Across
- 3. The pressure in the arteries when the heart contracts
- 4. The physical expression of a gene
- 6. Drug found in tobacco smoke
- 8. Chemicals that kill or prevent the growth of bacteria
- 11. Maintaining a constant environment in the body
- 12. Glands or muscles that carry out a response
- 14. Drugs that increase brain activity (e.g. Caffeine)
- 17. Vision where both eyes focus on the same thing
- 20. Hormone that regulates body glucose levels
Down
- 1. Food made up of amino acids used for growth and repair
- 2. White blood cells that produce antibodies
- 5. Proteins found on the surface of cells
- 7. A nerve cell
- 9. A clot within a blood vessel
- 10. The response of a plant to gravity
- 13. Organ that secretes hormones
- 15. Type of characteristic determined by genes
- 16. A parasitic microorganism that causes disease
- 18. A disease caused by bacteria
- 19. Different version of a gene