Scientific Terms

3. Extension of nerve cell which receives impulses
6. Connects the eye to the brain. Carries impulses found by the retina
10. Ability for body to maintain stable internal body environment despite a change of external conditions
13. A long string like part of a nerve which impulses are conducted from to other cells
14. Chemicals released by neurons to activate muscles or gland cells, allowing impulses to be passed from one cell to another
15. Nerve cells in the nervous system that convert external responses from the environment and turn them into electrical impulses
16. Space between two nerve cells
17. Input to one's senses which causes a response
18. Receptors which respond to light. Found in the eye

1. Organ or cell that acts in response to a stimulus
2. Receptors which respond to movement of the body. Found in the skin and ear
4. When the eye focuses an image far away in front of the retina
5. Receptors which respond to temperature. Found in the skin
7. Neurons which transmit impulses between other neurons, especially as part of a reflex arc
8. Receptors which respond to chemicals. Found in the tongue and nose
9. When the eye focuses an image nearby behind the retina
11. Neurons which facilitate muscle contraption. Originate in spinal cord
12. Signal transmitted along nerve fibre