Transportation and Tonicity

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Presentation transcript:

Transportation and Tonicity -there are 3 kinds of transportation - simple diffusion and carrier-facilitated diffusion don’t need energy (passive) - active transport requires energy to reverse diffusion (active)

Transportation and Tonicity -When water diffuses, it always moves down the concentration gradient – that is, it moves from an area of high concentration to an area of low concentration. -Active transportation uses ATP for energy to move things in the opposite direction, or against the concentration gradient

Transportation and Tonicity -There are three types of environments cells can find themselves in with regards to osmosis: -hypertonic: more solute and less water -hypotonic: less solute and more water -isotonic: equal balance of water and solute on inside and outside of cell -often, tonicity refers to the environment outside the cell

Transportation and Tonicity -organisms typically thrive best when they are in isotonic environments

Diffusion and Osmosis Comics Write a three panel cartoon for both diffusion and osmosis. You can do it in any way that you want, but make sure you include explanations of what is happening in each panel. Diffusion: Osmosis: