Lecture 4.1 Competencies and Study Guide
Membranes and Membrane Transport
Vocabulary
- Endomembrane system
- Integral membrane protein
- Phospholipid
- Phosopholipid bilayer
- Diffusion
- Ion channel
- Carrier protein
- Facilitated diffusion
- Active transport
Competencies
- State which cell structure uses the most metabolic energy.
- Identify the main molecular class out of which biological membranes are made.
- Describe the structure of a phospholipid.
- Describe the organization of the phospholipid bilayer in biological membranes.
- Explain how a simple phospholipid bilayer differs from a living biological membrane.
- Define integral membrane protein, and describe their three domains.
- Describe the role of cholesterol in biological membranes.
- Describe the role of cell adhesion proteins.
- Describe the concentration differences of Na+ and K+ inside and outside cells.
- Explain the purpose of the non-equilibrium distributions of Na+ and K+ across cell membranes.
- Explain the physical mechanism causing diffusion.
- Describe the main function of cell membranes.
- Describe the mechanism of passive membrane transport for lipids like steroid hormones.
- Describe the mechanism of passive membrane transport for ions like Na+ and Ca2+.
- Describe the mechanism of passive membrane transport for large organic molecules like glucose.
- Describe the mechanism of active membrane transport.
- Explain under what circumstances passive or active membrane transport will be used by living cells.