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Nutrition test one/SU
Chapter 1-4
231
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Undergraduate 2
10/07/2012

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Term
kcalorie (kcal)
Definition
energy content one food item
1 pound fat = 3500 kcal
Term
nutrient density
Definition
food that provide substantial amounts of vitamins and minerals and relatively few calories
Term
7 barriers to adequate nutrient intake
Definition
economic, cultural, physical, religious, ecologic, political, emotional
Term
what can the arm span measurement measure
Definition
estimate height
Term
what does elbow breadth measure
Definition
estimate frame size
Term
what order are ingredients listed on food label
Definition
in order of content
Term
7 approved health claims on food labels
Definition
high in fiber may reduce risk cancer/heart disease; high in Ca may prevent osteoporosis; folate decrease neural tube defects; soy reduce cardiovascular dis; low-fat reduce risk cancer+heart dis; low-sodium prevent HBP
Term
macronutrients
Definition
Carbohydrate=4kcal/g
Protein=4kcal/g
Fat=9kcal/g
Alcohol not considered macronutrient=7kcal/g
organic all contain carbon
all contain C H and O
Term
Carbohydrates
Definition
made up of glucose molecules C6H12O6
chief energy source for body cells (sugar and/or starch)
Term
what are two sources of carbohydrates
Definition
plants (from photosynthesis)
milk
Term
three basic forms of carbohydrates
Definition
sugar: monosaccharides and disaccharides
starch: polysaccharides
fiber: indigestible polysaccharide
Term
monosaccharides
Definition
(single sugars)
glucose=blood sugar
fructose=fruit/honey sugar
galactose=milk sugar byproduct
Term
disaccharides
Definition
(two sugars)
sucrose=table sugar
lactose=milk sugar
maltose=malt sugar
Term
glucose
Definition
major form of sugar in the blood
end product of most carbohydrate digestion
only fuel central nervous system can use
Term
fructose
Definition
found in fruits and honey
used in soft drinks/other processed foods
-high fructose corn syrup=cornstarch modified so that glucose is converted to fructose
Term
galactose
Definition
breakdown product of milk sugar
may be found in yogurt and cheese
least sweet of all monosaccharides
Term
sucrose
Definition
white table sugar
composed of glucose and fructose
added to candy/soda/fruit drinks/cakes/etc
not to exceed 25% of daily caloric intake
Term
lactose
Definition
occurs naturally in milk
composed of glucose and galactose
less sweet digested very slowly
Term
maltose
Definition
formed during starch digestion
found in malt and malt products (beer)
composed of 2 glucose molecules
Term
carbohydrates: starch
Definition
polysaccharides
at least 3 sugar links-multiple sugars
digests rapidly=w/in one hour
Term
what foods can carbohydrates(starch) be found in
Definition
grains, corn, pasta, beans and potatoes
low in fat; high in carbohydrates
Term
carbohydrates: fiber
Definition
dietary fiber
most complex carbohydrate
impossible to digest
DOES NOT add fuel or energy to diet
DOES add bulk
Term
soluble fiber
Definition
skin and seeds of plant foods
Term
insoluble fiber
Definition
pulp or gummy sections of plant foods
Term
glycemic index
Definition
effect of food on blood glucose levels
carbohydrates have the primary impact on glucose levels
glycemic carbs raise blood glucose (starches and sugars)
non-glycemic carbs do not raise
nutrisystem
Term
what are the functions are carbohydrates
Definition
human body prefers for fuel
spare use of protein as fuel
allow for more efficient use of fat for store energy
sugar=laxative effect; starch=economical and abundant source of fuel once digested into glucose; lactose=aid in absorption of calcium; fiber=promote normal intestinal function
Term
ketosis
Definition
rapid breakdown of body fat leading to acidic blood (need at least 100g/d of carbs to prevent)
Term
protein
Definition
building blocks for growth and repair
made from combination of amino acids
Term
food sources for protein
Definition
red and white meat and fish
eggs/milk and cheese
beans and nuts
Term
peptide
Definition
short chain amino acid
Term
essential amino acid (EAA)
Definition
cannot be synthesized by body; must be obtained from diet
Term
what are the eight essential amino acids (nine for children)
Definition
lysine, threonine, isoleucine, methionine, tryptophan, leucine, phenylalanine, valine
(histidine required for children)
Term
non-essential amino acids
Definition
can be synthesized by the body
Term
what are the 12 non-essential amino acids
Definition
alanine, cysteine, glycine, arginine, cystine, proline, asparagine, glutamic acid, serine, aspartic acid, glutamine, tyrosine
Term
isoleucine
Definition
branched-chain essential amino acid
promotes use of glucose by muscles
Maple Syrup Urine Disease (MSUD)
-genetic defect
-cannot metabolize isoleucine
-brain damage
Term
leucine
Definition
branched-chain amino acid
may help reduce body fat and increase metabolic rate
needs to be limited in individuals with MSUD
Term
valine
Definition
branched-chain essential amino acid
may help individuals with liver cirrhosis
Term
what are 3 branched-chain amino acids
Definition
isoleucine, leucine and valine
Term
methionine
Definition
EAA
primary source is animal protein
metabolized into taurine and homocysteine
contains sulfur
excess intake linked w/ bone loss, some chronic diseases
(cardiac, Alzheimers, diabetes)
Term
phenylalanine
Definition
EAA
found in aspartame (NutraSweet)
US infants are tested for phenylketonuria (PKU) at birth
-inability to metabolize phenylalanine to tyrosine
-causes mental deformations
*caution on food labels aimed at individuals w/ PKU
Term
tryptophan
Definition
EAA
found in high amounts in turkey and milk
precursor to the hormone serotonin
-promotes a 'good feeling' and helps induce sleep
Term
lysine
Definition
EAA
limited quantities in plant-based foods
vegans need to emphasize the EAA lysine
Term
foods to obtain lysine
Definition
grain, soy milk, nuts, legumes, vegetables, fruit
Term
limiting EAA of a vegan diet
Definition
lysine, methionine, tryptophan
Term
nitrogen balance
Definition
consuming enough protein to equal the amount of nitrogen lost in the urine and other secretions
Term
recommendations for daily protein intake
Definition
required amount is base on achieving nitrogen balance
adult: 0.8g protein/kg body weight (pounds=kg x 2.2)
Term
protein digestibility corrected amino acid scoring pattern
(PDCAAS)
Definition
scoring method to describe protein content of a food or commercial nutritional supplement with the goal of inclusion of all EAAs
Term
kwashiorkor
Definition
'sugar baby'
attributed to high-sugar, low-protein diet
infant has stunted growth, edema of hands and feet, fatty liver, moon face and dyspigmentation of skin and hair
Term
marasmus
Definition
protein-energy malnutrition
proteins used as energy source leaving little for growth and repair of tissues and maintain immune function
Term
fat (lipids)
Definition
great source of heat and source of energy for all cell
-except cells of nervous system and rbcs
spare protein for energy, add flavor to foods, provides satiety, promotes absorption of fat-soluble vitamins and protects body organs
Term
2 essential fatty acids for humans
Definition
omega-6 fatty acid: linoleic acid
omega-3 fatty acid: apha linolenic acid
Term
what type of fat is solid
Definition
saturated fat
Term
what type of fat is liquid
Definition
unsaturated fat (monounsaturated and polyunsaturated)
Term
what is saturated fat
Definition
fat molecule with no double bonds
example palmitic acid 16 carbons no double bonds C16:0
more hydrogen in fat more saturated it is
becomes so hard that you have to cut it
Term
examples of saturated fat in food
Definition
animal fats: butter and red meat
tropical fat: palm and coconut oil
brazil nuts are high in saturated fats
Term
