Homeostasis and Body Systems

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Across
  1. 4. receives chemical signals from outside the cell
  2. 6. a large protein which speeds up chemical reactions
  3. 8. the process of taking in substances
  4. 10. the structural and functional unit of the kidney
  5. 11. the ability of an organism or cell to maintain internal equilibrium
  6. 12. carries a signal from one nerve cell to another
  7. 14. a sac in the lungs where the exchange of oxygen and carbon dioxide takes place
  8. 15. the process of breaking down food
  9. 18. a nerve cell
  10. 19. a detectable change in the internal or external environment.
  11. 20. absorbs nutrients in the food
Down
  1. 1. is made up cells that work together to perform a specific function
  2. 2. a natural substance that is produced in the body and that influences the way the body grows or develops
  3. 3. a loop system in which the system responds to positive feedback or negative feedback
  4. 5. is a molecule that is acted upon by an enzyme
  5. 7. the narrow, winding, upper part of the intestine where digestion is completed and nutrients are absorbed by the blood
  6. 9. is made up of tissues to perform a specific function
  7. 13. a reaction to stimulus
  8. 16. a hormone produced in the pancreas that regulates the amount of glucose in the blood
  9. 17. organs whose function is to remove carbon dioxide from the blood and provide it with oxygen