CHAPTER 5 The dynamic cell membrane

CHAPTER 5 The dynamic cell membrane - CHAPTER 5 The dynamic...

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CHAPTER 5 The dynamic cell membrane I. The lipid bilayer 1. main component: 1. Phospholipids figure 5.2 -has 2 fatty acids tails hydrophobic (non polar, repel water) -2 heads hydrophilic (polar, attract water) -cholesterol molecules as used as stabilization -2 layers of phospholipids 2. The fluid mosaic model -The cell membrane is constantly in motion -figure 5.4 3. Membrane proteins -Proteins can be (I ) integral: always part of the cell membrane. -peripheral (P): proteins that come and go as needed. 1.Adhesion proteins attachment: I function: attach cells, receptors 2. Enzymes: attachment: I or P function:speed up chemical reactions 3. receptor proteins attachment: I or P function: signal/communicate with other cells, imunity 4. Recognition protein: attachment: I Function: identifies cell type (as in self or non self), immunity ( cells signaled to destroy it if its on the outside) -Transport proteins
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5. passive transporter attachment: I function: transport molecules, ions through membrane
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This note was uploaded on 03/19/2011 for the course BIO 110 taught by Professor Hemsley during the Spring '11 term at Harper.

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CHAPTER 5 The dynamic cell membrane - CHAPTER 5 The dynamic...

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