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  1. Khan Academy | Khan Academy

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  2. Diffusion (video) | Culture | Khan Academy

    Some ways that diffusion can occur would be through exploration, military conquest, missionary work, mass media, tourism, and even through the internet. So here are a few examples that will help us …

  3. Simple diffusion and passive transport (article) | Khan Academy

    In cells, some molecules can move down their concentration gradients by crossing the lipid portion of the membrane directly, while others must pass through membrane proteins in a process called facilitated …

  4. Khan Academy

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  5. Cell structure and function | AP®︎/College Biology - Khan Academy

    Explore how facilitated diffusion moves molecules across membranes without energy input. Understand diffusion, passive transport, and the role of electrochemical gradients.

  6. Passive Transport by Facilitated Diffusion - Khan Academy

    Understand how facilitated diffusion employs chloride channels to transport ions from the cell's exterior to its interior, all without expending any energy. Created by Raja Narayan.

  7. Diffusion and osmosis (video) | Khan Academy

    Diffusion refers to the movement of molecules from an area of high concentration to an area of lower concentration. Osmosis is a type of diffusion specifically for water molecules moving across a semi …

  8. ଖାନ୍ ଏକାଡେମୀ | ଖାନ୍ ଏକାଡେମୀ

    ଓଃ। କିଛି ଭୁଲ ହୋଇଛି। ଦୟାକରି ଆଉଥରେ ଚେଷ୍ଟା କରନ୍ତୁ। Uh oh, it looks like we ran into an ...

  9. Uniporters, symporters and antiporters (video) | Khan Academy

    Passive transport is the movement of substances across a cell membrane without the use of energy. Examples include diffusion and facilitated diffusion. Active transport describes the use of energy to …

  10. Cell membranes: Aquaporins (practice) | Khan Academy

    Movement of water across cell membranes occurs by simple diffusion. However, a large amount of highly selective and osmotic gradient driven water transport through the cell membranes of renal …