what is a monounsaturated fat
Definition
fat molecule with ONE double bond
ex. oleic acid-18 carbons, one double bond
C18:1
liquid at room temp/solid at cold temp
Term
examples of monounsaturated fats in food
Definition
avocados, olive oil, canola oil, macadamia nuts
Term
polyunsaturated fats
Definition
fat molecule with TWO OR MORE double bonds
ex. gamma linolenic acid-18 carbons and 3 double bonds
C18:3
stays liquid form at cold temps
Term
examples of polyunsaturated fats in food
Definition
soybean oil, corn oil, fatty fish
Term
essential fatty acids
Definition
maintain cellular membrane function, fluidity and enzymatic activity
affect cholesterol metabolism
precursor for eicosanoids: protoglandin
-stimulates muscle and uterine contractions
-inflammation control
must be supplied in diet
Term
what foods can omega-3 fatty acids be found in
Definition
cold-water fish
-essential for brain development
plant forms include flax, walnuts and canola oil
Term
hydrogenated fat
Definition
unsaturated fatty acid (liquid oil) with added hydrogen molecules
makes the liquid more solid (spread or margarine)
Term
trans fat
Definition
unsaturated fatty acid with hydrogen molecules added on both sides of the double bond
texture is harder and linked to heart disease, metabolic syndrome and cancer
Term
triglycerides
Definition
fat with a glycerin (or glycerol) base and 3 fatty acids
main type of fat circulating in the bloodstream
Term
glycerine
Definition
small water-soluble carbohydrate
allows fats to transport through the bloodstream
contributes insignificant amounts of carbohydrates to the diet
Term
cholesterol
Definition
compound belongs to a group called sterols
fat-like substance not a kilocalorie source
found only in animal fat b/c produced in liver of animals
necessary for normal body functioning
saturated fats can encourage excess production of cholesterol by liver
unsaturated fats suppress the livers production of cholesterol
Term
cholesterol functions
Definition
component of bile salts that aid in digestion
essential component of all cell membranes
found in brain and nerve tissue and in blood
necessary for production of estrogen and testosterone
increases bodies production of vit D thru sun exposure
Term
what is EAR
Definition
estimated average requirement
the intake at which the risk of inadequacy to an individual is 50%; amount of nutrient is estimated to meet half of the person's needs
Term
what is RDA
Definition
recommended dietary allowance
the intake at which the risk of inadequacy is very small (2-3%)
Term
what is UL
Definition
upper intake level
at intakes between RDA and UL risks inadequacy and excess are both close to 0
at intakes above the UL the risk of adverse effects increase
Term
what is AI
Definition
adequate intake
is set based upon observations of nutrient intake and when an RDA can not be calculated; intake level is assumed to be adequate
Term
dietary deficiency
Definition
inadequate intake of a vitamin from food sources
Term
mild deficiency
Definition
abnormal biochemical blood and urine tests
Term
severe deficiency
Definition
appearance of clinical signs of deficiency disease
Term
what are fat soluble vitamins
Definition
A, D, E, K
Term
fat soluble vitamins
Definition
vitamins are stored in body fat
can reach toxic levels; dietary intake should not exceed UL
more stable & less prone to destruction by air/heat/light
absorption is enhanced by dietary fat
malabsorption of fat or low dietary intake of can cause deficiencies of fat-soluble vitamins
Term
cystic fibrosis
Definition
genetic defect that causes the body to produce abnormally thick mucus that builds up in the lungs, digestive tract and other areas of the body
water soluble forms of vit D and K can be supplemented
Term
what can cause fat malabsorption
Definition
cystic fibrosis
impaired pancreatic function
surgical removal of ileum
medications orlistat (Alli) or fat substitutes (Olestra) that inhibit the absorption of fat.
Term
name the water soluble vitamins
Definition
B and C
Term
what are water soluble vitamins
Definition
vitamins that dissolve in water and are not stored in body
need to be included in daily diet
Term
what may cause deficiencies of water-soluble vitamins
Definition
medications such as proton pump inhibitors and anti-epileptic medications
excess urination due to diuretic treatment or excess fluid intake
Term
what are two forms of vitamin A
Definition
carotene
retinol/retinol palmitate
Term
what is carotene and what foods is it found in
Definition
precursor which the liver uses to make vit a
dark green leafy vegetable/deep-orange vegetables and fruit
types of carotene: lycopene, lutein, zeaxanthin(phytochemical)
egg yolks: highly bioavailable source of lutein & zeaxanthin
Term
what is retinol and what can it be found in
Definition
preformed version of vitamin A
most toxic form/can be stored in body up to 2 yrs
fortified in food and found in supplements
whole milk, butter and egg yolks
Term
functions of vitamin A
Definition
retina health and night vision
promoting good immunity
maintaining skin health (epithelial tissue)
promoting bone growth
reproduction
preventing iron deficiency
Term
retinol toxicity
Definition
can cause birth defects (acne medication)
hypervitaminosis A
-causes bones to lose calcium
-calcium loss can lead to hypercalcemia
is linked with cheilosis
can cause liver disease
Term
what is cheilosis
Definition
vitamin A toxicity
painful inflammation and cracking of corners of mouth
depapillation of the tongue
Term
food with vitamin A
Definition
broccoli, butternut squash, spinach, cantaloupe, beet greens, chicken livers
Term
vitamin D
Definition
sun allows conversion in skin of cholesterol into vit D
dietary intake either from fortified foods or naturally found in fish
supplements
Term
functions of vitamin D
Definition
allows calcium absorption
needed for strong and healthy immune system
may help winter blues/SAD
helps regulate BP and acts as a tumor suppressant to prevent cancer
Term
vitamin D deficiency
Definition
bone loss
soft bones
secondary hyperparathyroidism
rickets
Term
rickets
Definition
vitamin D deficiency
bowing of legs caused by body weight & soft bones of growing children
cod liver oil replaced by vit D milk
Term
vitamin E; tocopherol
Definition
antioxidant: helps prevent cellular damage caused by oxidation
helps regulate cell signaling and gene expression
anticoagulants (Coumadin) can be affected by megadoses of vit E
Term
vitamin E toxicity and deficiency
Definition
impaired immunity
excessive blood thinning
deficiency associated with neurologic disorders & ataxia (loss of muscle coordination)
may be associated with inflammation
Term
vitamin E food sources
Definition
peanut butter, olive oil, safflower oil, sunflower seeds, almonds
Term
vitamin K/Phylloquinone
Definition
first recognized as antihemorrhagic factor:clotting
essential for the formation of prothrombin (clotting factor)
involved in vascular function and bone metabolism
synthesized by bacteria of small intestine
Term
vitamin K deficiency
Definition
defective blood clotting
-usually related to Coumadin
-anyone rcving antibiotic for long period and can't absorb fat
low dietary intake of K
intercranial hemorrhage(ICH)
Term
foods with vitamin K
Definition
green leafy vegetables, green tea, cauliflower, butter, soybean oil and beans
Term
B vitamins
Definition
easily destroyed with cooking
function as cofactors for cellular metabolism
needed for energy production in mitochondria
Term
Thiamin/vitamin B1
Definition
needed for carbohydrate metabolism, protein synthesis, DNA and brain chemicals
Term
Thiamine/vit B1 deficiency
Definition
neuropathy-nerve damage
beriberi-muscle wasting disease
wernickes encephalopathy-neurologic disorder
Term
food sources of thiamine/B1
Definition
fortified breads and cereals, fish, lean meats and milk
Term
Riboflavin/B2
Definition
involved in many cellular reactions that allow for energy use
important for healthy eyes, lips and tongue
Term
riboflavin/B2 deficiency
Definition
dermatitis, cheilosis, anemia, postpartum depression
Term
riboflavin/B2 food sources
Definition
enriched white flour products, fish, avocados, mushrooms
must have adequate milk consumption
Term
niacin/B3
Definition
needs can be met in part by its conversion from tryptophan
energy metabolism
nicotimamide
Term
niacin deficiency
Definition
