Chapter 3.3: Cell Membranes

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Cell membranes are composed of two phospholipid layers.
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Presentation transcript:

Chapter 3.3: Cell Membranes Chapter 3: Cells Section 3: Cell Membranes Unit 6: Cell Biology Chapter 3.3: Cell Membranes

Cell Membrane Presentation Inquiry Investigation Chapter 3: Cells Section 2: Cell Organelles Agenda for Today Do Now! Cell Membrane Presentation Inquiry Investigation Cell Membrane Modelling

Recall: Why do phospholipids orient themselves in water like they do? Chapter 3: Cells Section 3: Cell Membrane Phospholipids Have a phosphate/glycerol head and two fatty acid tails. Head is hydrophilic & tails are hydrophobic. Naturally orient themselves in water so that the head faces water and the tails face each other Recall: Why do phospholipids orient themselves in water like they do?

Chapter 3: Cells Section 3: Cell Membrane

Phospholipids in a Cell Membrane Chapter 3: Cells Section 3: Cell Membrane Phospholipids in a Cell Membrane

What are some of the functions of these proteins? Chapter 3: Cells Section 3: Cell Membrane The Cell Membrane Sometimes called “fluid membrane” or “phospholipid bilayer” Composed of a double layer of phospholipids. Forms spontaneously because of hydrophobic/hydrophilic interactions Has many kinds of proteins embedded in it. What are some of the functions of these proteins?

Chapter 3: Cells Section 3: Cell Membrane The Fluid Mosaic Model

Very much like nuclear pores in structure and function. Chapter 3: Cells Section 3: Cell Membrane Embedded proteins Very much like nuclear pores in structure and function. Some are channels, allowing things to pass through the membrane. Some are receptors that receive a signal and transmit the message to the cell.

Journey Inside the Cell Membrane Chapter 3: Cells Section 3: Cell Membrane Journey Inside the Cell Membrane

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