Name: Period: Date: Cell Transport Tutorials CELL MEMBRANE
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1 Cell Transport Tutorials CELL MEMBRANE Click through the animation. As you do, answer the following questions: 1. What is the fundamental unit of life? 2. What are the two main components that make up the cell membrane? A. B. 3. What are the two major types of proteins in the cell membrane? A. B. 4. What types of molecules can EASILY go through your cell membrane or are PERMEABLE to the cell membrane? Examples: (Hydro- ) A. B. C. 5. What types of molecules CANNOT easily go through your cell membrane? (Hydro- ) Examples: A. B. C. D. 6. Draw the phospholipid bilayer of the cell membrane, labeling the hydrophilic heads and hydrophobic tails. 7. What are fibrous proteins typically used for? 8. What are the integral globular proteins typically used for? 9. What are peripheral globular proteins used for? 10. What is the function of carbohydrates in the cell membrane?
2 8. What is the function of cholesterol in the cell membrane? Match the description/function to the appropriate cell membrane structure. 9. Allows specific ions and other polar molecules to pass through the membrane A. Glycoprotein 10. Only found in animal cell membranes 11. Span the entire membrane and serve as a receptor for the cell 12. Found on the surface of the membrane, they help identify the cell 13. Allow water molecules to pass through the membrane B. Channel Protein C. Pore Protein D. Fibrous Protein E. Cholesterol Complete all 10 questions, while doing so, draw a picture of each part: Phospholipid Glycoprotein Channel Protein Pore Protein Fibrous Protein Cholesterol
3 PASSIVE TRANSPORT PART ONE: Choose PASSIVE TRANSPORT FIRST 1. Define PASSIVE TRANSPORT: 2. What are three types of PASSIVE TRANSPORT? A. B. C. PRESS NEXT PARTS of a CELL MEMBRANE: 3. Draw what a CELL MEMBRANE looks like and label the TWO COMPONENTS of the CELL MEMBRANE below: 4. What is the function of INTERGRAL PROTEINS? 5. Cell Membranes are said to be SEMIPERMEABLE, what does that mean? DIFFUSION 1. Define simple diffusion and ILLUSTRATE a before and after example:
4 2. Complete the following picture on your paper, with an arrow, as shown in the animation: Area of higher Concentration Area of lower Concentration 3. Define a CONCENTRATION GRADIENT: 4. Identify THREE factors that can have an effect on the RATE of DIFFUSION: A. B. C. 5. Diffusion stops when a cell reaches. 6. What is meant by the term EQUILIBRIUM? FACILITATED DIFFUSION 1. Define facilitated diffusion: 2. Does facilitated diffusion take energy for the cell? 3. What molecules within the cell membrane play a VITAL ROLE in FACILITATED DIFFUSION? 4. What does the word FACILITATE mean? _
5 OSMOSIS 1. Define osmosis: 2. Explain how osmosis is a UNIQUE form of diffusion. Now go to: Make your way through the website and complete the questions: ISOTONIC SOLUTION 1. What is an isotonic solution? 2. Draw a picture of the net water movement in a cell in a isotonic solution. 3. What happens to cells in an isotonic solution? HYPOTONIC SOLUTION 4. What is a hypotonic solution? 5. Draw a picture of the net water movement in a cell in a hypotonic solution. 6. What happens to cells in a hypotonic solution? HYPERTONIC SOLUTION 7. What is a hypertonic solution?
6 8. Draw a picture of the net water movement in a cell in a hypertonic solution. 9. What happens to cells in a hypertonic solution? Search the internet to answer the following question. 1. What are the two characteristics of active transport? a. b. ACTIVE TRANSPORT Active Transport: Click Menu on the bottom left and then click on Active Transport. 1. What is the difference between active and passive transport? (there are 2 differences) a. b. Play the animation. Click continue and play as you go to move forward. 2. What is an ion pump? What does it require? 3. What does it move out of the cell? 4. Why is this considered a pump? 5. Define cotransport.
7 Endocytosis and Exocytosis: Play the animation to see an overview of endocytosis and exocytosis. 6. What are the three types of endocytosis? What does each type transport? a. b. c. 7. What is the difference between endocytosis and exocytosis?
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