PPT-7.3 Cell Transport 2006-2007

Function of the Cell Membrane Cell membrane separates the components of a cell from its environment surrounds the cell R egulates the flow of materials into and out of cell selectively permeable. Chapter 2.2. McGraw-Hill Ryerson. Biology 12. (2011). Concentration gradient. Concentration gradient. : difference in concentration between one side of a membrane and the other. Ions and molecules like to move from . 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. Active Transport. . النقل النشط. 2. Some facilitated transport proteins can move solutes against their concentration gradient, from the side where they are . less concentrated. to the side where they are . The Nucleus: the gene-containing control center of the cell.. The nucleus is bound by a double membrane called the . nuclear envelope. . . Inside the nucleus are one or more small, dark-staining, essentially round structures called . Save your more money on international shipping by getting in contact with Florida Transporter. Samir. Sarkar. 1. Operations Services Branch. Australian Radiation Protection and Nuclear Safety Agency. PO Box 655, Miranda, NSW 1490, Australia. 2 . Fax: 61-2-9541 8348; Email: . Samir.Sarkar@arpansa.gov.au. 17-21 October 2011, Vienna, Austria . Session 1A: Where Are We Today?. Modal Structure: Rail, Road, Sea and Air. Khammar MRABIT . Director, Office of Nuclear Security. Department of Nuclear Safety and Security. (Chapter . 3) . Objectives:. 1- Define a cell and distinguish between cytosol and cytoplasm. . 2- Explain the structure and molecular organization of the cell membrane and list factors determining its selective permeability. . Warm-Up. What do you know so far about the cell membrane?. What do you want to know about the cell membrane?. Cell Membrane Structure & Function. Phospholipid. Bi-layer . (hydrophilic heads, hydrophobic tails). Active Transport Driven by ATP Hydrolysis. The net flow of molecules by facilitated diffusion, through either carrier proteins or channel proteins, is always energetically downhill in the direction determined by electrochemical gradients across the membrane. . 3 week old larval anchovy. How big can you be and still meet O. 2. demand of tissue simply by diffusion?. The larval anchovy (average body radius = 0.6 mm) can meet all of its metabolic demand by uptake of O.