Unit Two Vocab

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Across
  1. 2. axon is so negative it will not reach action potential.at rest
  2. 5. controls voluntary movements of skeletal muscles
  3. 6. neuron tries to restore charge by pumping out positive ions and bringing in negative ones
  4. 7. made up of brain and spinal cord
  5. 10. neuron within brain and spinal cord that communicate internally
  6. 12. life support center of neuron
  7. 14. gap between axon terminals and dendrites
  8. 17. part of neuron that passes messages away from cell body to neurons,muscles, or glands
  9. 18. chemical messengers secreted into blood to organs and tissues
  10. 19. slightly negative charge inside neuron acting as a store of potential energy
  11. 20. carry outgoing info from brain and spinal cord to muscles and glands
  12. 22. nerve cells.basic build block of nervous system
  13. 23. part of neuron that receives messages from other cells
Down
  1. 1. carry information from sensory receptors to brain and spinal cord
  2. 3. neural impulses either fire and generate action potential or doesnt do anything
  3. 4. autoimmune disease attacking myelin sheath
  4. 8. psychology linking biology and behavior
  5. 9. sends signals to calm cell and not fire action potential
  6. 11. fatty covering of axon that speeds up neural impulses
  7. 13. sends signals to excite cell and fire action potential
  8. 15. controls selfregulated action of internal organs and glands
  9. 16. determines if a stimulus is strong enough to warrant action
  10. 21. based of movements of ions between inside and outside of neuron