Biology Extra Credit Crossword Puzzle

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Across
  1. 3. when the product of a reaction leads to an increase in that reaction
  2. 4. a property of molecules that do not mix with water.
  3. 7. they allow the entry of only a few substances
  4. 8. when concentration of two solutions is equal
  5. 9. molecules that can interact with water.
  6. 10. a solution with higher osmotic pressure than another solution.
  7. 15. the chemical processes that occur within a living organism in order to maintain life
  8. 17. a chemical or physical change in the environment that triggers some sort of the behavioral change in a living organism.
  9. 18. the movement of materials across the cell membrane without using cellular energy
  10. 20. thin flex able barrier that controls what goes in and out of a cell
Down
  1. 1. the net movement of molecules from an area of greater concentration to an area of lesser concentration.
  2. 2. normal biological response in which the effects of a reaction slow or stop that reaction
  3. 5. keeping the balance
  4. 6. process of diffusion in which molecules pass across the membrane through a cell membrane channel
  5. 11. the movement of materials against a concentration differance
  6. 12. proteins or glycoproteins that receive signals by binding to signaling molecules
  7. 13. diffusion of water through a selectively permeable membrane
  8. 14. a solution containing a lower amount of solute in comparison to the solute concentration in other solutions, across a semipermeable membrane
  9. 16. the behavior that is manifested by a living organism which is the result of an external or internal stimulus
  10. 19. a part of the body which can respond to a stimulus according to the instructions sent from the nervous system