Diffusion & Osmosis

Click on each description and select the term that is best being described. Selectively Permeable Membrane Allows some materials to pass through but keeps other materials out Can be compared to a window screen Concentration Amount of substance in a given space Diffusion Movement of particles from an area of concentration to an area of lower concentratioin Process by which oxygen and carbon dioxide is moved into a cell Osmosis Diffusion of water molecules through a selectively permeable membrane Happens when water particles move from a place where their concentration to a place where their concentration is lower Click on the blank and choose the appropriate word from the drop down menu to fill it in. Diffusion is the movement of particles from higher concentration to lower concentration until they are evenly spread out. Which best describes which directions molecules move during diffusion? from an area of equilibrium to an area of high concentration from an area of equilibrium to an area of low concentration from an area of low concentration to an area of high concentration from an area of high concentration to an area of low concentration What is the process by which water diffuses across a selectively permeable membrane? active transport osmosis simple diffusion facilitated diffusion You decide to buy a new fish for your freshwater aquarium. When you introduce the fish into its new tank, the fish swells up and dies. You later learn that it was a fish from the ocean. what could have caused the fish to swell up and die? The water from the cells of the fish began to move out causing the cells to shrink. The salt moved into cells causing the fish to die. The freshwater from the aquarium moved into cells of the fish. The different concentrations of salt and freshwater caused the fish to be in an isotonic state. Click on the blank and choose the appropriate word from the drop down menu to fill it in. Osmosis is the passage water molecules from a lower concentrated solution to a higher concentrated solution through a semi-permeable membrane. Sort by clicking on each example and selecting the one of which it's an example. Example of Diffusion The student sitting next to you just came from gym class and forgot to shower and you can tell. The girl sitting two rows ahead of you put on too much perfume this morning. Yum! Something smells good. The neighbors are cooking on the grill. Oxygen molecules move from the air sacs in the lungs across the cell membranes. Example of Osmosis After sitting in the bathtub for hours, your fingers start to look like prunes. One way to get rid of slugs in your garden is to sprinkle salt on them, so they shrivel up. Gargling with salt water when you have a sore throat causes your swollen throat cells to shrink and feel better.