BIOL-4610 Study Guide - Comprehensive Final Exam Guide - Protein, Golgi Apparatus, Cell Membrane

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Document Summary

Function of cell membranes and the lipid bilayer. Lipid bilayer: head of the phospholipid bilayer is hydrophilic and tail is hydrophobic. Membrane = define boundary of cell and organelles. Inside of cell must be physically separated from surrounding environment. Intracellular membrane = compartmentalize functions within eukaryotic cells. Membrane protein: control what comes in and out of cell. Gases, water, ions, nutrients and other substances = taken up into compartments. Receive info in form of electrical or chemical signals. Signal transduction: used to describe mechanism used to transmit signals from outer surface of cell to cell interior. Many chem signals bind to specific membrane proteins (receptors) Allow cells to contact, adhere and communicate with other cells. Tight junctions: seals/block passage of fluids into cell. Overton and langmuir: lipids are important component of membrane. Gorter and grendel: basis of membrane structure is lipid bilayer. Fluid mosaic model: membrane has two fluid layers of phospholipids + proteins inside and on the layers.

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