Exam 3 Flashcards
What is cancer (general)
abnormal cells begin to grow out of control in the body
What causes cancer
damage to DNA
What are two important cells involved in cancer
oncogenes
proto-oncognes + tumor suppressor genes
What is an oncogene
cell that had the potential to cause cancer
This normally occurs in a cell with damaged DNA, but does not in a cancer cell
apoptosis
cells often travel to other parts of the body by getting into the bloodstream or lymph system is called
metastasis
Cancer rates
half of all men and one third of all women in the U.S. will develop cancer in their lifetime
Number one cancer in males
prostate
Number one cancer in females
breast
Number one cause of cancer death in males and females
lung and bronchus
Risk factors for cancer include (11) Note modifiable vs non-modifiable
Age family history tobacco use sunlight exposure radiation exposure chemical exposure viruses alcohol use poor diet lack of physical activity overweight/obese
This percent range of cancer is due to genetics
5-10%
Alcohol is known cause of cancers of the following
mouth throat voice box esophagus liver colon/rectum breast
List the 4 BMI ranges
< 18.5 = underweight
18.5-25 = healthy
>= 25 = overweight
>= 30 = obese
Someone who has a BMI in the obese range has this percent chance of dying prematurely
50-100% higher
T/F: increased body weight does not lower your chances of surviving cancer
F
Mechanisms by which obesity induces or promotes tumorigenesis can vary, but include
insulin resistance
chronic hyperinsulinaemia
increase bioavailability of steroid hormone
localized inflammation
Overweight and obese people have cancer rates that are strongly linked to the following
post-menopausal breast cancer colon cancer uterine cancer esophageal cancer kidney cancer
Steps to reduce risk of cancer (modifiable)
Maintain a healthy weight
stay physically active
eat a healthy diet
convincing evidence says that this decreases your risk of colon cancer
physical activity
convincing evidence says that this increases your risk of esophagus, colorectal, breast, uterine and kidney cancer
overweight and obesity
convincing evidence says that this increases your risk of oral cavity, liver, breast, and esophagus cancer
alcohol
This percent of americans reported taking a dietary supplement in the last month (2009)
52%
This are the most commonly used supplements
vitamins and minerals
These are often used after diagnosis of a health condition
botanicals
Why an increase in popularity of supplements
lack of confidence in the modern diet
aging population
increase in self-medication
increase in health awareness and disease prevention
People take supplements to do the following
improve nutrition make up for missing nutrients decrease risk of disease weight loss increase energy look better
DSHEA 1994
dietary supplement health and education act 1994
T/F: DSHEA affirmed that supplements are to be regulated similar to foods and set standards for regulation of dietary supplements
T
T/F: Due to DSHEA food and supplements have to prove they are safe to consume
F, they do not have to prove they are safe and must only defend safety
The dietary supplement and nonprescription drug consumer protection act of 2006 put into law that
manufacturers must report serious adverse events from their supplements
GMP, and what does it go into effect
good manufacturing practices 2007
by june 2010 all manufacturers must comply with GMP
GMP states that
products are to be produced in a quality manner
do not contain contaminants or impurities
accurately labeled
cleanliness of manufacturing plant
A supplement can have the following ingredients according to DSHEA
vitamin, mineral, herb or other botanical, and amino acids
supplements cannot be represented as this and must be labeled as this
conventional food or sole item of a meal or diet
“dietary supplement”
What must supplement labeling include (4)
must stat the product is a supplement
name and place of manufacturer, packer, or distributor
name and quantity of each ingredient
supplement facts panel
What else must be on a supplement label when present in measurable amounts
macro-nutrients vit a and c calcium iron sodium cholesterol
DSHEA allows dietary supplements to bear “statement of support” that
claim a benefit related to a classical nutritional deficiency disease
structure function claims
describe general well being from the ingredients
Number of days a claim must be made available to the FDA before its use on packaging
30 days
No claims are allowed for the following regarding supplements
diagnose prevent mitigate treat cure a disease
USP label shows this
standards have been met for quality, purity, identity and strength of supplements
What does the dietary guidelines for americans say about supplements (4)
use supplements to fill a specific nutrient gap
supplements cannot replace a healthful diet
supplements will not add additional health benefits to a nutritious diet
