2.87 understand that the central nervous system consists of the brain and spinal cord and is linked to sense organs by nerves

Central Nervous System (CNS):

• Centre of nervous system
• Receptors in sense organs (such as eyes, skin) send electrical impulses through nerves to CNS.
• Decides a response for a stimulus.
• The response is created for effectors to carry out the response 

Detailed Process:

1. CNS decides the response for a stimulus, which is detected by the receptor (receptor detects the stimulus)
2. Sensory Neurons will carry electrical impulses to CNS to be passed onto effector by Motor Neurons.
3. Effector carries out the response.