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Grad Bio
Lecture 1: Nutrition
50
Biology
Graduate
09/02/2012

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Term
anencephaly
Definition
a type of neural tube birth defect characterized by absence of covering over and incomplete development of the brain associated with folic acid deficiency during the first third of pregnancy
Term
ataxia
Definition
loss of motor coordination
Term
beriberi
Definition
a neurologic illness characterized by dementia and ataxia caused by deficiency of vitamin B-1 (thiamin)
Term
carbohydrates
Definition
Molecules composed of carbon, hydrogen, and oxygen atoms; these are the most significant source of energy in most diets ,
Term
complex carbohydrates
Definition
starches that are water-soluble polysaccharides of glucose such as those in grains and potatoes
Term
dental plaque
Definition
organic acids that erode dental enamel mixed with a slime on teeth and gums produced by bacteria that digest simple carbohydrates
Term
disaccharides
Definition
carbohydrates made of two basic units (monosaccharides); examples of disaccharides are sucrose and lactose
Term
essential amino acids
Definition
Nine of the twenty amino acids that are essential nutrients: lysine, methionine, threonine, tryptophan, leucine, isoleucine, valine, phenylalanine, and histidine
Term
essential fatty acids
Definition
two type of fatty acids, omega-6 (first double bond 6 carbons from methyl end) and omega-3 (first double bond 3 carbons from methyl end); examples include linoleic (omega-6) acid and linolenic acid (omega-3)
Term
essential nutrients
Definition
more than 40 different nutrients that must be obtained from the diet. Lack of a nutrient causes a specific deficiency disease. Essential nutrients are either 1) not made in the human body; 2) made in quantities too low meet our daily needs; or 3) synthesized from another essential nutrient. The six categories of essential nutrients include proteins, carbohydrates, fats, vitamins, minerals, and water.
Term
fat soluble vitamins
Definition
vitamins A, D, E, and K
Term
fats
Definition
triglycerides
Term
fatty acids
Definition
lipids composed of chains of 4-22 carbon atoms that may be saturated (completely bound with hydrogen atoms) or unsaturated (containing double bonds in the carbon chain, which leaves fewer places open for hydrogen binding)
Term
fiber or non-starch polysaccharide
Definition
polysaccharides that cannot be broken down by digestive enzymes , but serve other functions, like binding cholesterol & carcinogens, and reducing intestinal transit time. Some fibers are broken down in the large intestines yielding gas and some short chain fatty acids, which are passively absorbed.
Term
food
Definition
any substance containing energy or other nutrients which is orally consumed or otherwise taken into the body to sustain life, provide energy, or to promote growth.
Term
fructose
Definition
a monosaccharide found in fruits and honey
Term
galactose
Definition
a monosaccharide found in milk sugar
Term
glucose
Definition
a monosaccharide found in fruits and honey
Term
glycolipids
Definition
lipid substances with linked sugar groups that are key structural elements in cell membranes and precursors of other biologically active molecules important in cell signaling
Term
HDL-cholesterol
Definition
cholesterol carried on high-density lipoproteins that can absorb excess cholesterol in the blood and return it to the liver for recycling. Sometimes called "good cholesterol".
Term
homocysteine
Definition
a sulfur containing amino acid that, when present in elevated levels in blood has been associated with increased risk of coronary heart disease, stroke, and thrombosis even among individuals with normal cholesterol levels
Term
Kwashiorkor
Definition
a form of protein deficiency, most often seen in starving children, characterized by retarded growth and abdominal distention caused by liver enlargement
Term
lactose
Definition
a disaccharide made from glucose and galactose; milk sugar
Term
LDL-cholesterol
Definition
cholesterol carried on low-density lipoproteins that can penetrate arterial walls and, when oxidized, forms atherosclerotic plaque. Sometimes called "bad cholesterol".
Term
lipids
Definition
biologic compounds that are soluble only in organic solvents
Term
major or macrominerals
Definition
minerals required in amounts greater than 1-200 milligrams per day including calcium, magnesium, phosphorus, sodium, potassium, and sulfur
Term
marasmus
Definition
a severe form of both protein and energy deficiency often associated with body weight that is 60% less than normal
Term
minerals
Definition
inorganic elements found in both living and non-living things. All minerals are essential nutrients
Term
monosaccharides
Definition
the basic structural units of carbohydrates consisting of a six-carbon ring with six oxygen and twelve hydrogen atoms attached such as glucose, fructose, and galactose
Term
nutrition
Definition
the study and science of the dietary requirements of living things for proper health and development
Term
omega 3 fatty acids
Definition
polyunsaturated fatty acids contained in fish and some vegetable sources that appear to decrease triglyceride levels and the rate of progression of atherosclerosis, lower blood pressure, and reduce the risk of coronary heart disease
Term
osteoporosis
Definition
a condition characterized by decreased mineral bone mass and weakened bones causing a tendency to develop fractures following relatively minor injury that is often, but not always, caused by calcium deficiency
Term
pellegra
Definition
a disease characterized by skin irritation, diarrhea, and permanent dementia caused by deficiency of niacin or nicotinic acid
Term
pernicious anemia
Definition
a disease characterized by anemia and nerve damage caused by vitamin B-12 deficiency
Term
phospholipids
Definition
lipid substances with linked phosphate groups that are key structural elements in cell membranes and precursors of other biologically active molecules important in cell signaling
Term
polysaccharides
Definition
carbohydrates made of long chains of monosaccharide units
Term
proteins
Definition
polymers of amino acids that contain the elements carbon, hydrogen, oxygen, nitrogen, and sulfur
Term
rickets
Definition
a disease of children characterized by malformed bones caused by vitamin D deficiency
Term
satiety
Definition
the subjective sensation of fullness
Term
scurvy
Definition
a disease characterized by decreased wound healing and bleeding, especially of the mouth and gums, caused by vitamin C deficiency
Term
simple carbohydrates
Definition
mono- or disaccharides such as table sugar or candy that are not usually a component of the fibrous structure of foods and are readily digested. They rapidly reach the bloodstream as an available energy source
Term
spina bifida
Definition
a type of neural tube birth defect characterized by absence of covering over and incomplete development of the spinal cord associated with folic acid deficiency during the first third of pregnancy
Term
sterols
Definition
lipids that are composed of three six carbon rings and one five carbon ring fused together forming the basic structure for cholesterol, bile salts and many hormones such as cortisols, estrogens, androgens, and progesterones
Term
sucrose
Definition
a disaccharide made from glucose and fructose; table sugar
Term
superoxide dismutase
Definition
any of a group of antioxidant enzymes that consist of trace elements bound to protein that protect cells from damage caused by free radicals
Term
thrombosis
Definition
blockage of blood flow in veins or arteries caused by blood clots
Term
trace or microminerals
Definition
minerals required in daily quantities less than 20 milligrams per day including chromium, copper, iodine, iron, manganese, selenium, and zinc
Term
triglycerides
Definition
lipids composed of three fatty acids bound to glycerol, a three carbon polyalcohol
Term
vitamins
Definition
organic compounds essential for many metabolic functions. Most are essential nutrients and deficiencies may cause general and specific signs and symptoms of illness
Term
water soluble vitamins
Definition
B vitamins, folic acid, niacin, and vitamin C
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