6-cell membrane web quest PDF

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biology course work to help you understand biology. It is for understanding biology in preparation for the first year in university for any course relating to biology. good to have....

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SBI4U Cell Membrane Video and Internet Activity Video: Crash Course Biology- Membranes and Transport 1. Define the following terms: a. Diffusion: b. Osmosis: c. Hypertonic: d. Hypotonic: e. Isotonic: f. Aquaporin: g. Active Transport: Website: Construction of the Cell Membrane http://www.wisc-online.com/Objects/ViewObject.aspx?ID=ap1101 1. Briefly describe the composition of the cell membrane. What macromolecules does it contain?

2. What are the two major types of proteins found in the cell membrane? Write a brief description of each.

3. List three examples of globular proteins and explain their function in the cell (note: the functions will be identified later in the animation)

4. What types of substances can easily pass through the membrane? Which can’t? Give examples of each type.

5. What is the function of cholesterol in an animal cell? Why do you think it is found in animal cells but not plant cells?

6. Draw the cell membrane you created in the space below.

*Answer the questions at the end of the animation to review what you just learned! Website: Interactive Concepts in Biochemistry http://www.wiley.com/college/boyer/0470003790/animations/membrane_transport/membrane_tr ansport.htm ***There is a subheading for each animation. Look on the panel on the left to find the correct animation. Answer all the questions in your own words. Do not copy directly from the website! Part 1: Overview 1. Define the term cellular transport.

2. Why is transport across the cell membrane important? (State 2 reasons)

Part 2: Membranes 1. How are some small polar molecules able to enter the cell? Do you think this method alone is sufficient for providing the cell with enough of these molecules (glucose, water, etc.)?

Part 3: Diffusion/Osmosis 2. Define the following terms: a. Diffusion:

b. Osmosis:

c. Semi-permeable membrane:

3. Describe what happened in the balloon animation with the sugar impermeable membrane. Draw a picture to aid in your description.

Part 4: Passive Transport/ Active Transport 4. What are the 3 steps involved in the facilitated transport of a substance across the cell membrane? Draw a labeled diagram to explain your answer.

5. Define the following terms and give an example of each: a. Passive Transport:

b. Active transport

6. Explain the difference between the two balloons separated by glucose permease and the two balloons separated by plasma membrane....