poor dietary intake
alcohol abuse
malabsorption
medications used for tuberculosis
phenobarbital
Term
pellagra
Definition
syndrome caused by inadequate dietary niacin intake and/or tryptophan
characterized by 4 D's
diarrhea
dermatitis
dementia
death
Term
food sources of niacin/B3
Definition
dairy, poultry, fish, lean meat, nuts and eggs
Term
pantothenic acid/B5
Definition
involved in fatty acid metabolism and synthesis of certain body constituents
may help prevent cancer
Term
pantothenic/B5 deficiency symptoms
Definition
burning foot syndrome, headache, fatigue, poor muscle coordination, nausea and cramps
-causes reduction of an enzyme needed for neurologic health
-may cause weight loss and loss of sperm in semen
Term
food sources of B5/pantothenic acid
Definition
animal and animal products
whole-grain products
beans
Term
pyridoxine/B6
Definition
3 forms collectively known as B6
involved in 100 enzyme reactions
needed for production of neurotransmitters
antioxidant
promotes conversion of tryptophan to niacin
allows cysteine to be synthesized from methionine
Term
tardive dyskinesia
Definition
condition of impaired voluntary movement from long-term use of antipsychotic medication
B6 may offset
Term
pyridoxine deficiency/excessive intake
Definition
deficiency may cause depression from decreased production of serotonin from tryptophan
excess intake may cause irreversible nerve damage
Term
food sources of pyridoxine/B6
Definition
beef liver, turkey, chick peas, baked potato, sweet potato, broccoli
Term
Biotin/B8
Definition
sulfur containing vitamin
essential for enzymatic reactions in metabolism
essential for growth and development
healthy hair, skin, nails
bacteria in intestinal tract produce Biotin
Term
Biotin/B6 deficiency
Definition
can be caused by excess intake raw egg white
can be aggravated by pantothenic acid deficiency
symptoms
loss of appetite/nausea and vomiting/hair loss/dermatitis
Term
food sources of biotin
Definition
meats, milk, soybean and soybean flour, brewers yeast, egg yolk
Term
folate/B9
Definition
DNA synthesis
promotes chromosomal health
formation of rbcs
helps prevent spina bifida
Term
folate deficiency
Definition
causes megaloblastic anemia
deficiency can occur with use of antiepileptic Rx
allergies
clinical depression
Term
excessive folate/B9 intake
Definition
mask B12 deficiency
reduced zinc absorption
Term
sources for folate
Definition
soy nuts, chicken liver, avocado and broccoli
Term
cobalamin/B12
Definition
contains the mineral cobalt
important in DNA synthesis
Term
B12 deficiency
Definition
irreversible nerve damage
megaloblastic anemia
pernicious anemia
enlarged spleen
cognitive impairment
Term
megaloblastic anemia
Definition
enlarged red blood cells
Term
pernicious anemia
Definition
decrease in red blood cells that occurs when your intestines cannot properly absorb B12
Term
B12 status should be monitored in
Definition
vegetarians/vegans/PKUers-anyone on low protein diet
surgery of ileum/gastric bypass
elder population
persons using proton pump inhibitors for reflux
those w/ signs/symptoms of altered mental state
those at risk of malnutrition (alcoholics)
Term
food sources for cobalamin/B12
Definition
beef liver, beef, haddock, eggs
Term
choline
Definition
needed for nerve function, lipid metabolism & cell membrane function
deficiency symptoms=fatty liver/liver failure/mitochondrial dysfunction
food sources=meat/eggs/wheat germ/soybeans/peanut butter
Term
vitamin C
Definition
ascorbic acid
water-soluble derivative of glucose
aids in formation and maintenance of tooth dentin/bones/cartilage/connective tissue/blood vessels
promotes skin integrity and wound healing
-recovery from surgery-prevention of infection
Term
vitamin C deficiency
Definition
scurvy
mild=bleeding gums/loose teeth/easy bruising
severe=internal bleeding/death
Term
vitamin C food sources
Definition
found in fruits and vegetables only
leafy greens, citrus, melons, potato, green pepper, berries, tomatoes
Term
list four fat-soluble vitamins
Definition
A, D, E, K
Term
name the B vitamins
Definition
thiamine(B1), riboflavin(B2), niacin(B3), pantothenic acid(B5), pyridoxine(B6), biotin(B8), folate(B9), cobalamin(B12)
Term
list two functions of vitamin A
Definition
retina health and night vision
promoting good immunity
Term
list two functions of vitamin D
Definition
allows calcium absorption
needed for strong and healthy immune system
