8th grade ch. 6 sec. 1 nervous system

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8th grade ch. 6 sec. 1 nervous system

  1. 1. Ch. 6 Sec. 1 How the Nervous System Works
  2. 2. Functions of the nervous system:
  3. 3. 1. Receives info.
  4. 4. 2. responds to info. • Stimulus- any change or signal in environment that can make an organism react • Response- what your body does in reaction to stimulus
  5. 5. 3. maintains homeostasis
  6. 6. neuron • nerve cell • carries info. thru. nervous system
  7. 7. carry impulses  cell body carry impulses away from cell body
  8. 8. nerve impulse •message that neuron carries
  9. 9. Path of a nerve impulse
  10. 10. 3 kinds of neurons 1. 3. 2. sensory motor interneuron neuron neuron
  11. 11. 1.sensory neuron •picks up stimuli  nerve impulse
  12. 12. 2. interneuron •carries nerve impulses from neuron neuron
  13. 13. 3. motor neuron •sends impulse to muscle or gland
  14. 14. synapse •junction where 1 neuron can transfer an impulse  another structure (neuron, muscle, gland, etc.)
  15. 15. gap at a synapse = river nerve impulse = General Lee car

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