Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
CELL TRANSPORT AND DIFFUSION<br />Thurs. Sept. 16, 2010<br />
What is diffusion?<br />When molecules move from an area where there are many of them, to an area where there are fewer of...
Diffusion continued…<br />When the molecules are equally or evenly spread out, this is called EQUILIBRIUM<br />EQUAL amoun...
Diffusion into a cell<br />Diffusion into a cell has to cross the ____cell membrane___________________<br />Cell membranes...
Upcoming SlideShare
Loading in …5
×

Cell transport and diffusion

1,335 views

Published on

  • Be the first to comment

  • Be the first to like this

Cell transport and diffusion

  1. 1. CELL TRANSPORT AND DIFFUSION<br />Thurs. Sept. 16, 2010<br />
  2. 2. What is diffusion?<br />When molecules move from an area where there are many of them, to an area where there are fewer of them<br />E.g. molecules of food coloring spreading out in the beakers<br />This happens in liquids and gases<br />E.g. spraying perfume <br />It is a form of passive transport<br />Does not need to use cell energy to enter the cell<br />
  3. 3. Diffusion continued…<br />When the molecules are equally or evenly spread out, this is called EQUILIBRIUM<br />EQUAL amounts = Equilibrium<br />The molecules move until they reach equilibrium, and they keep moving to maintain equilibrium<br />
  4. 4. Diffusion into a cell<br />Diffusion into a cell has to cross the ____cell membrane___________________<br />Cell membranes are selectively permeable<br />SELECTS (chooses) what to let in<br />Water is necessary for all life and all of your cells, so how does it enter across the cell membrane? <br />OSMOSIS!<br />It is the diffusion of water across a cell membrane<br />

×