chapter 7 Flashcards
what are vitamins
organic compounds essential in small amts for body functioning
doesn’t provide energy but enables body to use energy from carbs fats and protein
what was created to replace recommended dietary allownaes (RDAs) and when
Dietary Reference Intakes (DRIs) in 1997
who are inclined to vitamin deficiences
do not eat balanced didet
alchoholics
ppor and incapacitated elerdy
clients w serious diseases that affect appetite
ID
young children receiving inadequate care
deficiency of fat-soluble vitamins ofcur in clients w chorinc malabsorption (CF, celiac, crohns)
avitaminosis
without vitamins
hypervitaminosis
excess of one or more vitamins
how can vitamin loss be avoided
buying freshet unbruised veg and fruit locally and using within day time
prep fresh veg and fruit j before serving
heating canned veg quickly and in own liquid
follow package directions when using frozen veg or fruit
using as little water as possible when cooking and having it boil before adding veg, or preferably steaming them
cover the pain, cook veg util bright in color and crisp and tender
- save cooking liquid for soups steews and gravies
- store fresh veg and fruits in cool dark place
- microwave fruits and veg in 1-2 tbsp of water
- cook corb on cob in microwave by wrapping in paper towel
- roasting veg to retain nutrients rather than boiling
how are vitamins classified
solubility
fat solubiton - vitamin a, d,e, and k (4 total)
water insoluble - vitamin b complex and c (9 total)
vitamin d is sometimes classified as hormone
b-complex as catalysts or coenzymes
when vitmain has diff chem form but same purpose its sometimes called vitamer
what is a precursor or provitamin
substance from which body can synthesize specifci vitamin
carotenoids r example of precurose of vitamin a and r referred to as provitamin a
what are sources of vitamin a (retinol)
Liver, fish oils, egg yolks, and whole-fat dairy products
whole milk, butter, cream, cod liver oil
dark-green leafy veg, deep yellow or orange fruit, fortified margarine
functiosn of vitamin a
necessary for the formation of healthy epithelial tissue
mainteance of vision in dim light, maintance mucous membranes and healthy skin
, growth anddevelopment of bones,
reporducution,
healthy immune syste, antioxidants
keep eyes moist and free of infection, hel lining of lungs and intestines remain moist and disease free
deficiency of vitamin a
night blindness
xerophthalmia
respirairy infections
bone growth ceases
dry and scaly skin, fatigue
toxicity of vitamin a
birth defects
bone pain
anorexiant
enlargement of liver
severe headaches, bone pain, dry skin, hair loss, vomiting, and liver damage
sources of vitamin d (calciferol)
salmon and tuna, foritifed milk and yogurt, foritifed margarine, fortified orange juice, sunlight
lake trout, eggs, butter
functions of vitamin d (calciferol)
regulation of absortions of caclium and phosphorus
buildign and maintenance of normal bones and teeth
prevent of tetany
immune and muscular function
reduction of inflammation
regulates cell cycle and cell differentiation
deficiency of vitamin d (calciferol)
rickets
ostteomalacia
osteoporosis
poorly de eloped teeth and bone
muscle spasms
rickets (n chidlren)
toxicity of vitamin d (calciferol)
kidney stones
cacificiation of soft tissues
sources of vitamin e (tocopherol)
leaft green veg
margarine
salad dressing
wheat germ
veg oil
nuts
functions of vitamin e (tocopherol)
antioxidant
considered essential for protiection of cell strucutre, esp of rbc
deficiency of vitamin e (tocopherol)
destruction of rbc
toxicity of vitamin e (tocopherol)
bleeding
sources of vitamin k
liver, milk
leafy, green veg, cabbage, boccoli, brussel sportous
green leafy vegetables, cabbage, and broccoli. Prunes, blueberries, blackberries, eggs, grain products, and nuts also supply small amounts of this vitamin.
functions of of vitamin k
blood clotting
deficiency of vitamin k
prolonged blood clotting or hemorrhaging
toxicity of vitamin k
hemolytic anemia
interferes w anticlotting med
jaundice + brain damage
sources of thiamine (B1)
lean pork, beef, liver, eggs, fish, whole and enriched grains, legumes, brewers yeast
functions of thiamine (B1)
metabolism of carb and some amino acids
maintain normal appetite and functioning of nervous system
deficiency of thiamine (B1)
gi, nerv, and cv system problems
beriberi
weakness
loss of appetite
irritability
Poor arm and leg coordination
nervous tingling throughout the body
edema and heart failure
toxicity of thiamine (B1)
none
sources of riboflavin (B2)
liver, kidney, heart, milk, cheese
leafy green veg, cereals, enriched bread
Milk and milk products, Enriched and whole-grain cereals, meats, poultry, and fish
functions of riboflavin (B2)
aids release of energy from food
health of mouth tissue
healthy eys
deficiency of riboflavin (B2)
cheilosis
eye sensitivity
dermatitis
glossitis
photophobia
inflamed tongue and cracked skin around the corners of the mouth. Various eye disorders and mental confusion
toxicity of of riboflavin (B2)
none
sources of niacin (nicotinic acid)
milk, eggs, fish, poultry
enriched breads and cereals
functions of niacin (nicotinic acid)
energy metabolism
healthy skin and nervous and digestive sstems
normal digestion
deficiency of niacin (nicotinic acid)
pellagra (dermatitis, dementia, diarrhea)
early symptoms include poor appetite ,wt loss, weakness
toxicity of niacin (nicotinic acid)
vasodilation of blood vessels - can cause niacin flush
nausea, dizziness, low bp
sources of pyridoxine (B6)
pork, fish, poultry, liver/ kidney, milk, eggs
whole-rain cereals, legumesfun
functions of pyridoxine (B6)
conversion of tryptophan to niacin
release of glucose from glycogen
protein metanlism and sythesis of nonessential amino acids
thought to play a role in more than 100 enzyme reactions
6 helps make the protein that allows red blood cells to carry oxygen
deficiency of of pyridoxine (B6)
cheilosis
glossitis
dermatitis
confusion
depression
irritanility
skin disorders, fatigue, irritability, and convulsions.
