Chapter 8

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Across
  1. 3. when the comparing two solutions, the solution with the greater concentration of solution
  2. 5. when the concentration of two solutions is the same
  3. 6. fundamental concept of biology that states that all living things are composed of cells.
  4. 7. when comparing two solutions, the solution with the lesser concentrations of solution
  5. 9. specialized structure that performs cellular functions within a eukaryotic cell
  6. 12. the structure that contains the cell's genetic material in the form of DNA
  7. 13. strong, supporting layer around the cell membrane in some cells
  8. 17. unicellular organism that lacks a nucleus
  9. 20. cell organelle consisting of RNA and proteins found throughout the cytoplasm in a cell
  10. 21. internal membrane system found in eukaryotic cells
  11. 24. group of organs that work together to perform a specific function
  12. 25. process of diffusion in which molecules pass across the membrane through cell membrane channels
  13. 29. basic unit of all forms of life
  14. 30. pressure that must be applied to prevent osmotic movement across a selectively permeable membrane
  15. 31. relatively constant internal physical and chemical conditions that organisms maintain
  16. 32. thin flexible barrier that surrounds all cells regulates what enters and leaves the cell
Down
  1. 1. converts the chemical energy stored in food into compounds that are more convenient for the cell to use
  2. 2. group of similar cells that perform a particular function
  3. 4. property of biological membranes that allows some substances to pass across it while others cannot
  4. 8. cell organelle that stores materials such as water salts proteins and carbohydrates
  5. 10. water channel protein in a cell
  6. 11. organelle in cells that modifies, sorts, and packages proteins and other materials for storage
  7. 14. specific protein to whose shape fits that of a specific molecular messenger
  8. 15. process by which particles tend to move from an area where they are more concentrated to an area where they are less concentrated
  9. 16. cell organelle that breaks down lipids carbohydrates and proteins into small molecules
  10. 18. captures the energy from sunlight and converts it into chemical energy
  11. 19. fluid portion of the cell outside the nucleus
  12. 22. gives the cell its shape and internal organization and is involved in movement.
  13. 23. group of tissues that work together to perform closely related functions
  14. 26. flexible double-layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings
  15. 27. organism whose cells contain a nucleus
  16. 28. diffusion of water through a selectively permeable membrane