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