chapter 2:Bio

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The nervous systen

  • sense organs detect stimuli
  • stimulus = change in environment
  • CNS = where all info is sent
  • Neurones tansmit info
  • sent to the effectors
  • sensory neurones = nerve cells cary signals- electrical impulses from receptors in sense organs to the CNS
  • Relay neuron = nerve cells carry signals from sensory neuron to motor neuron
  • Motar neuron = nerve cells carry signals fronm CNS to effector muscles/glands
  • Effectors = muscles/glands- respond differently- musles contract in response to a nervous impulse  > glands secret hormones
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