PPT-Osmosis Problem Practice

SB1d 1 Cell   Environment hypotonic hypertonic Water leaves the cell and it shrivels or shrinks 2 Cell   Environment . 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 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 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 . 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 . 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. . . 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.). 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. . 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. . . Salt water is desalinated to produce fresh water suitable for human consumption or irrigation. .. There are about 1.5 . x . L of sea water in ocean of which 3.5 percent (by mass) is dissolved material.. 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. …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.