PPT-Osmosis

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 . 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.. 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. WHAT happens in our body to our . cells. . when we drink too much . salt??. Diffusion. date. Diffusion. : when a solution spreads out everywhere.. This happens by itself because particles can naturally move around (vibration, rotation, translation of atoms). 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.). Sec 4.3 . pg. 74-75. Osmosis. : . a . special case of diffusion . involving water. water . molecules . move across . a selectively permeable membrane from an area of high water concentration to an area of low water . 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. Water . is one of the most important substances on earth. All plants and animals must have water to survive. If there was no water there would be no life on earth.. Apart from drinking it to survive, people have many other uses for water. These include. Good practice for test-taking 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. Solution. Solution. Cell Membrane consists of the lipid . bilayer. , carbohydrates, and proteins.. Water can pass right through lipid . bilayer. What is a solution?. A mixture of two or more substances.. 1. mystique- . (noun)a sense of mystery about someone or something. 2. . i. nfamous- . (adjective) well known for shameful or scandalous reasons. 3. reluctance- . (noun) hesitation about doing something. 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 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. …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.