PPT-Osmosis Practice Problems

Good practice for testtaking strategy too By the end of this lesson You should be able to solve word problems that require analysis of osmosis scenarios 1 If you soak your hands in dishwater you may notice that your skin absorbs water and swells into wrinkles. Reverse osmosis is particularly important. This unit operation enables high purity water to be produced. It is widely used for many different processes in industry and for desalination of sea wat Prefixes, Suffixes, and Vocabulary. Diffusion . = the movement of particles from a high concentration to a low concentration. . Osmosis . = The diffusion of water. . . Hyper . = high, over. . . Hypo. Intermediate 2 Biology. Unit 1: Living Cells. Diffusion. Learning Objectives. Name the method by which substances move in and out of cells.. Define the term . ‘. diffusion. ’. State when diffusion will stop.. The phenomenon of osmosis occurs when pure water flows from a dilute saline solution through a membrane into a higher concentrated saline solution. Figure 1.4 Overview of osmosis As a fundamental Overview. The plasma membrane is the boundary that separates the living cell from its . surroundings. It controls what goes in and what goes out. Regulates molecular traffic. The plasma membrane . is a . CHAPTER 2/ O’LEVEL BIOLOGY 5090 / GCE.. 2. Diffusion and osmosis. Content. 2.1 Diffusion. 2.2 Osmosis. 2.3 Active . transport. Learning outcomes. Candidates should be able to:. (a) define diffusion as the movement of molecules from a region of their higher concentration to a region of. Osmosis. When the diffusing substance is water, and when the diffusion takes place through a semi permeable membrane the process is called osmosis.. Also the movement of water down a concentration gradient from an area of high solvent concentration (weak solution) to an area of low solvent concentration (stronger solution.). Diffusion. Movement of particles from HIGH to LOW concentration.. Caused by a . concentration gradient . (difference in concentration).. Stops when it reaches . dynamic equilibrium. (equal amounts everywhere). . Leaving Certificate Biology. Higher Level. Selective Permeability. Cell membranes are selectively permeable meaning they can control what enters and leaves the cell. Selective permeability is controlled by proteins embedded in the cell membrane. Molecules are always moving. Molecules move randomly and bump into each other and other barriers. Concentration gradient. Concentration Gradient - change in the concentration of a substance from one area to another.. Root Hair Cells . Roots do more than just anchor the plant in the ground, . they take up water and mineral salts . from the soil. . The surface of the cells have specialised root hair cells with long thin extensions that reach into the surrounding soil. . REVIEW of Passive Transport. Osmosis. is the movement of . water. into and out of the cell membrane. It is a SPECIAL KIND of Diffusion.. Water will move from an area of HIGH water concentration to an area of LOW water concentration on its own with NO ENERGY!. Page 1of 3Schedule of Accreditationissued byUnited Kingdom Accreditation Service21 -47 High Street Feltham Middlesex TW13 4UN UK4236Accredited to ISO/IEC 17025200520 30 Labs LtdIssue No008 Issue dat …happens across a semi-permeable membrane. . ONLY WATER. Water is a small but extremely important molecule that makes up most of the liquid part of the cytoplasm in living things. . . Deals . ONLY.