PPT-Transport across cell membrane

by Vani Gupta Types of cell membrane transport Factors affecting transport Cell membrane Chemical gradient Electrical gradient Rate of transport Passive transport. Learning Outcomes. explain what is meant by . passive transport . (diffusion and facilitated diffusion including the role of membrane proteins), . active transport. , . endocytosis . and . exocytosis;. 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 . -. 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. . By Dr. . Vani. Gupta. 2. “Polarity” . of the . membrane. Na. +. K. +. Mg. 2+. Ca. 2+. H. +. HCO. 3. -. Cl. -. SO. 4. 2-. PO. 3. -. protein. inside. (in mM). 14. 140. 0.5. 10. -4. (pH 7.2). 10. 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). 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. Learning . Goal . Describe . the composition and function of the lipid bilayer in cell membranes.. Cell Membranes. Cell membranes. . are semipermeable so that nutrients can enter the cell and waste products can leave.. HONORS BIOLOGY. 1. What . cell organelles/structures. are involved with protein production, packaging, transporting, and excretion from the cell?. Nucleus → rough endoplasmic reticulum . → Golgi apparatus → vesicle → cell membrane. (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). Where does the name “cell” come from?. “Cells” were named by Englishman Robert Hooke in 1665.. He observed that cork wood looked like monk’s cells in a monastery.. The Cell Theory. The cell is the basic unit of structure and function.. Ms. A. . Fasila. Begum. Assistant Professor. Department of Microbiology. Jamal Mohamed College. Trichy. Introduction. All microbes have a need for three things: carbon, energy, and . electrons.. Nutrients are substances in the environment used by organisms for catabolism and anabolism..