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26 Cards in this Set
- Front
- Back
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Serotonin, an important chemical relating to brain function, is produced by the body from typtophan. Using your knowledge of vitamins, what nutrient would be most important for this conversion?
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Vit B6-pyridoxine (amino acid metabolism)
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Does iron facilitate transfer of electrons in the respiratory chain?
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yes
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Taking iron supplements, when not needed, may supply too much non-heme iron which could increase risk for deficiency of Vitamin A through the adverse interaction with what nutrient?
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zinc
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The main univalent cation of intracellular fluid is?
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potassium (K+)
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Pantothenic acid is:
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1. a "B complex" vitamin
2. involved in E metabolism (with CoA) 3. water soluble |
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Could a high dietary iron to zinc ration lead to reduced visual activity?
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Yes, this decreases zinc absorption which decreases RBP and vitamin A which decreases vision
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What is the UL for iron?
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45 mg/day
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What nutrient has been reported to help improve glucose metabolism/utilization in the body?
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chromium
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The ionic form of iron that is absorbed the most efficiently is?
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Fe+2
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What vitamin is believed to function like a steroid hormone?
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calcitrol (active vitamin D)
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What vitamin directs cellular differentiation of epithelial cells?
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vitamin A
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What plays a contributing role in hydroxyapatite crystal formation?
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fluoride
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Lipoic acid:
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1. decarboxlations
2. fatty acid (sulfur) derivative 3. fuctions in antioxidant pathways |
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What does low stomach acid do to vitamin K?
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may increase production of it
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At high intake levels do retinyl acetate supplements pose little risk for toxicity?
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no...very toxic, so use pro-vitamin A carotenoids instead.
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Can certain forms of kidney disease increase the risk for bone disease?
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yes, diseased kidney may not activate vitamin D
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What two nutrients are part of hydroxyapatite?
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calcium and phosphorus
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An increased risk for Vit K deficiency can be seen in?
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1. newborns
2. long-term oral antibiotic use |
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What nutrient is important for kinase reactions (which promote phosphorylation in E pathways) and therefore involved in E metabolism?
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magnesium
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Vitamin B6 is indirectly involved in E metabolism due to its role in forming what nutrient?
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Niacin (tryptophan turns into niacin)
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Potassium intake/day recommendation
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4700mg
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Excessive intake of various forms of what may enhance the risk for internal hemorrhage?
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vitamin E
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The activation of which enzyme below can be used to determine the nutritional status for riboflavin?
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glutathione reductase
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Which fat soluble vitamin has as a principle function the maintenance of membrane integrity?
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tocopherols (vit E)
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low sodium food is
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less than or equal to 140 mg/serving
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what substances enhance the uptake of non-heme iron into the gut cell?
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ascorbic acid (vit C), lactic acid, fish
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