Cellular Environment, Membranes, and Transport

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Across
  1. 2. A membrane that allows certain substances to pass while restricting others.
  2. 8. A protein that pumps sodium out and potassium into the cell using ATP.
  3. 9. The voltage difference across the plasma membrane.
  4. 12. The movement of water across a selectively permeable membrane.
  5. 13. processes Transport that requires energy (ATP).
  6. 14. A double layer of phospholipids forming the basis of the plasma membrane.
  7. 17. The outer boundary of the cell that separates its contents from the environment.
  8. 19. Diffusion through a membrane via transport proteins.
  9. 21. Endocytosis involving specific receptors to bring substances into the cell.
  10. 22. A solution with a lower concentration of solutes than the cell.
  11. 23. The ability of a solution to affect the shape or tone of cells.
  12. 24. A form of endocytosis where cells engulf large particles or debris.
  13. 27. A form of endocytosis where cells take in fluids and dissolved solutes.
  14. 28. The model describing the plasma membrane as a dynamic, flexible structure.
  15. 29. The fluid portion of the cytoplasm.
  16. 30. The difference in concentration of a substance across a space.
  17. 31. (ICF) The fluid inside the cell.
  18. 32. (ECF) The fluid outside the cell.
Down
  1. 1. The movement of large molecules or fluids using vesicles.
  2. 3. Transport powered by the movement of another substance down its gradient.
  3. 4. Movement of molecules from high to low concentration.
  4. 5. Proteins embedded within the plasma membrane.
  5. 6. All chemical reactions occurring within a cell.
  6. 7. The process of expelling substances from the cell using vesicles.
  7. 10. A solution with the same concentration of solutes as the cell.
  8. 11. Transport that directly uses ATP to move substances across the membrane.
  9. 15. processes Transport that does not require energy.
  10. 16. Proteins attached to the surface of the plasma membrane.
  11. 18. The process of bringing substances into the cell using vesicles.
  12. 20. The baseline electrical charge difference across the membrane.
  13. 22. A solution with a higher concentration of solutes than the cell.
  14. 25. The cellular material between the plasma membrane and the nucleus.
  15. 26. Diffusion of molecules directly through the plasma membrane.