Across
- 4. An organic catalyst
- 6. All the chemical reactions occurring in the cells
- 7. glands that produce hormones
- 9. A nerve cell
Down
- 1. the cells on which a hormone acts
- 2. The chemical store of glucose in the liver and muscles
- 3. the common name for the hormone epinephrine
- 5. Chemical substances that act as messengers in the body
- 8. Pumps blood