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

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