Term
two functions of vitamin E
Definition
help prevent cellular damage by oxidation
helps regulate cell signaling and gene expression
Term
two functions of vitamin K
Definition
involved in vascular support and bone metabolism
Term
what is main role of all B vitamins
Definition
function as cofactors for cellular metabolism
Term
what is another name for vitamin C
Definition
ascorbic acid
Term
which two food groups are the only sources for vitamin C
Definition
fruits and vegetables
Term
can you name two signs of vitamin C deficiency
Definition
bleeding gums, loose teeth
Term
can you name 5 examples of carotene-rich foods
Definition
spinach, broccoli, carrots, kale, beet greens
Term
what is a food source of preformed vitamin A
Definition
egg yolks
Term
can you name at least one food example for each of the other 3 fat-soluble vitamins
Definition
vitamin D - salmon
vitamin E - spinach
vitamin K - cauliflower
Term
what are main food sources of vitamin B
Definition
milk, eggs, peanuts, meats
Term
what are the main food sources of vitamin B2
Definition
fish, avocados, mushrooms
Term
what are the main food sources of vitamin B12
Definition
beef liver, beef, haddock, eggs
Term
what are the main food sources of folate
Definition
chicken liver, avocado, broccoli, soy nuts
Term
can you list at least 3 rich food sources for vitamin C
Definition
leafy greens, citrus, melons, green peppers, berries
Term
what are general functions of minerals
Definition
building materials, regulators, all minerals are indestructible (microscopic rocks), can be leeched out of foods from excess water in cooking/steaming is advised
Term
major minerals
Definition
minerals found in large amounts
calcium, magnesium, phosphorus, potassium, sodium
Term
trace minerals
Definition
minerals in the body in amounts < 5g
Term
calcium
Definition
99% is found in bones and teeth
allows for muscle contraction
vit D required for proper absorption & use dietary Calcium
Term
calcium deficiency
Definition
poor bone growth and tooth density
stunted body growth
rickets
poor clotting
Term
osteoporosis risk factors
Definition
thinning of bone tissue and loss of bone density/low calcium or vit D intake/low body weight/rheumatoid arthritis/steroid use/smokers/alcoholics
Term
tetany
Definition
caused by low levels of calcium
condition of muscle twitches, cramps and convulsions
Term
causes of low calcium level
Definition
celiac disease, hypoparathyroidism, certain kidney diseases, low serum protein
Term
celiac disease
Definition
a condition that damages the lining of the small intestine and prevents it from absorbing parts of food that are important for staying healthy
Term
hypoparathyroidism
Definition
endocrine disorder in which the parathyroid glands in the neck do not produce enough parathyroid hormone
Term
causes of high calcium levels
Definition
hyperparathyroidism/poor vitamin D status
Term
calcium food sources
Definition
milk, soybeans, bones(i.e. salmon/anchovies), some leafy green collards, seaweed, hard water
Term
Magnesium
Definition
critical for DNA and protein synthesis and muscular contractions and relaxation
involved in strong bone formation;bone stability
involved in energy metabolism, production of fatty acids and all hormone reactions
transports calcium and potassium in and out of cells
Term
magnesium deficiency
Definition
can be lost w/ diuretics & excess urination
low potassium and low calcium contribue to poor absorption
Term
high levels of magnesium cause
Definition
renal failure
excess intake of laxatives & antacids that contain Mg
Term
magnesium food sources
Definition
chlorophyll containing foods-green leafy veggies
legumes, fish, whole grains, nuts
Term
phosphorus
Definition
helps enzymes act in energy metabolism
primarily found in bones
found in meat, milk, beans, added to carbonated beverages
deficiency is rare
Term
potassium
Definition
electrolyte
promotes regular heartbeat
critical for enzyme reactions and protein synthesis
Term
electrolyte
Definition
a substance that conducts electric flow through the body
Term
food sources of potassium
Definition
avocado, prune juice, tomato juice, black beans, chick peas, kidney beans, potatoes, lentils
Term
sodium
Definition
serves as an essential electrolyte
major source=table salt(NaCl)
Term
chloride
Definition
serves as an electrolyte
found in gastric juice as part of hydrochloride acid
