The Nervous System

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Across
  1. 4. triggered when the neuron recieves a chemical signal or stimulus from another cell.
  2. 6. basic units of the nervous system; the human brain contains around 100 billion of them.
  3. 8. respond to chemicals in taste, smell, and internal changes.
  4. 9. respond to tissue damage (pain).
  5. 11. connects the brain and spinal cord to the rest of the body & external environment through nerves.
  6. 12. respond to temperature changes.
Down
  1. 1. respond to the body positions of skeletal muscles, tendons, ligaments, and joints.
  2. 2. includes the brain and spine, controls all voluntary movement.
  3. 3. helps the axon conduct an electrical signal
  4. 5. respond to physical forces in touch, hearing, and pressure.
  5. 7. respond to light.
  6. 10. long tail-like extension