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18 Cards in this Set
- Front
- Back
Chemical composition of the plasma membrane and relate it to membrane functions.
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defines the extent of a cell, thereby separating two of the body's major fluid compartments- the intracellular fluid within cells and the extracellular fluid outside cells.
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lipid bilayer?
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lipid bilayer- forms the basic "fabric" of the membrane, is constructed largely of phospholipids, with small amounts of cholesterol.
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what is it about phospholipids that makes them effective molecules for membrane structure.
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each has a polar "head" that is charged and hydrophilic, and an uncharged, nonpolar "tail" made of 2 fatty acid chains and hydrophobic. encourages biological membranes to self-assemble into closed, generally spherical, structures and to real themselves quickly when torn
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major atoms in carbs
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hydogren to oxygen 2:1
CH2O - general formula C 6 H 12 O 6 - glucose |
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major atoms in lipids
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carbon, hydrogen, and oxygen
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major atoms in proteins
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carbon, hydrogen, oxygen, and nitrogen
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major atoms in nucleic acids
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carbon, hydrogen, oxygen, nitrogen, and phophorus
atoms make up nucleotides |
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subclassification of carbs
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1. simple- monosaccharide: glucose, fructose, galactose
disaccharide: sucrose= glucose = fructose (table sugar 2. complex- more thn 2 molecules of CHO- Polysaccharides: branched chain, starch (plants and animals, glycogen) and cellulose (fiber) |
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subclassifications of lipids
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1. simple
- saturated: single bonds between carbon atoms. animal products, egg yolk, dairy 2. compound -used for making anatomical structures, phosphoolipids 3.derived- (these are our hormones) used in regulation of bodily functions - steriods - prostaglandins |
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sublassifications of proteins
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1. Primary- unique amino acid sequence (ever protein has one)
2. Secondary- fibrous proteins (rope-like), used for building anatomical/structural components (collagen, keratin, elastin, actin, myosin) 3. Tertiary- globular proteins (have an active site), used for controlling the physiology/function (enzymes, antibodies, albmin) 4. Quaternary- bonding between globular or fibrous proteins (hemoglobin, 4 amino acid chains) |
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subclassifications of nucleic acids
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DNA and RNA
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function of carbohydrates
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1. ENERGY SOURCE
2. protein sparing 3. Metabolic Primer 4. Ruel for the Central Nervous System 5. Minor Role in Cell Structure |
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function of lipids
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1. Energy source- fat is ideal energy source bc eachmolecule carries large quantitieisfor energy per unit weight and easily converted to energy
2. spare proteins 3. protection 4. insulation for body/organs 5. vitamin carriers 6. hunger depressant 7. major role in cell structure |
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functions of proteins
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1. cell structure and function
2. regulate body functions 3. energy source |
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function of nucleic acids
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criticala in the genetic regulation of the species or organism
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function of vitamins
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act as co-enzymes in metabloic reactions
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function of minerals
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make bones strong
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define nitrogen and indicate possible causees of positive and negative nitrogen balance
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homeostatic state is relected in the body's NITROGEN BALANCE.
positive- amount of protein being incorporated into tissue is greater than the amount being broken down and used for energy, ex. growing children, pregnant women, illness negative- protein breakdown for energy exceeds the amount of protein being incorporated into tissues, ex. physical and emotional stress |