supplements may cause intakes to exceed safe levels of nutrients
MVM =
multivitamin/mineral supplement
MVMs are not effective in preventing this
chronic disease
Ca + Vit D is effective in preventing this
osteoporosis
Take care about exceeding ULs for the 4 following
Iron
zinc
vitamin A
Niacin
Use supplements in these situations
meet nutrient requirement treat a diagnosed deficiency during restricted energy intake for weight loss alcohol-dependance strict vegetarians/vegans pregnancy
This entity provides position papers regarding nutrient supplementation, functional foods, fatty acids, fiber, non-nutrient ingredients
Academy of Nutrition and Dietetics
How do whole grains fit into dietary guidelines for americans
food and food components to increase (whole)
food and food components to reduce (white)
Definition of whole grains
Whole grains or foods made from them containing all the essential parts and naturally-occurring nutrients of the entire grain seed
Enrichment
adding nutritive substances that were naturally present in the food but were removed during processing
fortification
added nutritive substances that are not naturally present in the food
All purpose flour has only this section of the grain seed
endosperm
Parts of the whole grain seed
endosperm
bran
germ
this part of the grain oxidizes easiy
germ
Bran
outer shell protects seed
fiber, B vitamins, trace minerals
endosperm
provides energy
carbohydrates, protein
Germ
nourishment for the seed
antioxidants, vitamin E, B vitamins
How can you determine if a grain product is a whole grain
first ingredient must be whole wheat, or whole grain
T/F: if a product is made from oats or brown rice, ingredients list does not need to say “whole”
T
What is the difference between the basic whole grain stamp and 100% whole grain stamp
The basic stamp must contain atleast 8 grams whole grain per serving, and can be used on products that contain some non-whole grain ingredients
The 100% stamp all grains ingredients must be whole grains, and contain atleast 16 grams of whole grains per serving
What requirements must a food product meet in order to have the FDA whole grain health claim on its label
Meet definitions for “low saturated fat and cholesterol”
< 6.5 g trans fat
What are the health benefits of whole grains
weight management CVD Type 2 diabetes gastrointestinal health cancer
What are the the components responsible for the health benefits of whole grains
fiber fat minerals vitamins (antioxidants) phytochemicals
Traditional whole grains
wheat
rice
corn
oats
Why is corn concidered a vegetable
folic acid
one of the first domesticated cerals
wheat
most important staple food for a large part of the world’s population
rice
Oats contain this which is very effective at lowering blood cholesterol
beta glucan fiber
This is a pseudograin with a nutty flavor
amaranth
this is a grain with a very tough hull, and has fiber distributed throughout the endosperm
barley
This is the seed of an herb and grows well in poor soils
buckwheat
THis is a dietary staple in asia and africa, and is prepared like rice
millet
This must be rinsed before cooking for this reason
quinoa
to remove saponins which block absorption of key nutrients
This and barley have a low glycemic index
Rye
This grows well in dry conditions, and can be eaten like popcorn, as porrige, ground into flour, and brewed into beer
sorghum
Gluten free grains (be able to name atleast 6)
teff sorghum buckwheat amaranth quinoa millet corn rice wild rice
Cooking directions for grains
1 cup dry = 3 cups cooked
bring water to a boil, add cereal, bring back to a boil, lower heat and simmer covered
Rinse in cold water until it runs clear
Look for this prior to cooking grains
debris
What are probiotics
live microorganisms which when administered in adequate amounts confer a health benefit
what is required for a product to be called a probiotic
must be alive when administered
must have undergone controlled evaluation to document health benefits in the target host
must be a taxonomically defined microbe
must be safe for its intended use
Most common strains of probiotic
lactobacillus
bifidobacteria
based on the science, what benefits can probiotics provide for the human host? (strong evidence)
lactose intolerance
prevention and treatment of diarrhea/constipation
based on the science what benefits can probiotics provide for the human host (Ok evidence)
IBD
allergy prevention
colon cancer prevention
based on the science what benefits can probiotics provide for the human hose? (weak evidence)
cholesterol lowering rheumatoid arthritis diabetes liver disease kidney stones
Know objectives from Gut initiative at UNL site in power point for probiotics (3)
- To understand the microbial factors that influence the ability of species to colonize the GI tract
- To understand host factors that shape the composition of the gut microbiome
- To understand how dietary and other environmental factors shapes composition of the gut microbiome.
