BIOL 1201 Chapter : Learning Objectives Test 2

• School: LSU
• Department: Biological Sciences
• Course: BIOL 1201
• Professor: All

Document Summary

Allows communication between the cell and the outside. Membranes and membrane function (chapter 7 of the textbook) Because they are amphipathic and have hydrophobic lipid tails (fatty acid chains) and hydrophilic phosphate heads in a bilayer. Not too rigid, filled with proteins and other molecules. Relative amounts of fats change depending on temperature. Important because proteins and molecules need to be able to move around the cell. Henrique and hanson performed experiments with pigs and examined the effects on the relative amounts of saturated and unsaturated fats. One can see similar patterns comparing species with different body temperature or cells grown at different culture temperatures. **lipid flipping is rare- means that something is wrong with the cell. What types of molecules can move easily across the membrane? (e. g. polar, nonpolar, large, small) Nonpolar molecules are able to dissolve in the lipoid bilayer.