Cell Membranes

Objectives

• 1. Understand the biochemistry of phospholipids and how they are organized into membranes.

  2. Know the function of each of the four components of a cell membrane.

  3. Understand when endocytosis and exocytosis are used by cells, the mechanism of the process, and the role in bulk transport.

  4. Differentiate among diffusion, facilitated transport, facilitated diffusion, osmosis, and active transport.

  5. Describe the six classes of membrane proteins and how each interacts with the membrane.

  6. Describe solution and solute movement into and out of a cell under hyper-osmotic, hypo-osmotic, or isosmotic conditions.

  7. Explain and give examples of endocytosis, phagocytosis, pinocytosis, receptor-mediated endocytosis, and exocytosis.

  8. Understand the importance of selective permeability in biological systems.

  9. Describe the operation of the sodium potassium pump and the proton pump.

  10. Understand the importance of coupled channels, cotransport, and countertransport.