2.11 to 2.16 Cell Transport Lesson

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​Just like the gif to the right, only the smaller blue substances can enter and leave the cell, but the green ones cannot.

• ​Does NOT require energy!

• Moves particles from an area of high concentration to an area of low concentratio

​1. Simple Diffusion

​2. Facilitated Diffusion

​3. Osmosis

​Substances move with the concentration gradient. This means they move from high to low concentration.

​The smaller particles are water molecules.

• Requires energy to move particles over the cell membrane.

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• Moves from low to high concentration. (Against the concentration gradien

​Endocytosis moves substances into the cell

​Exocytosis moves substances out of the cell