deficiency found only in conjunction w/ sodium depletion
excess levels due to dehydration
Term
chromium
Definition
two forms-3+ and 6+
important for carbohydrate and lipid metabolism
food sources=meats, whole grains, legumes, dairy products
Term
copper
Definition
aids in the absorption of iron
production and survival of red blood cells
involved in maintenance of cardiovascular system & immune system
Term
wilsons disease
Definition
genetically inherited form of copper toxicity
neuropsychiatric systems, liver disease, reduction in growth and impaired reproduction
Term
food sources of copper
Definition
blackstrap molasses, beef liver, oyster, cashews, white beans
Term
fluorine
Definition
referred to as fluoride
formation of strong bones and teeth, reduces dental carries(tooth decay), aids calcium in bone formation
Term
iodine
Definition
found in thyroid hormones involved in metabolism
common sources=salt and saltwater fish
Term
iron
Definition
tissue respiration/hemoglobin synthesis
food sources=red meat, chicken, turkey, eggs
Term
manganese
Definition
essential for normal bone structure, reproduction & central nervous system
food sources=macadamia nuts, pine nuts, hazelnuts, pecans, pecans, chickpeas, spinach, blackberries, pineapple
Term
molybdenum
Definition
important for normal cell functioning
food sources=meats, legumes, milk, whole grains
Term
selenium
Definition
antioxidant that helps prevent skin damage from sun exposure
food sources=beef liver, eggs, oatmeal
Term
zinc
Definition
antioxidant that plays a role in protein synthesis/promotes cell division and differentiation
essential for proper immune function
stored in bone
Term
food sources for zinc
Definition
peas, green beans, beef, chicken, broccoli
Term
cobalt
Definition
essential component of cobalamin(B12)
found on animal foods: meat, fish, eggs and milk
Term
sulfur
Definition
found in amino acids; protein-rich foods are the primary source
component of skin, hair, nails & cartilage
found in breast milk
3rd most abundant mineral in body
Term
phytochemicals
Definition
nutrients in food that are not vitamins or minerals but are essential to health
lutein and lycopene
avocados=lutein
Term
fortification
Definition
add nutrients that are generally not present
add nutrients in higher amounts than naturally occur
-add calcium to orange juice
-folic acid added to white flour products
Term
enrichment
Definition
replace known nutrients lost in processing
enriched white flour products with B-vitamins and iron
replace what was removed from the removal of whole grain during the processing
Term
supplements
Definition
supplement manufactures do not need FDA approval to market
no regulation
Term
USP
Definition
united states pharmocopia
analyze supplement contents for labeling
USP on label if has been chemically analyzed
Term
what are two types of food digestion
Definition
simple and complex
Term
where is the primary site of food absorption
Definition
small intestine
Term
what are the stages of swallowing
Definition
1st-oral-voluntary
2nd-pharyngeal-involuntary
3rd-esophageal-involuntary
Term
what is digestion
Definition
process in which food is changed from a complex form to a simpler form
process of digestion occurs simultaneously
Term
what is mechanical digestion
Definition
food broken into smaller particles (mouth)
mixed with digestive juices (stomach)
Term
what is peristalsis
Definition
rhythmic movements that propel food through the digestive tract
Term
what is chemical digestion
Definition
digestive enzymes change food nutrients into smaller forms
carbohydrates to simple sugars
proteins to amino acids
fats to fatty acids and glycerol
Term
what does not require digestion
Definition
water, simple sugars, salts, vitamins and minerals
Term
what is the metabolic process
Definition
nutrients are used at the cellular level for energy
the liver reassembles nutrients into molecules and structures
metabolic enzymes are necessary/vitamins and minerals are needed for function
Term
what are digestive enzymes for carbohydrates
Definition
salivary amylase to starch
lactase to lactose
sucrase to sucrose
maltase to maltose
Term
what is the digestive enzyme for protein
Definition
proteases to gastric amylase to protein
pepsin trypsin to polypeptides
Term
what are the digestive enzymes for fat
Definition
lipases+pancreatic lipase to fat
bile promotes fat digestion
Term
how does bile aid in digestion
Definition
