NU FS305 Lecture Notes - Lecture 5: Margarine, Swordfish, Olive Oil
31 Oct 2016
School
Department
Course
Professor
Document Summary
Phospholipids: glycerol + 2 fatty acids + phosphate group. Energy source and storage form of energy (triglycerides) Common fatty acids have even number of carbons. Unsaturated: contain double bonds ie. less h atoms. What we eat takes 2-4 weeks to reflect in our cell membranes. Double bond label: number of carbons from the methyl end (w or n) The structure changes when a double bond is added. Example: c18 stearic acid (common fatty acid in our diet) Esse(cid:374)tial fatty a(cid:272)ids that our (cid:271)odies (cid:272)a(cid:374)"t sy(cid:374)thesize, (cid:449)e just do(cid:374)"t ha(cid:448)e the e(cid:374)zy(cid:373)es. In foods: off / rancid favours and/or odours. In the body: dna, cellular damage, macromolecular damage (lipids, proteins, sugar moieties) We have a lot of defence mechanisms that protect ourselves, but cannot protect ourselves. Lipid and free radical damage can happen to proteins (dna), carbohydrates, fat -> leads to cell injury and malfunction (malfunction of cell processes that might be happening)
