RVHS 2. Cellular Transport

River Valley High School 1 2025 JC1 H2 Biology Lecture Topic 2: Cellular Transport River Valley High School 2025 JC1 H2 Biology Lecture Topic 2: Cellular Transport Name: ( ) Class: 25J__ Date: References Title Authors Biology (9th edition) Campbell and Reece Biological Science 1: Organisms, Energy and Environment Taylor, Green and Stout AS Level Biology Bradfield, Dodds and Taylor Molecular Biology of the Cell (5th edition) Alberts, Johnson, Lewis, Raff, Roberts and Walter H2 Biology Syllabus 9477 (2025) Candidates should be able to use the knowledge gained in the following section(s) in new situations or to solve related problems. Related Topics Concepts Biomolecules of Life and Cellular Transport Structures and roles of carbohydrates, lipids and proteins in living organisms Organelles and Cellular Structure Functions of membrane system and organelles Communication and Equilibrium in Organisms Roles of receptors on cell surface membrane Learning Outcomes 1B. Biomolecules of Life and Cellular Transport j. Explain the fluid mosaic model and the roles of the constituent biomolecules (including phospholipids, proteins, glycolipids, glycoproteins and cholesterol) in cell membranes. k. Outline the functions of membranes at the surface of cells and membranes within the cell. l. Explain how and why different substances move across membranes through simple diffusion, osmosis, facilitated diffusion, active transport, endocytosis and exocytosis.

River Valley High School 2 2025 JC1 H2 Biology Lecture Topic 2: Cellular Transport Lecture Outline I. Membrane Structure A. Fluid Mosaic Model of Membrane Structure B. Components of Biological Membranes II. Membrane Function III. Transport Across Membranes A. Passive processes 1. Simple Diffusion 2. Facilitated Diffusion 3. Osmosis B. Active processes 1. Active Transport 2. Bulk Transport (Endocytosis, Exocytosis) Websites URL Description https://www.youtube.com/watch?v=nsklF1w4eok This TED-Ed video provides an overview of the structure and function of the membrane and its components. http://moleculesinmotion.com/jmol/boyer_completed/ani mations/membrane_transport/membrane_transport.htm *Note: you would need to use a laptop/desktop and download a chrome extension (e.g. “Flash Player for Chrome”) to view the tutorial. An interactive tutorial on the different mechanisms by which transport across membranes occurs. The tutorial contains animations for better visualisation, as well as quizzes to reinforce concepts.

River Valley High School 3 2025 JC1 H2 Biology Lecture Topic 2: Cellular Transport I. Membrane Structure A. Fluid Mosaic Model of Membrane Structure Since 1917, various membrane models have been proposed; and the currently accepted model, though continually being refined, is the fluid mosaic model. This model was proposed by S.J. Singer and G. J. Nicholson in 1972,