PPT-La membrane plasmique

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. 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 بسم الله الرحمن الرحيم. Objectives. Define Membrane . Potential. ?. Describe the electrical potential across the cell membrane.. Explain the Resting . Membrane and its cause . (Concentration . -. Gateway to the Cell. 2. Photograph of a Cell Membrane. 3. Cell Membrane. The cell membrane is . flexible. and allows a . unicellular. organism to . move. 4. Homeostasis. Balanced. internal condition of cells. MEMBRANE. SEPARATION. INTRODUCTION [1]. In order to apply membranes on a technical scale, large membrane areas are normally required. The smallest unit into which the membrane area is packed is called a . 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. Summary. How do materials get across a cell's membrane. ?. It depends on the type of substance. Summary. Non-polar materials or hydrophobic materials . do. cross easily, especially if small. Ex – CO. by . Vani. Gupta. Types of cell membrane transport. Factors affecting transport. . Cell membrane. Chemical gradient. Electrical gradient. Rate of transport. . Passive transport. Group 2- Cell Development. Gladys Alexandre, Cristina Calestani, John Koontz, Silvia Moreno, Brian Ring, William Said. Context: Principles of Biology I (BIOL 1107); >250 students (freshman level). 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. RAW . TANNERY WASTEWATER FOR BIOGAS PRODUCTION. . R. UMAIYAKUNJARAM, M. Tech (IIT.M. )., . Environmental Engineer, TNPCB, . Guindy. , Chennai, . Ph.D. Scholar, Centre for Environmental Studies,. Civil . 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—. 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. Cell Membrane. .. The cell membrane . Controls. what comes out and . in of the cell. . It also provides protection.. The composition is a double layered sheet called a . Bi-lipid layer. .. This lipid bi-layer is made up of two .