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167 Cards in this Set
- Front
- Back
risks for underweight
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not enough reserves
can't fight wasting disease |
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hunger
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prompts eating,
physiological desire |
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satiation
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signals to stop eating
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satiety
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lack of hunger
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appetite
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psychological desire
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x - y = energy balance
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energy intake - expenditure
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energy expenditure:
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basal metabolic rate
thermic effect of food genetics environment behavior |
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major components of energy expenditure
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BMR
Physical activity thermic effect of food (TEF) |
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BMR - Basal Metabolic Rate
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energy for basic body functions
affected by body size, composition, age, and gender |
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physical activity
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highly variable
affected by body size, fitness level, type of activity |
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thermic effect of food- TEF
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energy to digest, absorb, metabolize food
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BMR for females
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.9*24hr*weight(kg)
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BMR for males
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1*24*wight(kg)
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total energy needs: x*y*z
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BMR*thermic effect (1.1)*activity level
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determining body composition
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assessing body weight (tables, BMI)
assessing body fat body fat distribution |
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ways to estimate body fat
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antropometry
underwater weighing bio-electrical impedance DEXA |
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antropometry
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skinfold test
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underwater weighing
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weight in water vs weight in air
most accurate |
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bio electrical impedance
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(electrical current)
fat has different electrical resistance than water |
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DEXA
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(xrays)
fat responds differently to xrays than water |
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25-30 BMI
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overweight
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BMI>30
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obesity
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BMI <18.5
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underweight
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fat cell theory
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obesity increases number and size of fat cells
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set point theory
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the point at which controls are set, the body tends to maintain means of internal control
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influences on weight gain and obesity
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vHeredity and genetic factors
Sociocultural influences Age and lifestyle factors Gender and ethnicity Socioeconomic factors Psychological factors |
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how to know if you need to lose weight
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Height-weight tables <- don't use
Family history Individuality Current health parameters BMI |
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good diet and eating habits
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Reduce total calories
Reduce fat calories Increase complex carbs Improve eating habits |
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trace mineral content of food depends on
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soil, water, processing
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when are TMs toxic?
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when not far above estimated requirements
|
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T/F FDA can limit supplements
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false
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component of thyroid hormone
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iodine
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iodine deficiencies
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Goiter- enlargement of thyroid gland
Cretinism- during pregnancy, mental and physical retardation in baby |
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iodine deficiencies source
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ocean and coastal areas
ocean mist contains it seafood and water iodized salt |
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part of hemoglobin and myoglobin,
carries and release oxygen (O2) |
iron
|
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two forms of iron
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heme vs nonheme
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heme iron
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found in animal foods and is better absorbed than nonheme
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non heme iron
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found in plant and animal food and is absorbed poorly
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factors that affect iron absorption
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increased by vitamin C, MFP factor, increased need (preg/children)
decreased by tannic acid (tea/coffee), calcium and phosphorous |
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iron deficiencies
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iron def- depleted iron stores
anemia- severe depletion of iron stores with low hemoglobin concentration def mistaken for laziness in school |
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most common deficiency in US and world
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iron
|
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biggest symptom of iron def
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chronic fatigue
recurring illness |
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hemochromatosis
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iron overload
|
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leading thread of iron poisoning
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children accidentally taking iron pills
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iron in heme foods
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(best absorbed)
red meat oysters turkey chicken |
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nonheme
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spinach
lentils tofu |
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zinc def can result in
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growth retardation
delayed sexual maturation impaired immune function, brain function |
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sources of zinc
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shellfish
meats, poultry liver whole grains |
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works as antioxident and makes thyroid hormone active
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selenium
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selenium def
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may increase risk for heart disease
|
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forms crystal structure of teeth
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flouride
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most widespread health problem
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dental cavaties (def risk)
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flouride toxicity
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in places where water FL is too high see fluorisis
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best source of flouride
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water
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associated with insulin to facilitate glucose uptake into cells
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chromium
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supplements of this do not help lose fat and build muscle
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chromium
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sources of chromium
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eggs, meats, whole grains, veg oils, nuts
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helps form hemoglobin
collagen synthesis works with many antiox enzymes |
copper
|
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sources of copper
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legumes
whole grains nuts organ meats seeds dried fruits |
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many require protein carrier for transport
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fat soluble vitamins
|
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vits less readily excreted
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fat soluble vits
|
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needed in periodic doses
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fat soluble vits
|
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likely to reach toxic levels when consumed from supplements
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fat soluble vits
|
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other names- retinol, retinal, retinoic acid
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vitamin A
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Pro-vitamin A..
