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Do This: Have a seat and get out your notebook. Series: Cells S2E4: The Cell Membrane Objective: Explain the function of the cell membrane Do This: Have a seat and get out your notebook.

The Cell Membrane

The Cell Membrane Cell membranes are made of two lipid layers

The Cell Membrane Cell membranes are made of two lipid layers Lipids have a hydrophilic head and hydrophobic tails

The Cell Membrane Cell membranes are made of two lipid layers Lipids have a hydrophilic head and hydrophobic tails The tails point to the inside of the membrane

B. Functions

B. Functions Forms a boundary

B. Functions Forms a boundary Controls passage of materials

C. The cell membrane is selectively permeable

C. The cell membrane is selectively permeable Some molecules can cross while others cannot.

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