ANP 1105 Lecture Notes - Lecture 3: Lipid Bilayer, Extracellular Fluid, Outsideinside

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: Frank Feiner

Document Summary

-> can skip over nerve and muscle chapters. Have phospholipid head and fatty acid tail; bilipid bilayer. Not a rigid wall; fluid --> called fluid mosaic because proteins can move sideways or from one side to another. In between the bilayer are the tails that form a hydrophobic environment; not much happens there --> all happens via. 2 types of lipids in the wall; hydrophilic end on outside/inside, hydrophobic tails line up inside membrane; not much actually happening inside membrane. 1) integral: embedded within the lipid bilayer. Roles include: channels, carriers, enzymes, or can act as receptors for chemical messengers (hormones, drugs, etc. ) 2) peripheral: loosely attached to the membrane. Roles include: support membrane link cells, change cell shape during cell division, and muscle contraction. Transport, receptors for signal transduction, attach to cytoskeleton, and extracellular matrix, enzymatic activity, intercellular joining, cell to cell recognition. Sugars can be bound to lipids or proteins.