Across
- 1. chemical messenger carried in the blood
- 3. nerve cell that carries electrical impulses
- 7. process that releases energy from glucose
- 8. organ or tissue that releases substances such as hormones or sweat
- 11. receives and processes information from receptors
- 12. muscle or gland that brings about a response
- 14. regulation of internal conditions to maintain optimum conditions for function
- 16. the action caused by an effector
- 17. movement of water across a partially permeable membrane
Down
- 2. system that uses neurones and electrical impulses
- 4. a change in the environment
- 5. coordination centre involved in blood glucose control
- 6. coordination centre involved in many homeostatic responses
- 9. system that uses hormones to coordinate responses
- 10. sugar needed by cells for respiration
- 13. cell that detects a stimulus
- 15. the best condition for enzyme action or cell function