Plasma Membrane.

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Presentation transcript:

Plasma Membrane

The Plasma Membrane Outer covering of cell. Maintains homeostasis (keeps internal environment the same)

The Plasma Membrane Selectively permeable (sometimes known as semi- permeable) Only some things can go in and some things can out. Can you think of something else selectively permeable?

The Plasma Membrane Is a lipid bilayer (has 2 layers) Each layer is made of phospholipids: Head: hydrophillic Tail: hydrophobic

Fluid Mosaic Model

Channel Proteins Proteins embedded in the cell membrane allow larger molecules to pass through.

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