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124 Cards in this Set
- Front
- Back
do vitamins provide energy or make up body tissues |
no |
|
vitamin |
chemical substance with specific metabolic fn |
|
vitamins activate ____ in the conversion of macronutrients to energy |
enzymes |
|
why are vitamins considered essential |
because they are vital to health and cannot be produced by body in sufficient amounts |
|
water soluble |
co-enzymes travel freely in circulation and cells easy to absorb lower toxicity than fat-soluble small amount stored in body increased need during pregnancy deficiency state more likely: symptoms develop after weeks or months |
|
fat soluble |
insoluble in water, bile required for digestion absorbed into lymph require chylomicrons for transport sorted in fatty tissues and liver potential for toxicity exists serve structural and regulatory processes deficiency takes longer to develop when intake is low |
|
vitamin A functions |
eyesight night vision integrity of epithelial tissue immune system health bone health |
|
vitamin A toxicity |
hyper A vitaminosis |
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vitamin A sources |
animal foods beta-carotene is precursor |
|
bioavailability |
proportion of a vitamin that can be absorbed, transported, and utilized by the body once it has been consumed |
|
vitamin A deficiency is the number one cause of |
blindness |
|
vitamin D functions |
bone growth maintain blood calcium |
|
vitamin D deficiency |
rickets, osteomalacia |
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vitamin D toxicity |
5 X RDA hypercalcemia diarrhea, headache, nausea |
|
vitamin D sources |
fortified milk precursor sterols by sunlight |
|
vitamin E functions |
antioxidant protects lung membranes reduce risk of heart disease heal burns |
|
vitamin E toxicity |
rare |
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vitamin E sources |
plants, 60% of diet comes from nut and seed oils |
|
vitamin K functions |
blood clotting bone formation |
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vitamin K deficiency |
possibly uncontrolled bleeding |
|
vitamin K toxicity |
rare |
|
vitamin K sources |
spinach and liver bacteria in intestines |
|
which vitamins are water soluble |
B vitamins and C |
|
which vitamins are fat soluble |
A, D, E, K |
|
vitamin B1 (thiamin) function |
energy metabolism |
|
vitamin B1 (thiamin) deficiency |
beriberi: weakness, pain, low morale |
|
vitamin B1 (thiamin) toxicity |
none |
|
vitamin B1 (thiamin) sources |
meats, whole grains, beans, nuts |
|
vitamin B2 (riboflavin) functions |
energy metabolism |
|
vitamin B2 (riboflavin) deficiency |
ariboflavinosus: confusion, skin rash, nervous disorders |
|
vitamin B2 (riboflavin) toxicity |
none |
|
vitamin B2 (riboflavin) sources |
milk easily destroyed by UV light |
|
vitamin B3 (niacin) functions |
energy metabolism may lower LDL cholesterol and raise HDL |
|
vitamin B3 (niacin) deficiency |
pellegra: diarrhea, irritability, confusion, skin rash |
|
vitamin B3 (niacin) toxicity |
10x RDA: possible liver damage |
|
vitamin B3 (niacin) sources |
high protein foods |
|
folate functions |
new cell synthesis co-enzyme |
|
folate deficiency |
megaloblastic anemia |
|
folate toxicity |
none |
|
folate sources |
fortified grains |
|
most common birth defect |
neural tube |
|
neural tube defect are |
abnormalities of the spinal cord and brain |
|
what prevents 2/3 of neural tube cases |
folic acid |
|
vitamin B12 (cobalamin) functions |
new cell synthesis |
|
vitamin B12 (cobalamin) deficiency |
anemia, fatigue, paralysis |
|
vitamin B12 (cobalamin) toxicity |
none |
|
vitamin B12 (cobalamin) sources |
animal foods |
|
vitamin B6 (pyridoxine) functions |
amino acid synthesis and metabolsim |
|
vitamin B12 (cobalamin) deficiency |
seen w/chronic alcohol abuse nerve damage |
|
vitamin B12 (cobalamin) toxicity |
nerve damage, depression, fatigue |
|
biotin functions |
energy, amino acid and fat metabolism |
|
biotin deficiency |
consumption of large quantities of egg whites: abnormal heart rate, nausea, fatigue, confusion, nervous disorders |
|
biotin toxicity |
none |
|
biotin sources |
grain, meats, beans, veggies |
|
panthothenic acid functions |
energy metabolism |
|
panthothenic acid toxicity |
none |
|
panthothenic acid sources |
most foods |
|
choline functions |
transport and metabolism of lipids |
|
choline deficiency |
fatty liver, infertility |
|
choline toxicity |
low blood pressure, liver damage, sweating |
|
choline sources |
can be synthesized within the body but not by the body high protein foods |
|
vitamin C functions |
collagen synthesis antioxidant enhances iron absorption |
|
vitamin C deficiency |
scurvy |
|
vitamin C toxicity |
headache, GI symptoms, rash |
|
vitamin C sources |
citrus fruits and veggies |
|
the antioxidant vitamins |
beta-carotene, E, and C |
|
purpose of antioxidants |
stabalize or repair oxidized molecules |
|
function of water |
temperature control, transport, removal of waste, hydration |
|
is water the medium for chemical reactions |
yes |
|
what is the body's main source of fluoride |
water |
|
water weight by percentage in adults |
60-70% |
|
proportion of water in tissues varies |
blood- 83 muscle- 75 bone- 22 fat cells- 10 |
|
how do we lose water |
sweat urine stool exhaled air |
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increased water needs occur with |
illness high protein diets high fiber diets alcohol consumption hot, humid conditions strenuous activity |
|
intake of water |
foods contributing to daily water intake: |
|
how much water do physically inactive ppl need |
2 cups of water |
|
how many cups of water do men and women need daily |
12, 9 |
|
10 cups of water each day can decrease risk of |
bladder, breast, and colon cancer kidney stone formation |
|
symptoms of dehydration |
nausea and dizziness fast heart rate increased body temp fatigue dry mouth unable to produce tears dry skin lightheadedness and headache low urine output; dark color |
|
kidney failure can be a result of |
dehydration |
|
hyponatremia |
low sodium levels in blood |
|
water intoxication is seen in whom |
rare seen in infants, marathon runners |
|
does water quench thirst better than soda |
yes |
|
FDA estimates ___ of bottled water is ____ |
40%, tap water |
|
hard water |
high amounts of minerals, carbonates, and sulfates |
|
soft water |
naturally low in minerals, or soft by filtration |
|
how many minerals are considered essential |
15 |
|
what allows minerals to combine and form |
charge |
|
charged minerals are involved in |
muscle contractions and nerve impulse propagation |
|
charged minerals are also |
cofactors |
|
charged minerals and other functions |
help maintain adequate balance in body assist in acid-base balance act as cofactors |
|
what is a potential problem with charged minerals |
may combine with other substances in food & form highly stable compounds that are not easily absorbed |
|
potassium |
Key functions: |
|
phosphorus |
Key component of bones & teeth |
|
Fluorine |
Needed for formation & maintenance of tooth enamel
|
|
zinc |
growth, taste, smell, hearing, immune function, carbohydrate |
|
iodine |
Component of thyroid hormone that
|
|
calcium |
~ 3 lbs calcium in our body
|
|
how often are bones replaced |
every decade |
|
bones go through repair and replacement process known as |
remodeling |
|
insufficient calcium for remineralization results in |
osteoporosis |
|
bones develop and mineralize for how long |
first 3 decades of life |
|
before 30, bone mass is increased by |
adequate calcium and vitamin d intake |
|
after 50, adequate calcium and vitamin d help |
preserve bone density |
|
what increases absorption and deposition of calcium |
vitamin d |
|
calcium sources |
Dairy products |
|
low calcium intake during growing years increases probability of |
fractures and osteoporosis |
|
osteoporosis |
Incidence: 44 million adults in U.S. |
|
osteoporosis risk factors |
Female gender
|
|
iron |
Key role in transport of oxygen as part of hemoglobin in red blood cells |
|
iron sources |
liver, red meat, dried beans, fortified cereals, raisins, & prune juice |
|
iron deficiency |
fatigue & weakness
|
|
iron-deficiency anemia |
paleness |
|
can excess iron be easily be excreted |
no |
|
hemochromatosis |
an inherited disorder resulting in over absorption of iron |
|
blood pressure |
systolic (heart contracting) over diastolic (heart filling with blood) |
|
what is a normal blood pressure |
120/80 |
|
risk factors of hypertension |
age and family history High sodium diet, obesity, physical inactivity, excess alcohol consumption, low fruit & vegetable consumption |
|
HTN and salt sensitivity |
reduction in salt intake, weight loss, and physical activity improve blood pressure |
|
what is the major risk factor of HTN |
obesity |
|
what is the most effective treatment of HTN |
weight loss |
|
how much weight loss is associated with significant decrease in blood pressure |
10% |
|
treatment of HTN |
moderate sodium diet or DASH diet |
|
what is the DASH diet based upon |
veggies, fruits, low-fat dairy, whole grains, poulty, fish |