Rather than lecture on a Friday, we will be reviewing by using the CD-ROM. Answer the questions below and turn it on by Wed at the start of class. We are using the CD-ROM to give you an idea as to how it can be used to study from in the future – the chapter quiz and flash cards are very useful, especially if we have covered the entire chapter. Even when not assigned, it is a good idea to review with the CD-ROM before a test.

Load the Starr/Taggart CD-ROM and go to Unit 1, Chapter 5. You will start on section 1 of 3, "Membrane Structure and Function." Notice the screen consists of three parts: a picture screen in the upper left corner, 6 buttons on the bottom left corner, and text on the right side of the screen. If you ever want a short version of the text, the version on the CD-ROM is a bit shorter and the key terms are hyperlinked, so clicking on the word give a quick definition. Keep this in mind as we proceed through difficult chapters. For this lesson, we will be clicking on the icons at the bottom left portion of the screen.

Start on Section 1/3, "Membrane Structure and Function." The numbers below refer to the icon that should be selected. Watch, read or follow the information and then answer the following questions (questions underlined)

Icon #1 – Describe what would happen to a plasma membrane if you were to puncture it with a probe:

Icon #2 – List five components of a typical plasma membrane:

Icon #5 – In an experiment, the plasma membranes of a human cell and a mouse cell were fused together. What happened? How does this support the ‘fluid mosaic’ model of a membrane?

Icon #6 – IN YOUR OWN WORDS, explain the four types of proteins that form portions of the plasma membrane.

Go to Section 2/3, "Diffusion, Osmosis and Tonicity"

Icon #1 – a. Which substances successfully diffuse across the membrane?

b. List the items that do not successfully pass through the membrane and explain why they didn’t successfully cross the membrane.

Icon #2 – Define HYPOTONIC, HYPERTONIC, and ISOTONIC

Icon #5 – Why does it kill a plant to water it with an extremely salty (or a solution with a high concentration of fertilizer) solution?

Go to Section 3/3, "Transport Across Membranes"

Icon #1 – Explain Passive Transport:

Icon #2 – Explain Active Transport:

Icon #3 – What is the difference between exocytosis and endocytosis?

Take the chapter quiz (10 questions) after completing the above assignment. List the questions (#s) you missed below – not for a grade, but to give me an idea of what we should cover on Wed: