Across
- 2. Part of the brain responsible for the autonomic nervous system.
- 5. Valves between ventricles and arteries.
- 6. The process of oxygen being picked up by haemoglobin.
- 7. Neurotransmitter responsible for increasing heart rate.
- 8. Branch of nervous system associated with "rest and digest" responses.
- 11. The only blood vessel that can control the width of its lumen.
- 12. Receptor responsible for detecting blood pH changes.
- 14. Quaternary protein responsible for carrying oxygen.
- 16. Stretch receptor responsible for detecting blood pressure.
- 17. The effect of carbon dioxide on the oxygen dissociation curve. (2)
- 18. Neurotransmitter responsible for reducing heart rate.
- 19. Number of oxygen molecules that can be carried by each haemoglobin molecules.
- 20. A smaller vein.
- 21. Blood vessels that form networks that deliver oxygen and nutrients to respiring cells.
Down
- 1. The process of oxygen being delivered to respiring cells by haemoglobin.
- 3. Branch of the nervous system associated with "fight or flight" responses.
- 4. Small holes in capillary walls that allow substances in an out.
- 9. Valve between the atria and ventricles.
- 10. The ballooning of a blood vessel.
- 11. Blood vessels that carry blood under high pressure.
- 13. Formation of a blood clot.
- 15. How strongly haemoglobin is attracted to oxygen.
- 20. Blood vessels containing valves.