Across
- 3. part of the brain where the spinal cord enters the skull.
- 7. the chemical store of glucose in the liver and muscles.
- 13. all the endocrine glands of the body.
- 14. the lower half of the brain stem.
- 16. the part of the neurone that contains the nucleus.
- 17. a hormone produced in the adrenal glands.
- 18. all the chemical reactions occurring in the cells.
- 20. able to maintain a constant body temperature.
Down
- 1. chemical substances that act as messengers in the body.
- 2. the space between two neurones.
- 4. the cells on which a hormone acts.
- 5. special cells that detect stimuli.
- 6. glands that produce hormones.
- 8. the nerve pathway operating in a reflex action.
- 9. an organic catalyst.
- 10. the organelle where proteins are manufactured.
- 11. the common name for the hormone epinephrine.
- 12. the electrical message carried by a nerve cell.
- 15. a nerve cell.
- 19. a nerve fibre that sends nerve impulse away from the cell body.