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Amino Acids
Nutrition
29
Biology
Not Applicable
02/25/2009

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Term
Histidine
Definition
ESSENTIAL (to choldren?): essential for the growth and repair of tissues; important for the maintenance of the myelin sheaths, which protect nerve cells; is needed for the production of both red and white blood cells; protects the body from radiation damage; lowers blood pressure, aids in the removal of heavy metals from the body; aids in sexual arousal.
Term
Phenylalanine
Definition
ESSENTIAL: Used by the brain to produce norepinephrine, a chemical that transmits signals between nerve cells in the brain; promotes alertness and vitality; elevates mood; decreases pain; aids memory and learning
Term
Isoleucine
Definition
ESSENTIAL: needed for hemoglobin formation; stabilizes and regulates blood sugar and energy levels; is valuable to athletes because it aids in the healing and repair of muscle tissue, skin and bones; has been found to be deficient in people suffering from certain mental and physical disorders.
Term
Lysine
Definition
ESSENTIAL: Ensures adequate calcium absorption and maintains a proper nitrogen balance in adults; helps form collagen (which makes up cartilage and connective tissue); aids in the production of antibodies which have the ability to fight cold sores and herpes outbreaks; lowers high serum triglyceride levels.
Term
Methionine
Definition
ESSENTIAL: A powerful anti-oxidant and a good source of sulfur, which prevents disorders of the hair, skin, and nails; assists the breakdown of fats, thus helping to prevent a buildup of fat in the liver and arteries, that might obstruct blood flow to the brain, heart, and kidneys; helps to detoxify harmful agents such as lead and other heavy metals; helps diminish muscle weakness; prevents brittle hair; protects against the affects of radiation; beneficial for women who take oral contraceptives because it promotes the excretion of estrogen; reduces the level of histamine in the body which can cause the brain to relay wrong messages;
Term
Threonine
Definition
ESSENTIAL: Helps maintain proper protein balance in the body; is important for the formation of collagen, elastin and tooth enamel; aids liver and Lipotropic function when combined with Aspartic Acid and Methionine; prevents the buildup of fat in the liver; assists metabolism and assimilation.
Term
Tryptophan
Definition
ESSENTIAL: A natural relaxant, helps alleviate insomnia by inducing normal sleep; reduces anxiety and depression and stabilizes mood; helps in the treatment of migraine headaches helps the immune system function properly; aids in weight control by reducing appetite; enhances the release of growth hormones;
Term
Valine
Definition
ESSENTIAL: Is needed for muscle metabolism and coordination, tissue repair, and for the maintenance of proper nitrogen balance in the body; used as an energy source by muscle tissue; helpful in treating liver and gallbladder disease; promotes mental vigor and calm emotions.
Term
Leucine
Definition
ESSENTIAL: Works with Isoleucine and Valine to promote the healing of muscle tissue, skin, and bones; is recommended for those recovering from surgery; lowers blood sugar levels; aids in increasing growth hormone production.
Term
What kind of amino acids are legumes low in? High in?
Definition
Low: sulfer containing amino acids such as methionine and cysteine. High: lysine
Term
What should grains be paired with and why?
Definition
Legumes. They have the opposite amino acid profile. Legumes=high in lysine, low in sulfur containing amino acids. Grains:
Term
What is a non essential amino acid? How many are there?
Definition
Amino acids that are manufactured by the body and therefore don't need to be supplied by daily food intake. There are 12.
Term
What is an essential amino acid?
Definition
Amino acids that cannot be manufactured by the body and therefore must be consumed daily in food.
Term
What is a complete protein?
Definition
A protein that contains all the essential amino acids.
Term
Name 6 vegetarian sources of complete protein.
Definition
soy, hemp seed, spirulina, amaranth, buckwheat, quinoa.
Term
Do complementary proteins have to be consumed at the same meal?
Definition
Not necessarily. Within 24-48 hours is sufficient.
Term
What are complementary proteins?
Definition
Foods that, when combined, contain all the essential amino acids.
Term
Name the three combinations that make complete proteins.
Definition
Grains and Legumes; Legumes and Nuts; Grains and Nuts
Term
What are the sulfur-containing amino acids?
Definition
methionine and cysteine
Term
What are the aromatic amino acids?
Definition
phenylalanine and tyrosine
Term
What are limiting amino acids? How many are there?
Definition
They are the essential amino acids that are more difficult to get. If they are deficient they limit the usefulness of the others. There are 3: tryptophan, lysine, methionine and/or cysteine (the sulfue containing ones)
Term
Why are the sulfur-containing and aromatic amino acids grouped together?
Definition
Because if the body lacks one, it can change part of the excess into the other amino acid....one can be produced from the other.
Term
What are legumes? Name 5 example?
Definition
A plant that develops from a single carpel and opens on each side. They are noteworthy for their ability to fix nitrogen in soil. EX: peas, beans, lentils, peanuts, alfalfa
Term
What amino acids are beans high in that grains are low in?
Definition
Lysine
Term
What amino acid are beans low in that grains are high in?
Definition
Sulfur containing amino acids
Term
How many essential amino acids are there?
Definition
Eight or Nine depending on the source. This is because it is debated as to whether some are necessary to adults or just growing children.
Term
Name the 9 essential amino acids.
Definition
histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan and valine. (arginine is required by young children)
Term
How many non-essential amino acids are there?
Definition
12
Term
List the 12 non-essential amino acids
Definition
alanine, arginine, aspartic acid, cysteine and cystine, glutamic acid, glutamine, glycine, ornithine, proline, serine, taurine, tyrosine,
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