NTR 108 Lecture Notes - Lecture 3: Essential Fatty Acid, Canola, Hypercholesterolemia
12 Apr 2016
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General: lipids include a structurally and funcionally diverse group of substances that are soluble inn organic solvents (v: a d e k) Sterols : classes, cholesterol : from animal products. Synthesized by the liver and intesine: phytosterols : from plants and some animals. Structure: muliple ring structure, clear, waxy substance. Lipophilic : lipid friendly & soluble in lipids c. Funcions of cholesterol: structural (no energy, component of cell membrane---neural cells, regulaion: *precursor for hormone synthesis. *precursor for bile acid synthesis by the liver. --cholesterol under skin exposed to sunlight: triglycerides (fats and oils) main; eat/contain in body. Their physical and metabolic properies are dependent upon consituent faty acids a. 3 faty acids (ester bond to glycerol) c. --triglycerides make almost all of the lipid consumed. --triglycerides are the largest energy store in body: 9 kcal/gram. --stored: *mainly in adipose issue (fat cells) & *muscles. Stored triglycerides are broken down to faty acids.
