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Transcript
Name ________________________________________Hr___ Unit 6 Test Review- Cell Boundaries – Ch 7-3 1. What do Carbohydrate chains attached to proteins in the cell membrane act as? _____________ 2. A substance can pass freely through the phospholipids if it is ________________________ and/or_____________________. 3. The cell membrane can be described as _________________ __________________ ,because it allows only certain substance to pass through. 4. What types of organisms do NOT have a cell wall? _________________________ 5. Is the head of the phospholipid molecule hydrophobic or hydrophilic? _____________________ What about the tail? _________________________ 6. The phospholipids molecule consists of a polar_____________ and a nonpolar _______________. 7. Diffusion stops because _________________________ has been reached. 8. The movement of glucose into cells is achieved by (what process)__________________________. 9. A contractile vacuole can be found in ________________ and used for ____________________ excess ________________. 10. The movement of substances FROM an area of LOW concentration TO an area of HIGH concentration and requiring energy is called ______________________. 11. The movement of water through a selectively permeable membrane is ______________________. 12. The “eating” of a particle by a white blood cell or single celled organism, such as an Amoeba is known as _________________________________. 13. Osmosis is a type of ________________transport . Osmosis is also a type of ________________ 14. The release of a particle out of a cell is known as _________________________. 15. If oxygen moved into or out of the cell, what would this process be called? __________________ 16. The movement of glucose into and out of red blood cells is an example of ______________________ 17. Lipids, carbohydrates and proteins can all be found in what part of the cell? ___________________ 18. How does the cell wall counteract osmotic pressure of the cell membrane? ____________________ ___________________________________ 40% H2O 60% Oxygen 60% H2O 40% Oxygen 19. Would oxygen be most likely to…move into the cell, move out of the cell, or go both ways equally? Circle 20. Would water be most likely to … move into the cell, move out of the cell, or go both ways equally? Circle 21. In the cell membrane, do the polar ends of the phospholipids make up the inside or outside of the lipid bilayer? __________________________ Use the following scenario to answer the following questions A SALTWATER FISH LIVES IN A 50% SALT/50% WATER ENVIRONMENT WHERE IT’S CELLS REMAIN A CONSTANT SIZE. A BIOLOGIST THEN TRANSFERS THE FISH TO A FRESH 98%WATER ENVIRONMENT. 1. What is an isotonic solution for this cell? ___________________________ 2. In the freshwater, is the amount of water entering the cells of the fish greater than, less than, or equal to the amount of water leaving the cells? ______________________________________________ 2. In the salt water, is the amount of water entering the cells of the fish greater than, less than, or equal to the amount of water leaving the cells? _____________________________________________ 3. In fresh water, the cells of the fish will probably become what size? _______________________ Plastic Bag Lab 1. What part of the cell did the plastic bag represent? _________________________________ 2. What characteristic/property (not process) of this cell part was shown in this lab? ______________ 3. Did the iodine molecules, move into the bag, move out of the bag, or not move at all? ______________ 4. How do you know whether or not the iodine molecules moved? _______________________________ 5. Did the starch molecules move into the bag, move out of the bag, or not move at all? 6. One molecule moved through the bag and the other did not, what does that show about the membrane? 7. By what process did the molecule(s) move? _________________________ Potato Lab 1. What process was demonstrated in this lab? ____________________ 2. Did the potato get more firm or more flexible after being placed in the 50% water:50% salt solution? circle 3. Did the potato get more firm or more flexible after being placed in the 100% water solution? __________ Hypertonic, Hypotonic, or Isotonic? 45. Water will move out of the cell. ____________________ 46. Water will move in and out of the cell at the same rate. ___________________ 47. Water will move into the cell. ______________________ 48. Has a lower concentration of water and higher concentration of solute than a cell. _______________ 49. Has a higher concentration of water and lower concentration of solute than a cell. _______________ 50. Has a concentration of water and solute equal to that of the cell. ____________________ 51. Cell will expand in size. ___________________ 52. Cell will shrink in size. _____________________ 53. Cell will stay the same size. __________________ Diffusion Facilitated diffusion Active or Passive Transport Movement of molecules: from__to__ Energy: Yes or No Movement: Into cell Out of cell Both in & out An example of a molecules that uses this process Osmosis Endocytosis Exocytosis Protein pumps