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 . Lab 4: Diffusion and Osmosis. PROBLEM . – What about physical pressure? . AIM: Describe the process of passive transport (diffusion across the membrane).. . It is easy to say that water will move from high concentration to low concentration…but look at the cell to the right…. 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.. 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 . 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. Unit 2. Cytology. Passive Transport. Movement of substances across a membrane without any input of energy. 3 Types:. Diffusion . Osmosis. Facilitated diffusion. Move with the concentration gradient. Concentration Gradient. 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 vs. . Endocytosis . and . Exocytosis. . Doctor Osmosis: Controller of all of the transporter proteins. Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of greater concentration of water to an area of lesser concentration of water. . 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 . and Osmosis. Diffusion . is the movement of particles from an area of high concentration to an area of low concentration. When a particle moves from an area of high concentration to an area of low concentration, it is said that it is moving down its . . 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. . . http://www2.nursingspectrum.com/articles/article.cfm?aid=11971. http://ailil.deviantart.com/art/Osmosis-Jones-Strikes-Back-3678440. Section 1 Vocabulary Pretest. Passive Transport. Diffusion. Concentration gradient. …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. Diffusion is a process of . mass transport. that involves the atomic . or molecular motion. .. In the simplest form, the diffusion can be defined as the . random walk. of an ensemble of particles from regions of high concentration to regions of lower concentration.