What are prebiotics
a selectively fermented ingredient that allows specific changes, both in the composition and/or activity of the gastrointestinal microflora that confers benefits upon host well-being and health
Whare are the requirements for something to be considered a prebiotic
resists gastric acidity, hydrolysis by enzymes, and gastrointestinal absorption
is fermented by the intestinal microflora
stimulates selectively the growth and/or activity of intestinal bacteria associated with health and well-being
Potential health benefits of prebiotics
reduce risk of colon cancer reduce triglycerides and cholesterol levels boost immune system stabilize glucose levels improve mineral absorption and balance rid the gut of harmful microorganisms prevent constipation and diarrhea
T/F: more and stronger evidence for probiotics
F
What are the two sources of prebiotics in the diet
Fructo-oligosaccharides (FOS)Inulin
Galacto-oligosaccharides (GOS)
Sources of FOS and inulin
bananas onions garlic asparagus barley wheat chicory root commercial products
Side effect of inulin
gassy
sources of GOS in the diet
human breast milk
commercial products
Is dietary fiber considered a prebiotic
Some are (inulin, FOS, GOS) not all are, but research is starting to show that more are
Benefits of dietary fiber
normalize bowel movements maintain bowel integrity and health lower blood lipid levels helps control blood sugar aids in weight loss reduces colorectal cancer
How might the benefits of dietary fiber be mediated in humans
dietary fiber promotes beneficial bacteria that may impact a wide range of diseases and health issues
recommended amount of fiber per day
20-35 g/day
indians ait this much fiber, and third world countries eat this much
150-250g/day
70g/day
What aspects of the modern lifestyle have an impact on gut microbiota
low levels of fiber and fermented foods
increase in formula feeding
increase in antibiotic use
define free radicals
an atom or molecule that have one or more unpaired electrons
define antioxidants
react with free radicals and terminate free radical chain reactions
How do free radicals cause damage
interact with and damage DNA
What does free radical damage lead to
CVD cancer skin aging arthritis compromised immune function neurodegenerative disorders
What is the difference between an essential, and non-essential antioxidant
essential are needed in the diet
non-essential are made in the body
Give examples of exogenous antioxidants
Vitamin C, E
Selenium
Carotenoids (beta-carotene)
Polyphenols (flavonoids)
Difference between exogenous and endogenous antioxidants
exo- from outside
endo- from inside
Specific nuts that are good sources of selenium
brazil nuts
walnuts
health benefits of antioxidants
may reduce the risk of the following cancer CVD cognitive impairment alzheimer's disease immune dysfunction macular degeneration
What are some possible reasons for inconsistent findings regarding antioxidants and disease
not the right combination
bioavailabilty in natural form
processing of supplements may destroy effectiveness
What are the four groups of exogenous antioxidants
Vitamins
minerals
cartenoids
polyphenols
Good food source of vitamins c
peppers
tomatoes
kiwi
grapefruit
good food source of vitamin e
nuts
seeds
green leafy vegetables
egg yolks
good food source of carotenoids
carrots
tomatoes
dark leafy greens
sweet potatoes
good food source of minerals (selenium)
brazil nuts
walnuts
chicken
beef
good food source of polyphenols (flavonoids)
tea
red wine
fruits
vegetables
What are the goals of MNT for a person with diabetes
acheive and maintain blood glucose levels in the normal range
achieve a lipid profile that reduces the risk for CVD
Maintain blood pressure levels in the normal range
Who was the exchange system initially intended for
people with diabetes
Who uses the exchange program now
people who want to control weight and have a generally good diet plan
Why is the exchange system beneficial for diabetics
Because diabetes is more easily managed if food intake is similar on a daily basis.
How does the exhange system differ from MyPlate/MyPyramid?
serving sizes may be different
placement of foods may differ
can be used to develop a pattern for a certain calorie intake
What are the benefits of using the exchange system
provides framework to group foods
emphasizes important management concepts
variety of healthful food choices is ensured
provides a system of accountability
What are the disadvantages of the exchange system
best suited for those with at least a 9th grade education
not appropriate for those who do not understand the exchange concept
requires several educational sessions
Know page 4 of the exchange booklet
okay
How many servings or exchanges of each food group should be consumed for a 2000 calorie level diet
Milk 2 veggie 3 fruit 5 starch 11 meat (lean) 4 Fat 6
become familiar with the exchange booklet and be able to apply it to diet planning
okay
Be able to differentiate between type 1 and type 2 diabetes
okay
Watch video on diabetes in the cell
okay
Review handout on terms for diabetes (link on BB)
okay
Define osteoporosis
A childhood disease which manifests itself in adulthood
means porous bones
leads to weak bones
define osteopenia
low bone mineral density
define osteomalacia
softening of bones due to impaired bone mineralization
Why is osteoporosis a silent disease
no pain is usually associated with it
Osteoporosis is most often manifested by what
kyphosis, or curvature of the spine
define osteoblast
living cell in bone that builds bone
define osteoclast
living cell in bone that demineralizies bone to release Ca++ into the blood
Review the video on bone modeling (AMGEN)
okay
Describe bone remodeling
process by which bone is continually dismanteled and reformed to repair itself that occurs mainly in adults to maintain bone mass
Bone modeling/remodeling process is regulated by these
nutritional status
estrogen hormone status
parathyroid hormone levels
vitamin D status
In regards to bone mass what is the most critical state of bone formation and why
childhood through young adulthood
90% of total bone mineral content deposited by 18
When is peak bone mass reached
around 30
What are risk factors for osteoperosis, and know if they are modifiable and non-modifiable
smoking/alcohol abuse medication use diet exercise gender menstrual status hormone levels age body size ethnicity genetics
Preventing osteoporosis
adequate calcium and vitamin D intake additional nutrients which may enhance bone density or diminish bone density physical activity (weight bearing/resistance exercise)
These to ethnic groups tend to have higher BMD throughout their lives
African american and hispanic
RDA for calcium and vitamin D (19-49)
1000mg
400-800 IU
RDA for calcium and vitamin D (50+)
1200 mg
800-1000 IU
Factors that may reduce calcium absorption
Fiber and excess protein in the diet
factors that may increase calcium excretion
sodium
soft drinks
caffeine
protein
How can osteoporosis be prevented
stop smoking calcium vitamin d weight bearing exercise reduce alcohol medication (may interfer with calcium absorption) check your risk factors
How is it formed (vit d)
Formed from sun contact with skin
What food components inhibit calcium absorption
oxalic acid
phytate
calcium citrate
best absorption with least constipation
less dependent on stomach acid
taken any time of day (do not need meal)
calcium carbonate
needs acid to dissolve for absorption
taken at meals
children/young adults absorb as effectively as citrate
calcium citrate/malate
well absorbed supplement used to fortify beverages and juices
not found on shelves
Other nutrients that are important for bone health
Vitamin D Phosphorus magnesium fluoride vitamin K
Why is phosphorus important for bone health
calcium cannot make bone without phosphorus
85% found in the bone
low amounts of phosphorus result in bone demineralization and loss of calcium in the urine
Why is magnesium important for bone health
major role in bone cell function
60% found in bone
Why is fluoride important for bone health
99% found in bones and teeth
pharmacologic levels of fluoride can stimulate new bone formation
Rate of deposit into bone tissue most efficient in young children
Why is vitamin k important for bone health
required for bone specific protein made by osteoblasts (osteocalcin)
decreased bone turnover and decreased calcium excretion
Why is physical activity important for bone health
Weight bearing exercise enhances peak bone mass and slows bone loss
helps prevent fall-related fractures
is caffine a concern for people with osteoporosis
yes, increases Ca++ excretion
is protein a concern for people with osteoporosis
yes, increases Ca++ excretion
What is a normal range of Ca in the blood
8.5 mg/dl to 10.8 mg/dl
how much calcium is too much
2500 mg for adults
Complications of to much calcium include
lead to kidney stones
constipation
reduce absorption of zinc, iron, and copper
Food groups of the exchange program (7)
starch fruits milk/milk substitutes nonstarchy vegetables sweets protein fats
exchange program this symbol is for a good source of fiber
checkmark
exchange program extra fat is this symbole
exclaimation point
exchange program this is the symbol for added fat
double exclaimation point
exchange program this is the symbol for high in sodium
salt shaker
Exchange program, Carbs, protein, fat, calories: starch
15
3
1
80
Exchange program, Carbs, protein, fat, calories: Fruits
-
60
Exchange program, Carbs, protein, fat, calories: milk and milk substitues (fat-free, low-fat)
12
8
0-3
100
Exchange program, Carbs, protein, fat, calories: milk and milk substitutes (2%)
12
8
5
120
Exchange program, Carbs, protein, fat, calories: milk and milk substitutes (whole)
12
8
8
160
Exchange program, Carbs, protein, fat, calories: nonstarchy vegetables
5
2
-
25
Exchange program, Carbs, protein, fat, calories: sweets
15
varies
varies
varies
Exchange program, Carbs, protein, fat, calories: proteins (lean)
-
7
2
45
Exchange program, Carbs, protein, fat, calories: proteins (medium fat)
-
7
5
75
Exchange program, Carbs, protein, fat, calories: proteins (high fat)
-
7
8
100
Exchange program, Carbs, protein, fat, calories: proteins (plant based)
varies
7
varies
varies
Exchange program, Carbs, protein, fat, calories: Fats
5
45
Exchange program, Carbs, protein, fat, calories: alcohol (1 alcohol equivalent)
-
100