ch03 - Chapter 3 Chapter Objectives INTRODUCTION 1. Define...

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Chapter 3 Chapter Objectives INTRODUCTION 1. Define a cell 2. Describe the purpose of cell division. 3. Relate the essential importance of the cellular level of organization to all life forms. PARTS OF A CELL 4. Describe the three principal parts of a cell THE PLASMA MEMBRANE 5. Describe how the “fluid mosaic model” concept appropriately describes the nature and structure of the plasma membrane. Structure of the plasma membrane 6. Explain how the chemical nature of the distinct regions of phospholipids automatically produces a lipid bilayer in a water solution, with a range of properties 7. Describe the function of cholesterol and glycolipids in membranes. 8. Distinguish between integral and peripheral proteins in cell membranes. Functions of Membrane Proteins 9. Compare and contrast the chemistry and function of the classes of membrane proteins, including ion channels, transporters (carriers), receptors, enzymes, linkers and cell identity markers Membrane Fluidity
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proteins. 11. Explain how cholesterol modifies membrane fluidity. Membrane Permeability 12. Explain the mechanisms and factors involved in the selective movement of materials across the cell membrane. Gradients Across the Plasma Membrane 13. Define a chemical and electrical gradient and the predominant ions involved on opposite sides of the plasma membrane. 14. Explain how an electrical gradient leads to the membrane potential that exists in cells of the body. TRANSPORT ACROSS THE PLASMA MEMBRANE 15. Distinguish between passive and active processes, including direction of particle movement and energy requirements. Passive processes 16. Explain how the kinetic energy of random motion and concentration diffusion and may result in equilibrium. 17. List and explain the factors that influence the diffusion rate of substances in solution. 18. Explain the concept of simple diffusion and list substances that pass through the bilayer by simple diffusion. 19. Explain the differences between simple and facilitated diffusion.
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ch03 - Chapter 3 Chapter Objectives INTRODUCTION 1. Define...

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