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167 Cards in this Set

  • Front
  • Back
risks for underweight
not enough reserves
can't fight wasting disease
hunger
prompts eating,
physiological desire
satiation
signals to stop eating
satiety
lack of hunger
appetite
psychological desire
x - y = energy balance
energy intake - expenditure
energy expenditure:
basal metabolic rate
thermic effect of food
genetics
environment
behavior
major components of energy expenditure
BMR
Physical activity
thermic effect of food (TEF)
BMR - Basal Metabolic Rate
energy for basic body functions
affected by body size, composition, age, and gender
physical activity
highly variable
affected by body size, fitness level, type of activity
thermic effect of food- TEF
energy to digest, absorb, metabolize food
BMR for females
.9*24hr*weight(kg)
BMR for males
1*24*wight(kg)
total energy needs: x*y*z
BMR*thermic effect (1.1)*activity level
determining body composition
assessing body weight (tables, BMI)
assessing body fat
body fat distribution
ways to estimate body fat
antropometry
underwater weighing
bio-electrical impedance
DEXA
antropometry
skinfold test
underwater weighing
weight in water vs weight in air
most accurate
bio electrical impedance
(electrical current)
fat has different electrical resistance than water
DEXA
(xrays)
fat responds differently to xrays than water
25-30 BMI
overweight
BMI>30
obesity
BMI <18.5
underweight
fat cell theory
obesity increases number and size of fat cells
set point theory
the point at which controls are set, the body tends to maintain means of internal control
influences on weight gain and obesity
vHeredity and genetic factors
Sociocultural influences
Age and lifestyle factors
Gender and ethnicity
Socioeconomic factors
Psychological factors
how to know if you need to lose weight
Height-weight tables <- don't use
Family history
Individuality
Current health parameters
BMI
good diet and eating habits
Reduce total calories
Reduce fat calories
Increase complex carbs
Improve eating habits
trace mineral content of food depends on
soil, water, processing
when are TMs toxic?
when not far above estimated requirements
T/F FDA can limit supplements
false
component of thyroid hormone
iodine
iodine deficiencies
Goiter- enlargement of thyroid gland
Cretinism- during pregnancy, mental and physical retardation in baby
iodine deficiencies source
ocean and coastal areas
ocean mist contains it
seafood and water
iodized salt
part of hemoglobin and myoglobin,
carries and release oxygen (O2)
iron
two forms of iron
heme vs nonheme
heme iron
found in animal foods and is better absorbed than nonheme
non heme iron
found in plant and animal food and is absorbed poorly
factors that affect iron absorption
increased by vitamin C, MFP factor, increased need (preg/children)
decreased by tannic acid (tea/coffee), calcium and phosphorous
iron deficiencies
iron def- depleted iron stores
anemia- severe depletion of iron stores with low hemoglobin concentration

def mistaken for laziness in school
most common deficiency in US and world
iron
biggest symptom of iron def
chronic fatigue
recurring illness
hemochromatosis
iron overload
leading thread of iron poisoning
children accidentally taking iron pills
iron in heme foods
(best absorbed)
red meat
oysters
turkey
chicken
nonheme
spinach
lentils
tofu
zinc def can result in
growth retardation
delayed sexual maturation
impaired immune function, brain function
sources of zinc
shellfish
meats, poultry liver
whole grains
works as antioxident and makes thyroid hormone active
selenium
selenium def
may increase risk for heart disease
forms crystal structure of teeth
flouride
most widespread health problem
dental cavaties (def risk)
flouride toxicity
in places where water FL is too high see fluorisis
best source of flouride
water
associated with insulin to facilitate glucose uptake into cells
chromium
supplements of this do not help lose fat and build muscle
chromium
sources of chromium
eggs, meats, whole grains, veg oils, nuts
helps form hemoglobin
collagen synthesis
works with many antiox enzymes
copper
sources of copper
legumes
whole grains
nuts
organ meats
seeds
dried fruits
many require protein carrier for transport
fat soluble vitamins
vits less readily excreted
fat soluble vits
needed in periodic doses
fat soluble vits
likely to reach toxic levels when consumed from supplements
fat soluble vits
other names- retinol, retinal, retinoic acid
vitamin A
Pro-vitamin A..
