decribe how the nervous system coordinate responds to stimuli. use the following word in your answer:effector,receptor,brain,centarl nervous system

  • 0 votes

b3 biology help ... OCR 21ST CENTURY

Posted Mon 31st December, 2012 @ 18:30 by SUSON
Edited by SUSON on Wed 2nd January, 2013 @ 16:09

2 Answers

  • 1 vote

basically, 

  • the brain is part of the central nervous system to initate a responce in the body. 
  • Sensory receptors (i.e on the skin/temp change) detect change in the outside envirnment, the stimuli
  • Sensory receptors send an electrical impulse from the receptors to the effectors
  • The effectors will indiate a responce. i.e if the outside temp is cold, the body will start to shiver to reverse the change. 

hope this helps :)

Answered Wed 2nd January, 2013 @ 23:41 by Ruby
  • 1 vote

This i show I learnt it;

1) A receptor (e.g. skin) detects a stimuli (e.g a sharp pin).
2) A sensory neurone transmits an electrical impulse across a synapse, impulses can't jump a synapse so they chemically diffuse across the gap, to central nervous system (spinal chord). 
3) A relay neurone transmits the impulse on, to a motor neurone across a synapse.
4) A motor neurone is stimulated, the mipulse is then sent on to the effector (e.g. Muscle)
5) Action is taken (e.g. The muscle contracts and moves hand away from pin) 

Hope this is helpful! :)

Answered Thu 3rd January, 2013 @ 11:24 by :) PurpleJaguar (: - Team GR