（脂肪酸分解代謝ZhangSchoolofLifeSciences&: :1Mobilizationoffats（TG）fromdietaryintakeandadiposetissuesfattyacidsKetone FAmetabolismregulationand23expendingabout25,000kJ/day3Lipids：insolubilityorlowersolubilityinHighlysolubleinnon-polarTheirwater-insolubilitycontributestomuchofthecomplexitytheirdigestion,transport,and* *polar,moreamphipathiclipidslipidCategories（ChemicalSimplelipid（單純脂質(zhì)--glyceride(甘油酯)wax（蠟--phosphatidate（磷脂）glycolipid（糖脂Derivedlipid(衍生脂質(zhì)sterol（固醇類）terpene（萜5Simplelipid（單純脂質(zhì)Biological--highmelting--energy--water-impermeable(不透水)棕櫚 三十烷Triacontanyl-palmitateisthemajorcomponentofbeeswax. Simplelipid（單純脂質(zhì)Naturaloilsmainlycontaintriacyl-glycerolswithunsaturatedfattyacids--liquidsatroomSolidfatscontainprimarilysaturatedfatty7--highmelting7--solidatroomCellMetab.2015Oct6;22(4):658-IntroductiontofattyacidsFattyacidsplayimportantBuildingblocksforphospholipids(磷脂&proteinstoHighenergysourceofHormonesor9TwosourcesofFA:storedanddietaryFAsrepresenttheprincipalformofstoredenergyin(triacylglycerolstriglycerides甘油三酯brownandwhiteThecarboninfattyacids(-CH2)iscomple yreduced-moreenergyFattyacidsarenothydrated,socanpackmorecloselyinstoragetissuesfattyacidSaturatedFA;unsaturatedFA;polyunsaturatedpalmitic（16：0）、Palmitoleic（棕櫚油酸)（16：1△9）、oleic（18：1△9Linoleic(亞油酸）（18：2△9，12）、α-linolenic（α-亞麻酸）（18：3△9，12，15）、γ-liolenic（γ-亞麻酸）（18：，14）EPA(20碳五烯酸）(20：5△5，8，11，14，17）DHA（22碳六烯酸）SaturatedVs.UnsaturatedPolarheadSaturatedFatty

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