Nutrition Flashcards
define nutrition
the science devoted to the study of dietary needs for foods and the effects of food on organisms
define essential nutrients
nutrients that the body cannot make for itself and must be obtained from foods
define nonessential nutrients
nutrients that the body can make itself
define macronutrients
nutrients required by the human body in the greatest amounts: water, carbohydrates, protein and fats
define micronutrients
vitamins, minerals, and trace elements needed by the body in very small amounts
about _____ of your total daily calories should come from carbohydrates
50-60%
what is the carbohydrate RDA?
25-35 grams/day
what is the recommended daily intake for fruits and vegetables?
fruits → 2 cups daily
veggies → 2.5 cups daily
(based on 2000 calorie daily)
what is the difference between refined and whole grain?
refined → removes bran and germ from kernel and fiber and certain vitamins (needs to be enriched)
whole grain → entire grain kernel, contains some protein and is low calorie and nutrient dense
functionally complex carbohydrates produce _____ and ______ increase in blood glucose and insulin
low and slow
what are high glycemic index foods?
rapidly digested and absorbed foods resulting in a marked increase in blood glucose levels
what are low glycemic index foods?
slowly digested and absorbed foods that produce slow rise in glucose and insulin levels and have proven health benefits
T/F: low glycemic index foods have no impact on diabetics
FALSE
improve both glucose and lipid levels in ppl with DM I and DM II
beneficial for weight control as they control appetite and delay hunger
what is the difference between complete, incomplete and complementary proteins?
- complete → high quality source, contains all essential amino acids
- incomplete → low in one or more essential amino acids
- complementary → 2 or more incomplete protein sources that combine to provide all essential amino acids (rice and beans)
at what ages is the RDA of protein highest?
during periods of growth/development
infants (0-6 months, 7-12 months), pregnant women, and lactating women
what is the effect on blood glucose when fat is eaten with a carbohydrate?
together they can cause a slow rise in blood sugar and keep your blood sugar levels higher for a longer period of time once they do increase
list several essential functions of fats
- energy production and storage
- insulation and protection
- essential for proper digestion and absorption of food and nutrients
- cell membranes
- components of several important structural and functional molecules
- lipoproteins
- hormones
- signaling molecules
which is better saturated or unsaturated fats?
unsaturated
oils from plants, nuts, seeds, and many fish
what are some benefits of unsaturated fats?
- may limit LDL cholesterol when used in place of saturated or trans fats
- growing evidence that omega-3 and omega-6 :
- maintain brain and nerve function
- lower risk of heart disease
- protect against diabetes
- protect against Alzheimer’s, and other age-related brain decline
what types of fats should be limited?
saturated, trans fatty acids, and hydrogenated oils