Nervous System

The nervous system is made up of the CNS (Central Nervous System) and the peripheral nervous system. The nervous system is a means of gathering information about, and responding to, changes in the environment either inside or outside the body. The nervous system is made up of receptors which respond to stimuli and pass on information about them.

The central nervous system (CNS) co-ordinates the information and responds by sending signals to the effectors, which bring about a response.

This video explains more about the Nervous system.

Electrical signals are carried around the body along neurones. See the example below:

  • you walk into a bright room Stimulus > receptor > CNS > effector > response
  • So… Light intensity > eye > brain > eye muscles receive information > eye muscles make pupil smaller

See the resources below for more information

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