bile is excreted from the liver into the gallbladder(bile storage)
after a meal containing fat, bile is released into the small intestine so that it can digest fat
Term
metabolism
Definition
nutrients are used to produce energy ATP water and CO2
takes place in all cells of the body(mitochondrial cells)
Term
catabolism
Definition
breaking down that results in release of energy
use of glucose, amino acids and fatty acids to make energy
Term
anabolism
Definition
reactions that build up new substances
cells use nutrients to build and repair the body's tissue
Term
basal metabolic rate
Definition
amount of energy (kcal) required for basic processes of life
Term
how do you calculate basal metabolic rate
Definition
multiply weight in kilograms by 0.9 for women or 1.0 for men then multiply by 24 (hours in a day)
Term
water
Definition
found in cells/blood/secretion
needed for saliva/gastric secretions
help with swallowing
allows loss of waste and toxins
need to ingest 2L/day
absorbed in large intestine
Term
monosaccharide digestion
Definition
glucose/galactose/fructose-don't require digestion
ready for absorption in digestive tract
Term
disaccharide and starch digestion
Definition
require digestion/begins in mouth (ptyalin:amylase enzyme)
then monosaccharides absorbed in small intestine
Term
fiber digestion
Definition
indigestible-passes thru intestinal tract unchanged
intestinal bacteria allow some fiber digestion with the bacteria giving off hydrogen and methane gases in the process referred to as flatus
Term
probiotics
Definition
bacteria that help with digestion
found in yogurt and buttermilk
Term
lactose intolerance
Definition
inability to digest lactose
-encourage low-fat yogurt and cheese
Term
protein digestion and absorption
Definition
begins in mouth with chewing-mechanical
chemical=begins in stomach and ends in small intestine
hydrochloric acid prepares protein for enzymatic breakdown
once proteins are digested, absorption into the bloodstream occurs in small intestine
Term
what are enzymes for protein digestion
Definition
protease, pepsin and trypsin
Term
fat digestion and absorption
Definition
insoluble in water; need special treatment by GI tract
glycerol + fatty acids
no digestion in mouth
bile used for fat digestion
Term
diverticulosis
Definition
formation of pouches or small sacs protruding from the large intestine
caused by low fiber diets
increased fiber can prevent and manage
soluble fiber helps prevent worsening
Term
celiac disease
Definition
genetic autoimmune condition that leads to malabsorption
multiple nutrient deficiency can exist due to malabsorption from villi atrophy
conditions related to deficiencies of minerals/water soluble vitamins/protein due to damage to duodenum and jejunum areas.
Term
food intolerance versus allergy
Definition
allergy can cause death, intolerance not life-threatening
Term
the liver
Definition
involved in metabolism and storage of macronutrients, micronutrients and minerals after digestion and absorption completed
Term
hepatitis
Definition
inflammation and injury to liver cells
-symptoms: anorexia/fatigue/nausea/vomit/fever/diarrhea/wght loss
Term
cirrhosis
Definition
chronic liver disease
normal liver tissue is replaced by inactive fibrous tissue
jaundice: bile build-up/yellowing of skin
fatty liver
low albumin levels(blood protein)
symptoms-ascites:accumulation of fluid in abdomen
hepatic coma: altered consciousness related to toxin build-up
Term
gallbladder
Definition
stores and releases bile for fat digestion
Term
causes of gallstones
Definition
excess calories
simple sugar
saturated fat
Term
pancreas
Definition
digestive enzymes for carbohydrate, protein and fat digestion
Term
pancreatitis
Definition
inflammation of the pancreas
digestion of pancreatic tissue by its own pancreatic digestive enzymes
low fat diet recommended
Term
cystic fibrosis
Definition
excessive thick mucus that inhibits digestion
fats are poorly digested and absorbed
give pancreatic enzyme pills at mealtimes
Term
effects of excess alcohol on digestion, absorption and metabolism
Definition
erosions of GI tract leading to impaired digestion and malabsorption
altered appetite w/ reduced food intake, leading to malnutrition
liver damage w/ impaired protein metabolism
pancreatic damage causing reduced insulin production and reduced ability to digest dietary fat
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