Across
- 3. A type of transport that requires energy to move substances.
- 4. The basic unit of life.
- 6. The powerhouse of the cell responsible for ATP production.
- 9. The process of breaking down food into smaller molecules.
- 11. Feedback, A regulatory mechanism that counters changes in the body.
- 12. Feedback, A regulatory mechanism that amplifies changes in the body.
- 13. A simple sugar used for energy by cells.
- 17. The removal of waste products from the body.
- 19. Transport, The movement of molecules from low to high concentration.
- 20. A group of similar cells working together.
- 22. The breakdown of glucose for energy in the presence of oxygen.
- 23. tiny air sacs in the lungs where gas exchange occurs
- 24. The system responsible for transporting oxygen and nutrients.
Down
- 1. A organism with simple organization (one cell).
- 2. Reactions occurring within an organism.
- 5. exchange, the process by which oxygen is taken in and carbon dioxide is released.
- 7. The control center of the cell containing genetic information.
- 8. The joining/fusing of molecules from simpler components.
- 10. Process that moves substances from high to low concentration.
- 14. Biological catalysts that speed up reactions.
- 15. The maintenance of a stable internal environment.
- 16. Chemical compounds containing carbon and hydrogen.
- 18. An organism with complex organization (multiple cells) .
- 21. Essential functions, including nutrition, digestion, and excretion.