BIOA01H3 Chapter 5: Chapter 5 Study Guide

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Mark Fitzpatrick

Document Summary

N fluid mosaic model - a lipid pool, in which proteins and carbohydrates float. N the lipids establish the physical integrity of the membrane and create an effective barrier to the rapid passage of hydrophilic materials. N the proteins have functions, namely: moving materials through the membrane and receiving chemical signals from the cell"s external environment. N carbohydrates are crucial for cell recognition of molecules. N main: phospholipid - has both hydrophilic and hydrophobic regions. N cholesterol is important for membrane integrity as it determines fluidity of the fatty acids in the membrane. N the fatty acids of the phospholipids make the hydrophobic interior of the membrane somewhat fluid. Lateral movement is always happening; but rarely is there any flipping of phosphoplipids. N the inner and outer halves of the bilayer may be quite different in the kinds of phospholipids they contain. N shorter-chain fatty acids, unsaturated fatty acids, and less cholesterol = more fluidity.