Across
- 3. are electrical impulses that are fast
- 7. they slacken when an object is near
- 8. the process to bring an equilibrium in the body
- 9. body controlling body temperature
- 11. is a type of tropism related to light
- 13. changes in organism external environment
- 14. muscles in the iris that contract in dim light
- 15. receptor cells that detects colour in the eye
Down
- 1. a chemical signal that takes time to reach the target
- 2. receptor cells that detects light levels in the eye
- 4. dilates when light is dim
- 5. diffuse across the synapse to send electrical signals to the brain
- 6. released by the pituitary gland is important in both male and female reproductive system
- 10. plant responds to gravity
- 12. released by the pancreas to control blood level glucose