Transport of Material Within Membrane Bound Compartments 46 page 114 Transport

Transport of material within membrane bound

This preview shows page 21 - 24 out of 27 pages.

- Transport of Material Within Membrane-Bound Compartments, 4.6 page 114 Transport of Molecules into Cells by Endocytosis Transport of Molecules Out of Cells by Exocytosis - Epithelial Transport: Movement of Molecules Across Two Membranes, 4.7 page 117 Epithelial Structure Epithelial Solute Transport Epithelial Water Transport
Image of page 21
Transcytosis Level Teacher Objectives - Explain the role of chemical, electrical, and electrochemical driving forces in the passive transport of substances across a membrane, and distinguish between passive transport and active transport.- Identify the three general factors that influence the rate at which a substance can be passively transported across a membrane and identify the two general factors that influence the rate of active transport.- Identify four factors affecting the permeability of membranes to molecules that cross by simple diffusion, and explain how and why each affects permeability.- Compare the movement of molecules across the plasma membrane by carriers and through channels.- Explain the distinction between primary and secondary active transport, and give examples of each.- Explain how a difference in solute concentrations across a membrane can cause the movement of water, and explain the distinction between the osmolarity and tonicity of a solution.- Define endocytosis and exocytosis and explain the primary difference between these and other mechanisms of cellular transport. Distinguish between receptor mediated endocytosis and pinocytosis.- Explain in general terms how the polarity of epithelial cells enables them to absorb or secrete materials.AreaActivities- Factors Affecting the Direction of Transport, 4.1page 94- What determines if passive transport or active transport will be necessary to move molecules across the plasma membrane?Passive Transport Versus Active Transport- How does the transport of molecules across a membrane follow the same principles as chemical reactions?- What is the difference between passive and active transport?- What is simple diffusion?- In which of these processes do pumps play a role?Driving Forces Acting on Molecules- What is a driving force?- In which direction is this force?- How can these forces arise?- What are the 3 types of driving forces that usually influence the movement of molecules?Chemical Driving Forces- When does a concentration gradient exist across a membrane?- What kind of driving force is a concentration gradient?- The magnitude of the chemical driving force increases as what increases? (remember, the symbol Δ,
Image of page 22
Image of page 23
Image of page 24

You've reached the end of your free preview.

Want to read all 27 pages?

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture