NUTR 310 Final: COMPLETED Test 4 (final) Review part 1.docx
Document Summary
Lipids / biomembranes / fatty acid oxidation, synthesis/ cholesterol. Review part 1 section 4: lipids: chapter 8. Lipids are poorly soluble in water hence well suited to serve as the major component of cell membranes, and few select serve as cofactors and intracellular messengers: fatty acids are hydrocarbon chains generally 4-36 carbons long (12-24 common). 12:1 3 would mean that the carbon chain is 12 carbons long with one unsaturation at the third carbon. (table 8. 1 and 8. 2). In life, an unsaturation is normally a cis bond. Physical properties with heat, bilayer membranes become more disordered. When an organism uses fatty acids, the ester linkages of triacylglycerols are hydrolyzed by enzymes called lipases. When this hydrolysis reaction takes place outside an organism using a base catalyst, the reaction is called saponification. Glycerol and potassium or sodium salt is made. Omega 3 has unsaturations at 6 and 9, but omega 6 has unsaturations at 3,6, and 9.
