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Cell Membrane Function- Protection & Controls what enters and leaves the cell Structure- Double layered Phospholipid membrane Selectively Permeable.

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Presentation on theme: "Cell Membrane Function- Protection & Controls what enters and leaves the cell Structure- Double layered Phospholipid membrane Selectively Permeable."— Presentation transcript:

1 Cell Membrane Function- Protection & Controls what enters and leaves the cell Structure- Double layered Phospholipid membrane Selectively Permeable

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4 Diffusion Process where molecules move from area of high concentration to low concentration to reach equilibrium Cell does NOT use energy for diffusion Examples: water, alcohol, small lipids

5 Osmosis Movement of WATER across a cell membrane
Turgor Pressure- pressure on cell membrane resulting from movement of water Plasmolysis- Water leaves cell; cell shrinks Cytolysis- Water enters cell; cell bursts

6 Solutions Isotonic- Equal solutes Hypotonic- Less solutes
Hypertonic- More solutes

7 Facilitated Diffusion
Molecules move freely through protein channels Examples: Ions, sugars, salts

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