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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

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

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

vitamin E sources

plants, 60% of diet comes from nut and seed oils

vitamin K functions

blood clotting


bone formation

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

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:
beverages 85% water
fruits & vegetables 75 to 90% water
meats 50 to 70% water

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:
• role in water balance along with sodium
• key role in muscle & nerve activity
• Excess & deficiency can cause irregular heart beats
• Common food sources – bananas, potatoes, tomatoes, oranges, milk & milk
products
• Increased dietary potassium reduces stroke risk, study suggests

phosphorus

Key component of bones & teeth
• Needed for acid-base balance
• Deficiency may lead to loss of calcium from bones
• Food sources: milk & milk products, meats, seeds & nuts

Fluorine

Needed for formation & maintenance of tooth enamel
• Helps prevent tooth decay
• Added to municipal water supply in U.S.
• Not removed by filters in water pitcher or faucet
• Excess intake results in discoloration of teeth & bones


zinc

growth, taste, smell, hearing, immune function, carbohydrate
metabolism
• required for >200 enzymes to function

iodine

Component of thyroid hormone that
• help regulate energy production & growth
• Inadequate intake result in goiter
• To prevent deficiency salt iodized
• Other good sources: milk & milk products, bread from commercial bakeries


calcium

~ 3 lbs calcium in our body
• 99% located in bones & teeth
• 1% is found in blood & other body fluids
• Key in bone formation & osteoporosis prevention
• Also functions in:
– muscle contraction
– nerve signaling
– blood clotting


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
• Soy milk
• Tofu
• Kale, broccoli, & bok choy
• Calcium-fortified foods
• Daily calcium intake needs: 1-1.3 grams or 1000 to 1300 milligrams (mg)

low calcium intake during growing years increases probability of

fractures and osteoporosis

osteoporosis

Incidence: 44 million adults in U.S.
• Accounts for 1.5 million fractures annually
• Rate increases with age
• Affects 1 in 4 women & 1 in 8 men
• Preventable – diet & life style key factors

osteoporosis risk factors

Female gender
• Menopause
• Deficient calcium intake
• Caucasian or Asian descent
• Thinness (“small bones”)
• Cigarette smoking
• Excessive alcohol consumption
• Ovarectomy before age 45
• Physical inactivity
• Deficient vitamin D status
• Genetic factors


iron

Key role in transport of oxygen as part of hemoglobin in red blood cells
• Two forms of iron – heme (from animal sources) & non-heme (from plant
sources)
• Heme form higher bioavailability for absorption than non-heme

iron sources

liver, red meat, dried beans, fortified cereals, raisins, & prune juice
• Cooking foods in iron & stainless steel pans can provide significant source of
iron

iron deficiency

fatigue & weakness
short attention span & irritability
poor appetite
increased susceptibility to infection


iron-deficiency anemia

paleness
exhaustion
rapid heart rates

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
weight loss
regular exercise
moderate alcohol consumption
smoking cessation

what is the DASH diet based upon

veggies, fruits, low-fat dairy, whole grains, poulty, fish