2.84 understand that stimulation of receptors in the sense organs sends electrical impulses along nerves into and out of the central nervous system, resulting in rapid responses

- The receptors in the sense organs, when stimulated create electric impulses along the nerves.
- This moves into the nervous system and out to create a rapid response.
 e.g. Light enters the eyes, this creates an electrical impulse along the nerves. They move in and out of the nervous system, to the effector and create a response such as blinking.