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(precursor) is beta caroten (an orange pigment found in plants)
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beta carotine is an
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antioxidant
|
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T/F vitamin A is a antiox
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False
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vitamin A only found in
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animal products
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functions for vitamin A
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vision*
cell growth support immune/reprod system |
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vit A defs
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night blindness
|
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vit A toxicity
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birth defect: terarogenesis
liver failure seen in supplements |
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rich sources of vit A
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animal foods
rich sources of precursor to vit A (eg beta carotene) liver |
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other name- Cholecalciferol
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vitamin D
|
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synthesized in body by sunlight
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vitamin D
|
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vit that is a hormone
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vitamin D, produced in one part of body and acts in another
|
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roles of vit D
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increase absorption of calcium and phosphorous
maintain optimal blood calcium and calcification of bone |
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vitamin D def
|
rickets in children
osteomalacia in adults (softening of bones) |
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vit D toxicity
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liver has small storage capacity
supplements kidney damage |
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rich sources of vitamin D
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exposure to sunlight
only animal based foods have sig amounts (unless fortified) |
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dark skinned need up to __ of sun for several days to make enough vit d
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3hrs
|
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light skinned need up to __ of sun for several days to make enough vit d
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10-15 mins
|
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other name- tocopherol
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vitamin E
|
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vit that is antiox, stored in adipose tissue and cell membranes, protects vit A from oxidation
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vitamin E
|
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sources of Vit E
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raw veg oils but high temps destroy,
nuts and seeds fortified cereals |
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vit E def/toxicity
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not common
|
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blood clotting
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vit K
|
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synthesis of bone proteins
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vit K
|
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T/F bacteria in GI tract can synthesize vit K
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true but not enough
|
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sources of vit K
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GI baceria
leafy greans cabbage like vegs |
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vit k toxicity
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can occur with supplements
jaundice (yellowing of skin) anemia |
|
1 in __ households use bottled water
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15
|
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T/F FDA regulates bottled water sold in interstate commerce
|
true
|
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T/F FDA tests bottled water
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true, less rigorous than tap
|
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most indispensable nutrient
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water
|
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makes up 60% of adult's weight
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water
|
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water...
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essential nutrient, solvent, cushions joints, eyes, fetus, temp reg, lubricant, blood volume, transports
|
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ADH (antidiuretic hormone)
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alcohol inhibits it = dehydration (hangover)
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when blood pressure is too low or blood is too concentrated..
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1) Hypothalamus --> pituitarty --> ADH release
2) Kidneys release renin: |
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water follows..
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SALT
|
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electrolytes
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salts that dissolve in water and dissociate
|
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electrolyte examples
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sodium
chloride potassium |
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electrolytes attract..
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WATER
|
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electrolytes that reside in cell
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K+
|
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electrolytes that reside outside cell
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Na+, Cl-
|
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electrolytes create
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osmotic pressure
|
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electrolytes are pumped across cell membranes by
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transport proteins
|
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result of electrolytes governing water flow
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fluid and electrolyte balance
|
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most abundant mineral in body
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calcium
|
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calcium is mostly ing
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99% bones and teeth
rest is dissolved in blood |
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usually absorb __ ingested calcium
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30%
|
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calcium functions
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Structure of bones, teeth*
Muscle contraction* Nerve transmission* |
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low intakes of calcium have risk for
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colon and rectal cancer
|
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when blood Ca is too low:
intestines--> |
absorb more calcium
|
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when blood Ca is too low:
bones---> |
release more calcium
|
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when blood Ca is too low:
kidneys---> |
extrete more calcium
|
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blood calcium is maintained at the expense of..
