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Nutrition Ch. 12/13
water and major minerals, trace minerals
90
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Undergraduate 1
06/01/2010

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Term
magnesium and hypertension
Definition
seems to protect against hypertension.
Term
magnesium deficiency
Definition
rarely appears except with diseases. may be associated with alcohol abuse, protein malnutrition, kidney disorders and prolonged vomiting or diarrhea. (may cause hallucinations)
Term
hard water
Definition
usually higher in magnesium, usually residents have lower hypertension rates.
Term
magnesium role in the body
Definition
a cation within the body's cells, active in many enzyme systems. important for bones.
Term
phosphorus in the body
Definition
2nd most abundant mineral in the body. part of the buffer system, bilayer, atp, some proteins contain phosphorus
Term
phosphorus and calcium
Definition
phosphorus accompanies calcium both in the crystals of bone and in many foods such as milk. phosphorus is also important in energy metabolism, DNA/RNA
Term
sources of phosphorus
Definition
all animal tissues (meat, fish poultry, eggs, milk)
Term
sulfate
Definition
the oxidized form of the mineral sulfur, as it exists in food and water.
Term
sulfur and proteins
Definition
the body receives sulfate from the amino acids methionine and cysteine found in dietary proteins. these help build di-sulfide bridges in proteins.
Term
sources of sulfur
Definition
all protein containing foods (meats, fish, poultry, eggs, milk, legumes, nuts)
Term
calcium sources
Definition
milk and milk products, small fish (w/bones), tofu, greens, legumes
Term
potassium sources
Definition
all whole foods; meats, milks, fruits, vegetables, grains, legumes
Term
chloride sources
Definition
table salt, soy sauce, moderate amounts in meats, milks eggs, large amounts in processed foods.
Term
sodium sources
Definition
table salt, soy sauce, moderate amounts in meats, milks, breads, and vegetables; large amounts in processed foods.
Term
most of the body's magnesium can be found in the:
Definition
bones
Term
t or f, phosphorus assists in the clotting of blood.
Definition
false. However, it does help with energy metabolism, transport of lipids and bone and teeth formation.
Term
calcium absorption is hindered by
Definition
oxalates
Term
calcium homeostasis depends on:
Definition
vitamin D, calcitonin and parathyroid hormone.
Term
the role of chloride in the stomach is to help
Definition
maintain a strong acidity
Term
the principal cation in extracellular fluids is:
Definition
sodium
Term
the distinction between the major and trace minerals reflects the
Definition
amounts of their contents in the body.
Term
regulation of fluid and electrolyte balance and acid-base balance depends primarily on the:
Definition
kidneys
Term
the body generates water during the:
Definition
breakdown of energy nutrients.
Term
interstitial fluid
Definition
fluid between the cells, usually high in sodium and chloride. makes up a large portion of the extracellular matrix.
Term
intracellular fluid
Definition
fluid within the cells usually high in potassium and phosphate. accounts for about 2/3 of the body's water.
Term
extra cellular fluid
Definition
fluid outside the cells. comprised of the interstitial fluid and plasma. accounts for 1/3 of the body's fluids.
Term
water balance
Definition
refers to intake and output of water.
Term
obligatory water excretion
Definition
about 500ml or 2 cups
Term
the role of renin
Definition
cells in the kidneys respond to low bp by releasing this enzyme, renin causes the kidneys to reabsorb sodium increasing blood pressure and blood volume.
Term
hard water
Definition
water with a high calcium and magnesium content.
Term
soft water
Definition
water with a high sodium or potassium content
Term
ADH or anti-diuretic hormone
Definition
when extracellular fluid becomes too concentrated or when blood volume or blood pressure falls too low ADH is released and the kidneys reabsorb water.
Term
angiotensin
Definition
a powerful vasoconstrictor protein which raises blood pressure
Term
aldosterone
Definition
a hormone from the adrenal glands that signals the kidneys to retain more sodium
Term
adrenal glands
Definition
glands adjacent to and just above each kidney
Term
milliequivalents, Meq
Definition
the concentration of electrolytes in a volume of solution. meq are a useful measure when considering ions because the number of charges reveals characteristicsa bout the solution that are not evident when the concentration is expressed in terms of weight.
Term
t or f: electrolytes attract water
Definition
true.
Term
osmosis
Definition
the movement of water across a membrane toward the side where the solutes are more concentrated.
Term
osmotic pressure
Definition
the amount of pressure needed to prevent the movement of water across a membrane.
Term
solutes
Definition
the substances dissolved in a solution.
Term
carbonic acid
Definition
a compound that results from the combination of CO2 and water; of particular importance in maintaining the body's acid base balance.
Term
bicarbonate and carbonic acid
Definition
protect the body against changes in acidity by acting as buffers--these substances neutralize acids and bases.
Term
binders
Definition
chemical compounds in foods that combine with nutrients to form complexes that the body cannot absorb.
Term
sodium and bone loss
Definition
a high salt intake is also associated with increased calcium excretion, but it's influence on bone loss is less clear.
Term
parathyroid hormone
Definition
a hormone from parathyroid glands that regulates blood calcium by raising it when levels fall too low; aka parathormone
Term
calcitonin
Definition
a hormone secreted by the thyroid gland that regulates blood calcium by lowering it when levels rise too high.
Term
calcium rigor
Definition
hardness or stiffness of the muscles caused by high blood calcium concentrations.
Term
calcium tetany
Definition
intermittent spasms of the extremities due to nervous and muscular excitability caused by low blood calcium concentrations.
Term
hydroxyapatite
Definition
crystals made of calcium and phosphorus
Term
heme
Definition
the iron holding part of the hemoglobin and myoglobin proteins. 40% in meat, fish and poultry is bound into heme. other 60% is non-heme.
Term
transferrin
Definition
the iron transport protein
Term
myoglobin
Definition
the oxygen holding protein of the muscle cells
Term
ferritin
Definition
the iron storage protein.
Term
hemoglobin
Definition
the oxygen carrying protein of teh red blood cells that transports oxygen from the lungs to tissues throughout the body. hemoglobin accounts for 80% of the body's iron.
Term
MFP factor
Definition
peptide released during the digestion of meat, fish and poultry that enhances nonheme iron absorption.
Term
hepcidin
Definition
a hormone produced by the liver that regulates iron balance
Term
hemosiderin
Definition
an iron storage protein primarily made in times of iron overload.
Term
iron-deficiency anemia
Definition
severe depletion of iron stores that results in low hemoglobin and small, pale red blood cells.
Term
microcytic
Definition
a type of anemia that impairs hemoglobin synthesis
Term
erythrocyte protoporphyrin
Definition
a precursor to hemoglobin
Term
hematocrit
Definition
measurement of the volume of the red blood cells packed by centrifuge in a given volume of blood.
Term
hemochromatosis
Definition
a genetically determined failure to prevent absorption of unneeded dietary iron that is characterized by iron overload and tissue damage.
Term
hemosiderosis
Definition
a condition characterized by the deposition of hemosiderin in the liver and other tissues.
Term
excess iron and cancer
Definition
free radical theories, encourage high fiber diets that bind to iron making it less likely to go rouge.
Term
contamination iron
Definition
iron found in foods as the result of contamination by inorganic iron salts from iron cookware
Term
t or f: bioavailability of iron is highest in meats.
Definition
true.
Term
chelate
Definition
a substance that can grasp the positive ions of a mineral.
Term
metalloenzymes
Definition
enzymes that contain one or more minerals as part of their structures
Term
metallothionein
Definition
a sulfur rich protein that avidly binds with and transports such metals as zinc.
Term
enteropancreatic circulation
Definition
the circulatory route from the pancrease to the intestine and back to the pancreas.
Term
mucosal cells in the intestine store excess:
Definition
zinc and metallothionein.
Term
the pancrease uses ___ to make digestive enzymes and secretes them into the intestine.
Definition
zinc.
Term
sources of zinc
Definition
protein containing foods, red meats, shellfish, whole grains, fortified cereals.
Term
goiter
Definition
an enlargement of the thyroid gland due to an iodine deficiency, malfunction of the gland or overconsumption of a goitrogen.
Term
goitrogen
Definition
a substance that enlarges the thyroid gland and causes toxic goiter. these occur naturally in cabbage, kale, brussels sprouts, cauliflower etc.
Term
cretinism
Definition
a congenital disease characterized by mental and physical retardation and commonly caused by maternal iodine deficiency during pregnancy.
Term
a heart disease associated with selenium deficiency
Definition
keshan disease.
Term
t or f: selenium is an antioxidant
Definition
true.
Term
copper
Definition
a constituent of several enzymes. typical diets in the US do not see deficiency. low coper may contribute to heart disease.
Term
manganese sources:
Definition
seafood, nuts, whole grains, seeds, legumes
Term
manganese roles:
Definition
cofactor for many enzymes. deficiency is rare because it is in everything. toxicity is unlikely to come from diet. miners who ingest manganese dust have brain disease.
Term
fluorapatite
Definition
the stabilized form of a bone and tooth crystal in which fluoride has replaced the hydroxyl groups of hydroxyapatite.
Term
fluorisis
Definition
discoloration and pitting of tooth enamel caused by excess fluoride during tooth development. *toxicity
Term
sources of fluoride:
Definition
drinking water, tea, seafood
Term
chromium
Definition
maintains glucose homeostasis by enhancing activity of insulin
Term
chromium sources:
Definition
unrefined foods, liver, brewers yeast, whole grains
Term
chromium supplements
Definition
advertisements claim that they can help you lose fat and build muscle. controversial.
Term
glucose tolerance factors (GTF)
Definition
small organic compounds that enhance insulin's action. some are found in chromium.
Term
molybdenum
Definition
acts as a working part of several metalloenzymes. deficiency is unknown. toxicity is rare. significant sources are legumes, cereals, nuts.
Term
heavy metals
Definition
mineral ions such as mercury and lead, so called because they are of relatively high atomic weight. many are poisonous.
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