PPT-SIMPLE DIFFUSION AND OSMOSIS

SIMPLE DIFFUSION WHAT IS DIFFUSION Diffusion is the movement of molecules or particles from a region of high concentration to a region of low concentration . 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;. 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 . 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 . active transport. in . cells . Movement of molecules into and out of cells. T. ransport can be passive or active.. P. assive requires no energy and moves down a concentration gradient from high to low concentration. . Really smelly demonstration…... Put a few drops of vanilla in a balloon. Shake the balloon, then wait about 30 seconds. Smell the outside of the balloon. What’s going on?. EVIDENCE. INFERENCE. 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.). 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 . 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. . 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.