(precursor) is beta caroten (an orange pigment found in plants)
beta carotine is an
antioxidant
T/F vitamin A is a antiox
False
vitamin A only found in
animal products
functions for vitamin A
vision*
cell growth
support immune/reprod system
vit A defs
night blindness
vit A toxicity
birth defect: terarogenesis
liver failure
seen in supplements
rich sources of vit A
animal foods
rich sources of precursor to vit A (eg beta carotene)
liver
other name- Cholecalciferol
vitamin D
synthesized in body by sunlight
vitamin D
vit that is a hormone
vitamin D, produced in one part of body and acts in another
roles of vit D
increase absorption of calcium and phosphorous
maintain optimal blood calcium and calcification of bone
vitamin D def
rickets in children
osteomalacia in adults (softening of bones)
vit D toxicity
liver has small storage capacity
supplements
kidney damage
rich sources of vitamin D
exposure to sunlight
only animal based foods have sig amounts (unless fortified)
dark skinned need up to __ of sun for several days to make enough vit d
3hrs
light skinned need up to __ of sun for several days to make enough vit d
10-15 mins
other name- tocopherol
vitamin E
vit that is antiox, stored in adipose tissue and cell membranes, protects vit A from oxidation
vitamin E
sources of Vit E
raw veg oils but high temps destroy,
nuts and seeds
fortified cereals
vit E def/toxicity
not common
blood clotting
vit K
synthesis of bone proteins
vit K
T/F bacteria in GI tract can synthesize vit K
true but not enough
sources of vit K
GI baceria
leafy greans
cabbage like vegs
vit k toxicity
can occur with supplements
jaundice (yellowing of skin)
anemia
1 in __ households use bottled water
15
T/F FDA regulates bottled water sold in interstate commerce
true
T/F FDA tests bottled water
true, less rigorous than tap
most indispensable nutrient
water
makes up 60% of adult's weight
water
water...
essential nutrient, solvent, cushions joints, eyes, fetus, temp reg, lubricant, blood volume, transports
ADH (antidiuretic hormone)
alcohol inhibits it = dehydration (hangover)
when blood pressure is too low or blood is too concentrated..
1) Hypothalamus --> pituitarty --> ADH release
2) Kidneys release renin:
water follows..
SALT
electrolytes
salts that dissolve in water and dissociate
electrolyte examples
sodium
chloride
potassium
electrolytes attract..
WATER
electrolytes that reside in cell
K+
electrolytes that reside outside cell
Na+, Cl-
electrolytes create
osmotic pressure
electrolytes are pumped across cell membranes by
transport proteins
result of electrolytes governing water flow
fluid and electrolyte balance
most abundant mineral in body
calcium
calcium is mostly ing
99% bones and teeth
rest is dissolved in blood
usually absorb __ ingested calcium
30%
calcium functions
Structure of bones, teeth*
Muscle contraction*
Nerve transmission*
low intakes of calcium have risk for
colon and rectal cancer
when blood Ca is too low:
intestines-->
absorb more calcium
when blood Ca is too low:
bones--->
release more calcium
when blood Ca is too low:
kidneys--->
extrete more calcium
blood calcium is maintained at the expense of..
bones
(you cant tell calcium status from blood sample)
calcium def is a silent disease until..
elderly
rich sources of calcium
milk and milk products (best)
soy milk
broccoli
OJ
calcium def
bone mass peaks ~35 yrs
rickets
osteoporosis - fragile bones
how to decrease bone loss
exercise
adequate calcium
adequate vit D
estrogen replacement after menopause
second most abundant mineral in the body
phosphorus
phosphorus..
bone and teeth structure
major buffer
part of DNA and RNA
role in metabolism
phospholipids
high phosphorus decreases Ca absorption
sources of phosphorus
soft drinks
animal protein
legumes
dairy
fish
magnesium..
component of bones
important to enzymes
ATP metabolism
inhibits muscle contraction
inhibits blood clotting
prevents dental caries
protects against hypertension
sources of magnesium
dark green foods
legumes
whole grains
nuts
chocolate
principle cation outside of cell
sodium
sodium
maintains fluid and electrolytes balance, nerve transmission, muscle contraction
sources of sodium
processed foods,
salt
crucial in maintaining fluid and electrolyte balance
potassium
principle cation within body cells
potassium
K def and toxicity
rare
dehydration, diabetes, drugs
sources of K
fruit and vegs, meats milk whole grain
as processing increases, K __ and sodium __
decreases and and sodium increases
major anion outside cell
chloride
needed for fluid and electrolyte balance
chloride
chloride..
HCI in stomach
loss when vomiting
T/F sulfur is not used as a nutrient by itself
True but is part of other compounds
sulfur..
bridges in proteins, stabilizes shape
part of vitamins, biotin, and thiamin, and insulin
sulfur
affects skin, hair, and nails
sulfur
sulfur sources
most foods but fruit
metabolism
extraction of energy from food
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
catabolism
reactions that breakdown compounds into small units
anabolism
reactions that build complex molecules from smaller ones
__ is the metabolic processing center
cell
__ is the body's energy currency
ATP (form of energy cells use)
transport shuttles
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
T/F fat soluble vits are found in fatty foods
true
T/F most people can meet vit needs through food
true
T/F steaming is the best cooking method to retains vitamins in vegs
false
T/F carrots, winter squash, brocolli are good sources of vit A
false
T/F vit E keeps bones strong
false
T/F Consuming too much phosphorus interferes with calcium absorption
true
T/F Storing fat around the hips is as unhealthy as storing it around the waist
false
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