Unit 2 Crossword Puzzle

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Across
  1. 2. molecule forming the main structure of cell membranes
  2. 3. membrane protein allowing substances to pass through
  3. 5. movement across a membrane without energy
  4. 7. amount of space occupied by an object
  5. 9. solution with equal solute concentration on both sides
  6. 12. ability to allow some substances through while blocking others
  7. 14. total area of the outside of an object
  8. 16. difference in concentration between two areas
  9. 17. movement of molecules from high to low concentration
  10. 18. process of bringing materials into a cell
  11. 19. division of cell functions into specialized areas
  12. 20. solution causing a cell to gain water
Down
  1. 1. amount of a substance in a given space
  2. 4. diffusion of water across a membrane
  3. 6. solution causing a cell to lose water
  4. 8. process of releasing materials from a cell
  5. 10. movement of substances into out of or within cells
  6. 11. movement across a membrane requiring energy
  7. 13. membrane protein that changes shape to transport substances
  8. 15. state where concentrations are equal