Metabolism Review

6. The tiny structures inside cells where energy is released.
7. A set of interacting parts forming a complex whole
12. The process cells use to release energy is called ______ respiration.
16. A problem with a _____ system can result in fewer molecules getting to the body's cells.
17. The _______ system breaks down food into smaller molecules that can fit into cells.
18. A medical condition where the body does not make enough insulin, so glucose is prevented from getting to cells.
20. Some athletes may enhance their performance in races from using blood ______.
21. In order to release ______ cells need glucose and oxygen molecules.
22. The _______ system brings in oxygen molecules from the air.

1. A medical condition where the airway closes up and oxygen cannot enter the lungs.
2. Cells can grow and repair themselves by combining amino acid molecules into ______.
3. In a functioning human body, body systems work together to deliver ____, oxygen, and amino acid molecules to the cells in the body.
4. Inside the cell, the _____ that make up glucose and oxygen are rearranged to make different molecules.
5. The ________ system transports molecules to every cell in the body.
8. A group of atoms joined together in a particular way.
9. The body's use of molecules for energy and growth
10. A ________ human body has molecules from food and molecules from air in its cells.
11. Cells can only use molecules that are _____ enough to enter a cell.
13. The building blocks of protein
14. A medical condition where there are fewer than normal red blood cells, so less oxygen is delivered to cells.
15. A molecule organisms get from air and use to release energy
19. The ability to make things move or change