Biology B1

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