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Chapter 7

Cell Membranes, Transport and Communication

EBook

Chapter 7: Cell Membranes, Transport, and Communication

Mysterious Memory Loss

7.1 The Plasma Membrane as Gate and Gatekeeper

  • In diffusion, substances move passively down a concentration gradient
  • Some small molecules can diffuse through the phospholipid bilayer

7.2 Osmosis

  • Biology Matters: Osmosis in the Kitchen and Garden

7.3 Facilitated Membrane Transport

  • Passive carrier proteins mediate facilitated diffusion
  • Active carrier proteins move materials against a concentration gradient

7.4 Endocytosis and Exocytosis

7.5 Cellular Connections

7.6 Cell Signaling

  • Does Cholesterol Play a Role in the Cell Membranes of the Brain?

Biology in the News: "Good" Cholesterol May Lower Alzheimer’s Risk

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