BSC 2010C Lecture Notes - Lecture 6: Lipid Bilayer, Cell Junction, Membrane Structure

• School: UCF
• Department: Biology
• Course: BSC 2010C
• Professor: Pamela Thomas

Document Summary

Test 2 is next week on chapters 6-9. Cell membranes made of phospholipids: head is polar (charged, tails are non-polar (not charged, the charged parts of the phospholipid like to be associated with water in the cells. Membrane structure: membrane is fluid mosaic model made of lipids and proteins, proteins embedded in phospholipid bilayer, cholesterol helps stabilize cells at different temperature extremes, lipids move in membrane (semi-fluid nature of membrane) Two major classes of proteins in membrane: integral: transmembrane (do not go all the way through the membrane, peripheral: loosely associated with membrane surface, amphipathic: substance has polar (charged) and non-polar regions; it"s hydrophobic and hydrophilic. An integral protein can be a transporter: true. Membrane function: proteins make membrane a mosaic of function. Receptors: trigger cell activity when molecular messenger binds. Gap junctions: provide channels between cells; allow rapid transport of materials.