Tuesday, January 31, 2012

2.85 reflex arc

http://www.bbc.co.uk/schools/gcsebitesize/science/aqa_pre_2011/human/thenervoussystemrev3.shtml

This is what happens:
  1. receptor detects a stimulus - change in the environment
  2. sensory neurone sends signal to relay neurone
  3. motor neurone sends signal to effector
  4. effector produces a response



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

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



2.83 CNS