Obtaining Energy

2. A source of nourishment, such as food, that can be metabolized by an organism to give energy and build tissue
4. When excess ATP and glucose are present, what molecule does the liver converts them into?
5. Through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's ____
7. A plastid that contains chlorophyll and in which photosynthesis takes place
11. What is the first step in cellular respiration?
13. Two sources of energy-rich chemical bonds
14. Cell respiration is the controlled release of energy from __________ __________ in cells to form ATP
15. The primary source of energy for everybody to function
18. Powerhouses of the cells
19. ___________ _________ are those that cannot be created by an animal’s metabolism and need to be obtained from the diet

1. What is the second step in cellular respiration?
3. Where energy is stored in a plant
5. Gives us the energy we need to get through the day, and so we are able to exert ourselves
6. All of the chemical reactions that take place in the human body
8. Catabolic reactions break down large molecules; ________ reactions build large molecules
9. Occurs only in plants, algae, and some bacteria
10. A source of energy for humans, taken through the mouth
12. When the stomach digests food, what in the food breaks down into glucose?
16. Destructive metabolism, usually including the release of energy and breakdown of materials
17. How many steps are in cellular respiration?