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bones
(you cant tell calcium status from blood sample) |
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calcium def is a silent disease until..
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elderly
|
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rich sources of calcium
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milk and milk products (best)
soy milk broccoli OJ |
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calcium def
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bone mass peaks ~35 yrs
rickets osteoporosis - fragile bones |
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how to decrease bone loss
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exercise
adequate calcium adequate vit D estrogen replacement after menopause |
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second most abundant mineral in the body
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phosphorus
|
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phosphorus..
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bone and teeth structure
major buffer part of DNA and RNA role in metabolism phospholipids high phosphorus decreases Ca absorption |
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sources of phosphorus
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soft drinks
animal protein legumes dairy fish |
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magnesium..
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component of bones
important to enzymes ATP metabolism inhibits muscle contraction inhibits blood clotting prevents dental caries protects against hypertension |
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sources of magnesium
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dark green foods
legumes whole grains nuts chocolate |
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principle cation outside of cell
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sodium
|
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sodium
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maintains fluid and electrolytes balance, nerve transmission, muscle contraction
|
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sources of sodium
|
processed foods,
salt |
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crucial in maintaining fluid and electrolyte balance
|
potassium
|
|
principle cation within body cells
|
potassium
|
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K def and toxicity
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rare
dehydration, diabetes, drugs |
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sources of K
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fruit and vegs, meats milk whole grain
|
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as processing increases, K __ and sodium __
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decreases and and sodium increases
|
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major anion outside cell
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chloride
|
|
needed for fluid and electrolyte balance
|
chloride
|
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chloride..
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HCI in stomach
loss when vomiting |
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T/F sulfur is not used as a nutrient by itself
|
True but is part of other compounds
|
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sulfur..
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bridges in proteins, stabilizes shape
|
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part of vitamins, biotin, and thiamin, and insulin
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sulfur
|
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affects skin, hair, and nails
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sulfur
|
|
sulfur sources
|
most foods but fruit
|
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metabolism
|
extraction of energy from food
|
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energy source
|
chemical energy in carbs, fats, protein
|
|
food energy to cellular energy stages
|
Stage 1: digestion of food
Stage 2: absorption and transport of molecules to tissues and organs Stage 3: breakdown of molecules and production of energy within cells |
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catabolism
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reactions that breakdown compounds into small units
|
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anabolism
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reactions that build complex molecules from smaller ones
|
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__ is the metabolic processing center
|
cell
|
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__ is the body's energy currency
|
ATP (form of energy cells use)
|
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transport shuttles
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NAD and FAD
|
|
coupled reactions
|
energy released from the breakdown of one compound is used to create another compound
|
|
T/F energy can be captured by some molecules and transferred to other molecules
|
True
|
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T/F fat soluble vits are found in fatty foods
|
true
|
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T/F most people can meet vit needs through food
|
true
|
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T/F steaming is the best cooking method to retains vitamins in vegs
|
false
|
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T/F carrots, winter squash, brocolli are good sources of vit A
|
false
|
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T/F vit E keeps bones strong
|
false
|
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T/F Consuming too much phosphorus interferes with calcium absorption
|
true
|
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T/F Storing fat around the hips is as unhealthy as storing it around the waist
|
false
|
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T/F Skinfold calipers are the most accurate way to measure body composition
|
false
|
|
Vitamin K is necessary for the synthesis of:
|
Prothrombin
|
|
T/F water Helps transport waste products for excretion
|
true
|
|
The hormone that signals the kidneys to reabsorb sodium is called
|
Aldosterone
|
|
The major anion found in the extracellular fluid is:
|
Chloride
|
|
Phosphorus is necessary
|
To provide energy as part of ATP
|
|
Chromium increases the effectiveness of which hormone:
|
Insulin
|
|
Kyle has a BMI of 27. He is considered
|
Overweight
|
|
BMR refers to:
|
The amount of energy expended to meet basic physiological needs that enable the organs and cells to function
|