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- 1. Open EndedHow many different types of molecules are shown in Model 1?
- 2. Open EndedNumber of triangles and circles on each side of membrane?
- 3. Open EndedWhich shape is larger?
- 4. Open EndedDescribe direction of movement of molecules in Model 1.
- 5. Open EndedWhich molecules are able to pass through the semi-permeable membrane?
- 6. Open EndedWould you expect the Model 1 system to change over time?
- 7. Open EndedWhat two major types of biological molecules compose the majority of the cell membrane in Model 2?
- 8. Open EndedHow many different protein molecules are found in Model 2?
- 9. Open EndedWhat is the difference between the position of the surface proteins and the membrane-spanning proteins?
- 10. Open EndedWhen a carbohydrate chain is attached to a protein, what is the structure called?
- 11. Open EndedWhen a carbohydrate is attached to a phospholipid, what is the structure called?
- 12. Open EndedWhat types of molecules are shown moving across the membrane?
- 13. Open EndedWhere exactly in the membrane do these molecules pass through?
- 14. Open EndedHow does the concentration of the small molecules inside the cell compare to that outside the cell?
- 15. Open EndedDoes Model 2 indicate that the molecules are moving in equal amounts in both directions?
- 16. Open EndedLooking at Models 1 and 2. Which particles are moving by diffusion across the membranes?
- 17. Open EndedDiffusion is the net movement of molecules from an area of (low/high) concentration to an area of (low/high) concentration.
- 18. Open EndedThe molecules will continue to move along this (semi-permeable membrane/concentration gradient) until they reach (diffusion/equilibrium).
- 19. Open EndedOnce equilibrium is reached, molecules will continue to move across a membrane (randomly/in one direction).
- 20. Open EndedModel 3, which part of the cell membrane is shown in more detail?
- 21. Open EndedWhat is the gap between the proteins called?
- 22. Open EndedWhat type of molecules attach to the protein?
- 23. Open EndedHow do the glucose molecules pass through the channel protein?
- 24. Open EndedWhy is the protein channel in Model 3 called a "gated" channel?
- 25. Open EndedWhy is diffusion called "facilitated" diffusion?
- 26. Open EndedWhy is facilitated diffusion necessary for the transport of charged ions such as Na+ and K+ across the cell membrane?
- 27. Open EndedWhich part of the cell membrane is shown in more detail in Model 4?
- 28. Open EndedWhat shape represents the substance being transported across the membrane in Model 4?
- 29. Open EndedList two binding sites found on the protein.
- 30. Open EndedIn which direction is the transported substance moving-from an area of high concentration to low or from an area of low concentration to high?
- 31. Open EndedHow is ATP (energy) being used in Model 4?
- 32. Open EndedWhat happens to the ATP after it binds to the protein?
- 33. Open EndedWhy does active transport require energy from the cell?
- 34. Open EndedComplete the Active Transport or Passive Transport Table
- 35. Open EndedDefine active transport
- 36. Open Ended35. Which type of cell transport would be best to move substances into or out of the cell quickly?
- 37. Open Ended36. Which type of transport would be the best if the cell needs to respond to a sudden concentration gradient difference?
- 38. Open Ended37. Why would the line representing facilitated diffusion level off as the concentration gets higher, while the line representing diffusion continues to go up at a steady rate?
- 39. Open Ended38. Why does active transport start off with such a high initial rate compared to diffusion and facilitated diffusion?
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