Chapter 8

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