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21 Cards in this Set
- Front
- Back
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physiological functions of lipids
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constituents of membranes
bioregulation cofactors for enzymes structure food and digestion |
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seven classes of lipids
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fatty acids
fats (triglycerides) waxes phospholipids sphingolipids prostaglandins steroids |
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functions of fatty acids
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- storage
- precursors to metabolic intermediates - membrane anchors |
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structure of fatty acids
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long chain (n-alkyl) organic acids, which can be saturated or unsaturated
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pharmaceutically, fatty acids are used in ____.
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ointments
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What is the trend in melting point of saturated fatty acids, with increasing number of carbons? Why?
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With increasing number of carbons, the melting point increases. Larger molecules have more van der Waal's interactions, and thus they adhere more tightly in a solid structure.
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Saturated fatty acids have [higher / lower] melting points than their unsaturated counterparts. Why?
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higher... The kinks in unsaturated fatty acids render them less capable of packing into solid structure; thus, they have lower melting points.
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carbon skeleton of Palmitoleic acid
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16:1(Δ9)
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carbon skeleton of Oleic acid
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18:1(Δ9)
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carbon skeleton of Linoleic acid
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18:2(Δ9,12)
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carbon skeleton of α-Linolenic acid
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18:3(Δ9,12,15)
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carbon skeleton of Arachidonic acid
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20:4(Δ5,8,11,14)
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Fill in the table.
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- Lauric acid
- Myristic acid - Palmitic acid - Stearic acid - Arachidic acid |
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Fill in the table.
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n-Dodecanoic acid
n-Tetradecanoic acid n-Hexadecanoic acid n-Octadecanoic acid n-Eicosanoic acid |
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What are the carbon skeletons of the essential fatty acids?
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18:2
18:3 20:4 |
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What are the common names of the essential fatty acids?
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Linoleic acid
α-Linolenic acid Arachidonic acid |
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Fatty acids form ____ in water.
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micelles
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Fatty acids are ____ ("loving either") and act as ____.
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amphiphilic; detergents
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Detergents are used for ___ and ___.
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cleaning
emulsifying fats |
