PPT-2.4.4: Define diffusion and osmosis

Diffusion The passive movement of particles from a region of high concentration to a region of low concentration until equilibrium is reached Molecules still move after equilibrium is reached . Learning Outcomes. explain what is meant by . passive transport . (diffusion and facilitated diffusion including the role of membrane proteins), . active transport. , . endocytosis . and . exocytosis;. Cell membrane compared to a sieve/colander.. When would you use a colander?. What does a cell membrane and a colander have in common?. All cells are surrounded by a cell membrane. Cell membranes . keep things out and keep things in.. Essential idea: Membranes control the composition of cells by active and passive transport.. The . background image is . a piece of artwork inspired by the complexity of an . E. Coli. . Complexity in cell structure is much . 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.. & . Osmosis. Why are diffusion and osmosis important?. Diffusion and osmosis are important because they provide . evidence. for the existence and movement of particles, that is, they provide . evidence. Parkland 2012-2013. Unicellular VS Multi-cellular . Multi-cellular organisms can: . live . in a wide variety of . environments. grow . very . large . . obtain their energy from a wide variety of foods . The Cell in its Environment. Ch 7, Section 2. L3 Biology. Molecules are always moving. Molecules move randomly and bump into each other and other barriers. Diffusion. Movement of molecules from an area of high concentration to an area of lower concentration . Facilitated Diffusion, Osmosis and Active Transport. Learning Objectives. To recap the process of diffusion.. To understand the concepts of facilitated diffusion, active transport and osmosis.. To understand what is meant by water potential (. Mr. Black . Warm Up February 10, 2016. What is an organelle?. During a chemical reaction….. Reactants increase while the products decrease. . Reactants decrease while the products increase. . Products always equal the reactants . Essential idea: Membranes control the composition of cells by active and passive transport.. The . background image is . a piece of artwork inspired by the complexity of an . E. Coli. . Complexity in cell structure is much . 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. . 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.. …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.