Across
- 3. a nerve cell
- 5. part of the brain where the spinal cord enters the skull
- 9. the chemical store of glucose in the liver and muscles
- 13. glands that produce hormones
- 15. part of the brain that is responsible for coordination and balance
- 16. a nerve fibre that sends nerve impulses away from the cell body
- 17. the cells on which a hormone acts
- 19. an organism that causes disease
- 20. chemical substances that act as messengers in the body
- 21. the process of maintaining a constant internal environment
- 23. a bacterial infection caused by Clostridium tetani
- 25. the part of the that contains the nucleus
- 27. a substance that kills bacteria or prevents the growth of bacteria
- 28. anything that causes our body to stop working properly
- 29. microscopic, single-celled organisms
Down
- 1. branches from the cell body that receives messages from other neurons
- 2. an early antibiotic
- 4. the electrical message carried by a nerve cell
- 6. muscles or glands that put the messages into effect
- 7. the organism a parasite lives in
- 8. automatic actions that protect the body from danger
- 10. the lower half of the brain stem
- 11. the common name for the hormone epinephrine
- 12. able to make the antibodies to a pathogen before it can make you unwell
- 14. very easy to spread
- 18. any factor that stimulates a receptor and brings about a response
- 22. all the chemical reactions occurring in the cells
- 24. a special cell that detects stimuli
- 26. a white blood cell that consumes pathogens and is found in the lymph nodes