PDF-Paper 12 Membrane Biophysics

Module 1 Components a nd Architecture o f Cell Membrane Learning objectives In this module prime focus is mainly on the plasma membrane however majority of the concepts discussed below are also. NO PAPER CODE E PAPER CODE F PAPER CODE G PAPER CODE H 10 NONE 11 12 13 14 15 16 NONE 17 18 19 20 21 22 23 24 25 26 27 28 NONE 29 30 NONE 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 4 007 pro clima SOLITEX Cover fleece Specialist film A stretchable diffusion permeable specialist 64257lm gives the pro clima SOLITEX membranes extremely high resistance to water At the same time vapourcan pass through it almost unrestricted The tight 2009 pro clima SOLITEX Cover fleece Specialist film A stretchable di57375usion permeable specialist 57374lm gives the pro clima SOLITEX membranes extremely high resistance to water At the same time vapour can pass through it almost unrestricted The t MEMBRANE. TECHNOLOGY. TRANSPORT MODELS. Membrane s. elective : . Ability . to control the rate of permeation of different species. Permeation mechanism model. Solution-diffusion model. Permeants. . dissolve in the membrane material and then diffuse through the membrane down a concentration gradient. and Transport. Cell Membrane. Cell membrane- also called the . Plasma Membrane. Separates the cell from its surrounding . environment.  . Helps maintain homeostasis which is keeping the internal conditions constant. by . Vani. Gupta. Types of cell membrane transport. Factors affecting transport. . Cell membrane. Chemical gradient. Electrical gradient. Rate of transport. . Passive transport. By. Dr. . Ayisha. . Qureshi. Assistant Professor, Physiology. MBBS, MPhil. OBJECTIVES. By the end of this lecture, you should be able to:. Define Nernst potential . Use the Nernst equation to calculate the values of Nernst potential for Na, K & Cl. Ch. 12, . Stryer. Short Course. Introduction to Membranes. Lipid structure makes a bilayer. Hydrophobic effect. Non-covalent structure. Fluidity of membrane: liquid crystal. Fluidity controlled by cholesterol, tail packing. Cell Membrane and Cell Wall:. . ALL. . cells have a . cell membrane. made of . proteins. and . lipids. . Cell Membrane. lipid bilayer. protein channel. protein . pump. Layer 1. Layer 2. SOME. cells have cell membranes . Homeostasis & Cellular Transport. Function of the Cell Membrane:. Cell membrane separates the components of a cell from . its . environment. —surrounds the cell. “Gatekeeper” of the cell—regulates the flow of materials into and out of cell—. Pratt & . Cornely. , Ch. 9. Thermodynamics. Membrane potential—volts. For +1 ion, potential = 0.058V(log. ). If potential is negative, the inside of cell is more negative.  . Energetics of Transport. dr. . boudani. Généralités . Membrane plasmique ou plasmalemme . Enveloppe mince continue. Epaisseur : 75Å. Délimitant le milieu intracellulaire du milieu extracellulaire. En . MO. elle est repérable comme frontière entre MIC et MEC. History of the Department. Heads of Deaprtment. 1938-1942. Professors N.Pavlov and K.Nurmagambetov.  . 1942-1944. MD. , . professor. . M.Rosenberg. 1944-1947. Academician of the Academy of Sciences of the Kazakh SSR. What is the plasma membrane?. A flexible boundary between the cell and its environment which maintains . HOMEOSTASIS. within the cell. **Remember that . HOMEOSTASIS. is a state of balance/equilibrium within the cell..