PPT-Membrane Transport

Pratt amp Cornely Ch 9 Thermodynamics Membrane potentialvolts For 1 ion potential 0058Vlog If potential is negative the inside of cell is more negative   Energetics of Transport. 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. 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). Movement of materials through a membrane . against a . concentration. gradient. and . requires . energy. from the cell. (. ATP. ). Low. Concentration .  . High. Concentration. Carrier proteins. (Guyton, 12. th. Ed. (chapter 4): . pg. 45-56) . Dr. . Ayisha. . Qureshi. Assistant Professor, Physiology. ACTIVE TRANSPORT. Definition: . Active . transport is a . carrier-mediated transport wherein . 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 . 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—. TECHNOLOGY. PRESSURE DRIVEN MEMBRANE PROCESS. Various pressure-driven membrane process can be used to : . 1. Concentrate . 2. Purify a dilute (aqueous or non aqueous). THE PARTICLE OR MOLECULAR SIZE AND CHEMICAL PROPERTIES . 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—. 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.. Lec3/cytology . 2021-2022. By: . MSc. . Farah E. . Ismaeel. Objectives of this lecture. Learn about . . cell . membrane . permeability. . . Learn . about . the ways of molecules transport via cell membrane. . During . various steps in glycolysis and the citric acid cycle, the oxidation of certain intermediate precursor molecules causes the reduction of NAD. +. to NADH + H. +. and FAD to FADH. 2. . . NADH .