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Nutrition
Ch 4-6
39
Biology
Undergraduate 2
10/24/2012

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Term
saccharide
Definition
sugar
Term
monosaccharide
Definition
Simple CHO single bond of sugar; Glucose, Fructose, Galactose
Term
disaccharide
Definition
Simple CHO double bond of sugar; glucose + glucose = maltose, glucose + fructose = sucrose, glucose + galactose = Lactose
Term
polysaccharide
Definition
Complex CHO (starches and fibers) many sugars; many monosaccharides linked together
Term
condensation
Definition
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a chemical reaction in which two reactants combine to yield a larger product an OH from one monosaccharide and H from another monosaccharide create a water molecule
Term
hydrolysis
Definition
a molecule of water splits a disaccharide to provide the H and OH needed to complete the resulting monosaccharides, occurs during digestion
Term
salivary amylase
Definition
hydrolysis of amylose (starch) to shorter polysaccharides and to the disaccharide maltose
Term
pancreatic amylase
Definition
a carbohydrate digesting enzyme, released into the intestine by the pancreatic duct, breaks down polysaccharides to shorter glucose chains and maltose
Term
gluconeogenesis
Definition
Converts Protein to glucose (a non carbohydrate source)
Term
ketosis
Definition
when the acid base balance has been disturbed by inadequate CHO intake the body begins to make glucose from amino acids (proteins)
Term
soluble fiber
Definition
indigestible food components that dissolve in water to form a gel; pectin is one example
Term
viscous fiber
Definition
forms a gel which easily digested by bacteria in the colon
Term
insoluble fiber
Definition
do not dissolve in water do not form gels
Term
hypoglycemia
Definition
low blood sugars
Term
hyperglycemia
Definition
high blood sugars, Type 1 & 2
Term
glycemic index
Definition
foods classified according to their potential for raising blood glucose levels
Term
acanthosis nigricans
Definition
indicator of insulin resistance; type 2
Term
lactose intolerance
Definition
inability to digest the milk sugar lactose; characterized by bloating, gas, abdominal discomfort and diarrhea
Term
HDL High Density lipoprotein
Definition
transports cholesterol back to the liver from the cells; composed mostly of protein. Good cholesterol
Term
LDL low density lipoprotein
Definition
derived from VLDLs as triglycerides are removed and broken down; composed primarily of cholesterol
Term
VLDL very low density lipoproteins
Definition
the type of lipoprotein made primarily by liver cells to transport lipids to various tissues in the body; composed primarily of TGs
Term
chylomicron
Definition
the class of lipoproteins that transport lipids from the intestinal cells to the rest of the body. Travel through lymph entering into the blood stream at the thoracic duct near the heart
Term
triglyceride
Definition
major fat from diet, major storage of fat in the body; composed of a glycerol molecule and three fatty acids can come from food or your body's fat storage
Term
sterols
Definition
a multi-ringed structure, waxy, don't dissolve in water, no glycerol backbone, most common sterol in foods is cholesterol, found only in animal products
Term
proteases
Definition
enzymes that hydrolyze proteins into tripeptides, dipeptides and amino acids. one example is pepsin a gastric enzyme.
Term
peptidases
Definition
enzyme secreted from membrane surfaces of the intestinal cells that hydrolyzes peptide bonds into single amino acids
Term
mRNA
Definition
make a copy of DNA (transcription) leave the nucleus and attach to a ribosome must arrange amino acids in the correct sequence (translation)
Term
tRNA
Definition
collects amino acids and transports them to mRNA
Term
nitrogen balance
Definition
amount of N consumed and dispursed
Term
RDA for protein
Definition
.8g/kg/day
Term
HbA1C
Definition
excess glucose that stick to blood, blood carries oxygen from lungs to cells of the body last 120 days
Term
Glycogen
Definition
Polysaccharide stored in animals as glucose (liver and muscles)
Term
Starches
Definition
Polysaccharide stored in plants as glucose
Term
Fibers
Definition
Polysaccharide in the stems and trunks of plants (various saccharides)
Term
pepsinogen
Definition
inactive enzyme activated by hydrocholric acid in the stomach
Term
pepsin
Definition
hydrolyzes protein and activated by hydrocholric acid
Term
glycogon
Definition
secreted by special cells in the pancreas in response to hypoglycemia
Term
Linoleic acid
Definition
omega-6 family from vegetable oils, poultry fat and seeds
Term
Liolenic acid
Definition
omega-3 Oils (canola and olive oil, flaxseed)EPA and DHA fish-human milk
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