osmosis and diffusion
TRANSCRIPT
Introductory Concepts in Biology
Diffusion and Osmosis
Diffusion
Movement of molecules from high to low concentration moves with the concentration gradient
No energy required
Examples: oxygen and carbon dioxide
Diffusion
Diffusion
Diffusion can occur to move molecules in and out of a cell through the cell membrane.
Diffusion can also occur within a cell (or fluid) to disperse molecules evenly throughout.
Diffusion requires no additional energy and is powered by the natural motion of the molecules.When would equilibrium be reached more quickly?
https://www.youtube.com/watch?v=9ghYur0vqgE
Osmosis
Special form of diffusion.
Water moves from high to low concentration across a semipermeable membrane.
Solute sucks water towards it.
Movement is from area of high (water) concentration to low (water) concentration.
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