Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
16 Cards in this Set
- Front
- Back
basic functions of nutrition
|
Antioxidants
H+/e- donors/acceptors (Cofactors) Hormones Coenzymes Gene transcription elements |
|
water soluble vitamins
|
absorbed in blood
transported freely very little storage excreted regularly in urine less likely to be toxic require frequent doses |
|
fat soluble vitamins
|
absorbed in lymph
transported by carriers stored in fat very little excreted more likely to be toxic require periodic doses |
|
folate
|
DNA synthesis and cell division
red blood cell maturation amino acid metabolism (homocysteine to methionine) works with B12 found in fortified grains, leafy green vegetables, legumes, seeds, liver |
|
folate deficiencies
|
megaloblastic anemia (results from impaired DNA synthesis in red blood cell production, cells are unable to divide)
neural tube defect (spina bifida, Birth defects that affect the neural tube, the structure that becomes the brain and spinal cord) anencephaly (the accumulation of too much cerebral spinal fluid in the spaces of the brain) |
|
vitamin B12
|
activates folate coenzyme for DNA synthesis
helps maintain proper nerve function found in Meat, poultry, fish, eggs, fortified soy milk, fortified cereal |
|
pernicious anemia
|
B12 deficiency due to poor absorption (decreases in stomach acid & intrinsic factor)
symptoms include megaloblastic anemia & neurological impairment |
|
thiamin
|
essential in carbohydrate metabolism and neural function
found in Whole grain, fortified, or enriched grain products, moderate amounts in all nutritious foods, specially high in pork |
|
thiamin deficiencies
|
Wernicke-Korsakoff's syndrome (heavy alcohol consumption with little food consumption leads to enlarged heart, muscular weakness, short-term memory loss, edema, weight loss)
Beriberi (wet: damage to cardiovascular system, edema. dry: damage to nervous system, muscle weakness) |
|
riboflavin
|
metabolism of carbohydrates, amino acids, lipids
supports cellular antioxidant protection destroyed by UV light but heat stable found in dairy products, whole grains, fortified or enriched grains, liver, dark green leafy vegetables are high per calorie |
|
riboflavin deficiency
|
ariboflavinosis (mouth/tongue inflammation, dermatitis, confusion)
|
|
niacin
|
required for biosynthesis of NADH/NADPH
needed for all aspects of metabolism (especially metabolism of glucose, fat, alcohol) found in Milk, eggs, meat, poultry, fish; whole-grain, fortified and enriched grain products, nuts, and all protein-containing foods |
|
pellagra
|
niacin deficiency
dementia, diarrhea, dermatitis, death Niacin in corn has poor absorption as it binds to complex carbohydrate (~70%) Corn high in leucine interferes with the tryptophan-to-niacin conversion |
|
niacin toxicity
|
niacin rush (Niacin Rush: a temporary burning/itching sensation when a person takes a 3-4 times RDA of nicotinic acid from supplement)
|
|
vitamin B6
|
amino acid/fatty acid metabolism
Growth, cognitive development, depression, immune function, fatigue, and steroid hormone activity found in Meats, fish, poultry, potatoes and other starchy vegetables, legumes, non-citrus fruits, fortified cereals, liver, soy products |
|
vitamin C
|
collagen synthesis as a cofactor
water-soluble antioxidant increase iron absorption in intestine |