UNIT 2 CROSSWORD

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Across
  1. 2. Stem cells that have had some genes turned off, so they can become only certain types of cells within the body.
  2. 7. Cells that are specialized to attack and engulf pathogens that enter the body.
  3. 11. The turning on and off of genes that allows cells to become specialized.
  4. 12. A phospholipid bilateral structure that surrounds all cells.
  5. 17. Maintaining stable internal conditions
  6. 19. The difference in the concentration of a particular molecule on the two sides of a membrane
  7. 22. Cells that are specialized to contract and cause movement.
  8. 23. A large vacuole, usually found in protists, that is used for regulation of water balance.
Down
  1. 1. Stem cells with the complete genome, still able to become any type of cell within the body.
  2. 3. Cells that are specialized to carry oxygen within the body.
  3. 4. A hormone that helps in the metabolism of carbohydrates and regulates blood glucose levels
  4. 5. A membrane that will allow some things to pass through, but not others. Usually dependent on size of the molecules or solubility.
  5. 6. A chemical solution that helps to maintain a constant pH
  6. 8. Movement of molecules from an area of high concentration to an area of low concentration (down the concentration gradient). A type of passive transport.
  7. 9. Proteins embedded in the plasma membrane that are used for facilitated diffusion and active transport
  8. 10. A cell with many branching projections specialized for transmitting information in the body.
  9. 12. A measure of how acidic or basic a substance is. Based on the number of Hydrogen ions produced when it is dissolved in water.
  10. 13. pump: The process of moving sodium and potassium ions across the cell membrane using active transport. Important in the transmission of nerve impulses.
  11. 14. The fact that certain cells have structures that allow them to carry out their intended function.
  12. 15. movement of materials across the plasma membrane that requires the use of ATP (energy)
  13. 16. Movement of materials across the plasma membrane without the use of ATP (energy)
  14. 18. Male reproductive cells (gametes). They are haploid (n) and have a flagellum to allow for movement.
  15. 20. A hormone that stimulates the breakdown of glycogen to increase blood glucose levels. Antagonist to insulin.
  16. 21. Movement of water molecules from an area of high concentration to an area of low concentration. A form of passive transport.