flashcard Set

Details

HUN 1201 - CH. 10
N/A
14
Nutrition
Undergraduate 1
05/01/2013

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Cards

Term
What are antioxidants?
Definition
Substances that prevent or repair damage from oxidation
Term
What are free radicals?
Definition
Highly unstable atoms with unpaired electrons.
Term
Enzyme systems
Definition

superoxide dismutase

catalase

glutathione peroxide

Term
How do antioxidants repair free radicals?
Definition
They stabilize free radicals by donating their electrons or hydrogen atoms.
Term
What do antioxidant minerals do?
Definition
convert free radicals into less harmful substances.
Term
What does Vit. E do as an antioxidant?
Definition
Vitamin E acts as an antioxidant by donating an electron to free radicals, more specifically protecting PUFAs and LDLs.
Term
How does Vit. C assist Vit. E?
Definition
Replaces Vit. E's lost electrons after it donates some to free radicals.
Term
What happens to atoms during oxidation?
Definition
They lose electrons
Term
What does Vit. E specifically protect?
Definition
The lungs, PUFAs and LDLs
Term
Why should be consume enough Vit. E?
Definition
To prevent enthrocyte hemolysis
Term
Vitamin C assists in the synthesis of...
Definition
collagen
Term
How does dehydroascorbic acid return to being an antioxidant?
Definition
It gains an electron from Glutathione
Term
3 Forms of Vitamin A
Definition

Retinol (alcohol)

Retinal (aldehyde)

Retinoic acid (acid)

Term
Vitamin A is essential to...
Definition
sight
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