Chapter 6 Outline

Membrane Structure and Function

The structure and function of the plasma membrane, including how molecules get in and out of cells, are covered in this chapter. Cell surface modifications are also included.

Chapter Outline

In this chapter outline, the learning objectives and the selected key terms are given for each major head in the chapter.

Membrane Models Have Changed (p. 84)

1. Contrast the sandwich model of membrane structure with the fluid-mosaic model,

and cite the evidence supporting these models.

Selected Key Terms: fluid-mosaic model

The Plasma Membrane Is Complex (p. 86)

2. Describe the arrangement of the lipid component, and give a function for each type

of lipid in the membrane.

3. Describe the arrangement of the protein component, and give several functions for

these proteins.

phospholipid, cholesterol

How Molecules Cross the Plasma Membrane (p. 90)

4. Define diffusion and osmosis, and explain their relevance to cell biology.

5. Describe the appearance of a plant cell and an animal cell in isotonic, hypotonic, and

hypertonic solutions.

6. Name two types of transport by carrier proteins, and give an example for each.

7. Contrast endocytosis and exocytosis. Name three types of endocytosis and

differentiate among them.

differentially permeable, diffusion, solute, solvent, osmosis, osmotic pressure,

tonicity, isotonic solution, hypotonic solution, turgor pressure, hypertonic solution,

plasmolysis, carrier protein, facilitated transport, active transport, sodium-potassium

pump, exocytosis, endocytosis, phagocytosis, pinocytosis, receptor-mediated

endocytosis

The Cell Surface Is Modified (p. 98)

8. Describe the dynamic nature of the extracellular matrix.

9. Describe the composition of the plant cell wall.

10. List and describe three types of junctions that occur between animal cells. Name

and describe one type of junction between plant cells.

plasmodesma
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