Chat with AIExam 8: Nutrients Involved in Antioxidant Function
Which of the following would NOT be a good strategy for increasing vitamin C in the diet?
(88) 
VerifiedA
List one antioxidant mineral, where it is stored in the body, and its primary dietary source.
(83) VerifiedSelenium is a trace mineral that functions as an antioxidant. It is stored as part of amino acids in body proteins. Two amino acid derivatives contain the majority of selenium in our bodies: selenomethionine is the storage from of selenium and selenocysteine is the active form of selenium. Organ meats (such as liver and kidney), pork and seafood are good sources of selenium. Selenium is also present in plant foods and is dependent upon the selenium content of the soil in which they are grown.
Describe how vitamin A functions in the maintenance of healthy vision.
(71) VerifiedVitamin A enables us to see differences in the brightness of light and to distinguish between different wavelengths of light and thus experience different colours. When light hits the retina, the retinal (the aldehyde form of vitamin A) stored in the retina causes a change in the rod cells, which allows us to see black and white images. The cone cells of the retina, which are only effective in bright light, use retinal to interpret different wavelengths of light as different colours.
Vitamin A deficiency causes a disorder called night blindness, where the eyes can't adjust to dim light and vision is not quickly restored after bright flashes of light. Colour blindness can also result from vitamin A deficiency. If vitamin A deficiency progresses, it can result in irreversible blindness due to a hardening of the cornea. The epithelial cells of the cornea stop producing mucus and the cornea becomes dry and susceptible to damage, infection, and hardening. Once the cornea hardens, the resulting blindness is irreversible.
Carotenosis, a skin condition associated with consuming high levels of beta-carotene, is also known as what?
(76) What are the toxicity symptoms of vitamin A and how can they be reversed?
(79) Toxicity symptoms of vitamin A include birth defects, spontaneous abortion, blurred vision, and liver damage.
(65) Antioxidants must be consumed in our diet because our bodies cannot make them.
(81) Compounds that protect our cells from the damage caused by oxidation are known as
(73) A genetic disorder that results in an excess of iron absorption and storage is
(75) Which of the following cooking methods will likely destroy the MOST vitamin C in food?
(82) Only the retina's rod cells, and not its cone cells, require retinal.
(80) Excessive consumption of vitamin A supplements can be highly toxic.
(78) Taking vitamin E supplements along with which of the following substances can cause uncontrollable bleeding?
(77) Research studies have consistently demonstrated an association between a reduced risk of cancer and
(71) As beta carotene is not considered a nutrient, no RDA has been established.
(92) Mark was fed too many carrots when he was little and his mother noticed that his skin began looking orange. What is the most likely explanation for this?
(80) 
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