Nervous system

5. changes in the environment that can be detected by organisms
7. a group of neurones joined together (like an electrical cable containing many wires)
9. an electrical signal that passes rapidly along an axon
10. a neurone that transmits electrical impulses from the central nervous system to an effector
11. a means of automatically and rapidly integrating and coordinating stimuli with the responses of effectors
13. cells or groups of cells that detect stimuli
14. short fibres of cytoplasm in a neurone
15. the nerves outside of the brain and spinal cord

1. ensuring that the actions of different parts of the body work together
2. a neurone that transmits electrical impulses within the central nervous system
3. the brain and spinal cord
4. a series of neurones (sensory, relay and motor) that transmit electrical impulses from a receptor to an effector
6. a neurone that transmits electrical impulses from a receptor to the central nervous system
8. a cell that is specialised for conducting electrical impulses rapidly
12. parts of the body that respond to a stimulus; muscles and glands are effectors
16. a long, thin fibre of cytoplasm that extends from the cell body of a neurone