Section 5.1 How Is the Structure of a Membrane Related to Its Function?
- Describe the major functions of cell membranes.
- Explain the fluid mosaic model of cell membranes.
- Explain how the polar nature of phospholipids gives rise to the membrane structure.
- Describe how the hydrophobic tails of phospholipids contribute to isolating the cell from its environment.
- Describe the functions of the five different types of membrane proteins.
Section 5.2 How Do Substances Move Across Membranes?
- Discuss the relationship between the terms solute, solvent and concentration.
- Explain how random motion combined with a concentration gradient results in diffusion.
- Describe the external factors affecting the rate of diffusion.
- Discuss the major difference between passive and active transport.
- Explain the basis for the selective permeability of the membrane.
- Describe the differences and similarities between simple diffusion, facilitated diffusion and osmosis.
- Explain the terms isotonic, hypertonic and hypotonic and their relationship to osmosis between a cell and its environment.
- Explain how osmosis and turgor pressure provide support for plants.
- Explain why cells engage in active transport.
- Discuss the various types of endocytosis and exocytosis.
- Relate the process of diffusion to the size limit of a single cell.
Section 5.3 How Do Specialized Junctions Allow Cells to Connect and Communicate?
- Describe the structural and functional differences between desmosomes, tight junctions and gap junctions.
- Describe the structure and functions of plasmodesmata.