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Transcript
Cell Membrane Structure Notes Name _____________________ Date __________ Cell Membrane Structure: 1. 2. 3. 4. 5. What is the purpose of the cell membrane? _________________________ What is another name for the cell membrane? _________________________________ Do animal cells have a cell membrane? _______________ What does homeostasis mean? _____________________________________________ How does the cell membrane maintain homeostasis? ___________________________________________________________________________ 6. What are the 7 functions of the cell membrane? a. _________________________________________ b. _________________________________________ c. __________________________________________ d. _________________________________________ e. _________________________________________ f. __________________________________________ g. ____________________________________________ 7. What is the main component that makes up most of the cell membrane? ______________________________ 8. What two parts make up a phospholipid? __________________ and _________________ 9. The polar head of the phospholipid is made up of what? __________________________________ 10. The nonpolar tail of the phospholipid is made up of what? ______________________________ 11. What are 3 other things that make up the cell membrane? ___________________________________________________________________ 12. What is the difference in an INTEGRAL PROTEIN and a PERIPHERAL PROTEIN in a cell membrane? ____________________________________________________________________ 13. Why is the cell membrane also referred to as the “Fluid Mosaic Model?” ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ 14. What is the difference in hydrophilic and hydrophobic? _______________________________________________________________ 15. What part of the phospholipid is hydrophilic? ___________________________________ 16. What part is hydrophobic? _________________________________________________ 17. What does it mean that the cell membrane is “Selective?” ______________________________________________________________________ 18. How many layers of phospholipids make up the cell membrane? ______________________ 19. Because of the 2 layers, what is it called? ___________________________________ 20. Why type of molecules pass through the cell membrane easily? _________________________ 21. What type of molecules do NOT pass through the cell membrane easily? ________________________________________ Chapter 7 Cell Transport Notes Name _____________________________ Date ________________ 1. What are the 2 categories of cell transport? _________________________ and ___________________________ 2. What does passive mean? __________________________________________ 3. What does active transport mean? ______________________________________ 4. What are the 3 types of passive transport? ___________________, ________________, and ________________________ 5. What is the one type of cell transport that is under the category ACTIVE? __________________________________ Diffusion 1. Is Diffusion passive or active? _________________ 2. Does diffusion require energy to move things across the cell membrane? ___________________________________ 3. How do molecules move by diffusion? ____________________________________________ 4. When Molecules moving from a high concentration to a low concentration is called what? _________________________________________________ 5. Describe an example of diffusion. ______________________________________________________________________ 6. Draw an arrow in the diffusion example below on which way the molecules will move. Osmosis 7. Define Osmosis. __________________________________________________________________________ 8. In what direction does water move in osmosis? _____________________________________________________________________ 9. What are Aquaporins? ________________________________________________________________________ 10. What does isotonic mean? _________________________________________________ 11. If a cell is placed in an ISOTONIC solution, which way does water move? (into the cell or out of the cell or both equally)? ______________________________________________________________ 12. What does Hypotonic mean? _____________________________________________________________________ 13. If a cell is placed in a HYPOTONIC solution, which way does the water move? ______________________________________________ 14. What does Hypertonic mean? _______________________________________________________________________ 15. If a cell is placed in a HYPERTONIC solution, which way does the water move? ____________________________________________ 16. Label each cell below as hypertonic, hypotonic, or isotonic. a. ________________ b. __________ c. _______________ 17. What is the term used that means “cell bursting?” ____________________________________________________________ 18. What is the term used that means “cell shrinking?” _________________________________________________________________ Facilitated Diffusion 1. What does facilitate mean? __________________________________________ 2. Is Facilitated Diffusion Active or Passive? ______________________________ 3. Does facilitated diffusion need energy? _____________________ 4. How do molecules move in facilitated diffusion? (up or down their concentration gradient) ________________________________________________ 5. What does facilitated diffusion require to move things across the cell membrane? __________________________________ 6. What type of protein is in the cell membrane have a pore for materials to pass through? _________________________ 7. What type of protein changes shape and carries molecules across the cell membrane? ___________________________________ Active Transport 1. Is Active Transport active or passive? ________________________ 2. Does active transport require energy to move things across the cell membrane? _______________________________ 3. What is the energy called that is needed by cells for active transport? _____________________ 4. How do molecules move in active transport? _______________________________ 5. Do they move up or down their concentration gradient? ______________________________ 6. What is an example of Active Transport? ______________________________________________________________ 7. What does Exocytosis (Active Process) mean? ______________________________________________________________ 8. What does Endocytosis mean? ___________________________________________________________________ 9. What does Pinocyotosis mean? _______________________________________________________________ 10. What does Phagocytosis mean? ______________________________________________________________________