toxicity of pyridoxine (B6)
depression
nerve dammage
sources of cobalamin (B12)
seafood, poultry, liver/ kidney, muscle meats, eggs, milk, cheese
functions of cobalamin (B12)
synthesis of rbc
maintenance of myelin sheaths
treatment of pernicious anemia
folate metabolism
needed for growth, maintenance of
healthy nerve tissue, and formation of normal red blood cells. It also is needed for the release of energy from fat
defiency of cobalamin (B12)
degeneration of myelin sheaths
pernicious anemia
- a red, painful tongue and a tingling
or burning in the skin. Nerve damage can eventually lead to walking difficulties and paralysis. Nerve damage can also cause memory loss and mental slowness.
sore mouth and tongue
anorexia
neurological disoders
toxicity of of cobalamin (B12)
none
sources of folate
liver
leafygreen veg, spunach, legumes, seeds, broccoli, cereal and flour foritifed w folate, fruit
functiosn of folate
synthesis of rbcs and dna
defificency of folate
anemia glossitis enural tube defects like anechepalhy and spiuna bifida
miscarriage, speperation from uterus wall
RBC are fragile and cant mature or hold oxygen
toxicity of folate
could mask b12 defieicny
sources of biotin
milk, liver and kidney, egg yolks,
;egumes ,brewers yeast, soy flour, cereals, fruit
broccoli, spinach, cauliflower
Egg yolks, yeast, beans, nuts, cheese, and liver
functions of biotin
coenzymes in carb and amino acid metanolism
niacin synthesis from tryptophan
helps the body make fat and glycogen
deficiency of biotin
dermatitis, nausea, anorexia, depression, hair loss
increase in serum cholesterol
similar symptoms of the circulatory and muscular systems as a thiamin defi-ciency. These symptoms include abnormal heart rhythms, pain, weakness, fatigue, and depression. Nausea, loss of appetite, hair loss, and dry, scaly skin are other symptoms.
toxicity ofbiotin
none/ unknown
sources of pantothenic acid
eggs, liver, salmon, poultry
mushrooms, cauliflower, peanuts, brewers yeasty
whole grain cereals and legumes
thought to be synthesized by body
functions of pantothenic acid
metablism of carb, lipid, and proteins
synthesis of fatty acids, cholesterol, steroid hormones (like acetycholine)
deficiency of of pantothenic acid
rare: burning feet syndrome, vomiting, fatugie
toxicity of of pantothenic acid
none
sources of vitamin c (ascorbic acid)
all citrus fruits
broccoli
melons
strawberries
tomatoes
brussel sprouts
potatoes
cabbage
green peppers
functions of vitamin c (ascorbic acid)
prevention of scurvry
formation of collagen
healing of wounds
release of stress hormones
absoprtion of iron
antixoidant
resistance to infection
deficiency of vitamin c (ascorbic acid)
scury
muscle cramps
ulcerated gums
tendency to bruce easliy
toxicity of vitamin c (ascorbic acid)
raise uric acid level
hemolytic anemia
kidney stones
rebound scurvy
f nausea, diarrhea, and stomach cramps. Large doses may also reduce the ability of vitamin B12 to function
mineral oil can/ cant be absorbed humans
cant
whree is excess fat soluble vitamisn stored
liver; because of this deficiency of fat-soluble vitamin deficiences eappear slower although mega doses shoudl be avoided cause it can get toxic fast
what are the two forms of vitamin A
preformed vitmain A (retinol, adctive form)
carotenes (inactive form, found in plants, alpha-and beta-carotene - lower REA value)
what are antioxidants
protect cells from free radicals (atoms or groups of atoms w unpaired electrons that can be formed when oxygen itneracts w certain molecules thus causing a chain reaction by reacting with important cellular components)
what are common carotenoids
beta-carotene, lutein, lycopene, eaxanthin
what is most efficiently ocnverted to retnol
beta-carotene
best sources of beta-carotene
carrots, swet potatoes, spinach , broccoloi, pumpims, squash, mango cantaleoupe
what are vitamin a values commonly isted as + measurement
retinol equivalent (RE)
1mcg retinol or 6 mcg beta-carotene
what is the leading cause of blindness
lack of vitamin a
two forms of vitmain D
D2 ergocalciferol and D3 cholecalciferol
how is vitamin D3 formed
in humans from cholesterol in skin
vitamin d is a ____ and is ____
prohormone and heat-stable
best source of vitamin A
sunlight
chnges a provotamin to vitamin D3 in humans
what is vitamin D requirement
600 inenrational unis (15 mcg)
percent of population withvitamin d deficiency
40-75%
vitamin d influences expression of ___ gnees in our body
229
what are the two groups of vitaminE
tocopherols and tocotrienols