neurons and nervous/endocrine system

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Across
  1. 2. messengers that are carried through the blood to organs and tissues
  2. 4. electrical signals used for communication through cell stimulation
  3. 7. when a neuron tries to restore its charge
  4. 8. secrete hormones throughout bodies
  5. 12. travels to connect the central nervous system to muscles and organs efferently
  6. 13. controls the body's skeletal muscles
  7. 15. helps the body cope with stresses
  8. 17. a neurotransmitter or mimicked one that stops the removal of neurotransmitters from the synapse
  9. 19. calms the body and conserves energy
  10. 20. in the brain and spinal cord and communicate internally
  11. 21. a chemical messenger that sends messenges between neurons
Down
  1. 1. send signals to stimulate cells
  2. 3. arouses the body and mobilizes energy
  3. 5. regulates the body's metabolism, blood pressure, heart rate, and more bodily functions
  4. 6. send signals to calm cells
  5. 9. connect receptors to central nervous system afferently
  6. 10. produces hormones that control the enocrine's functions
  7. 11. broken down into two systems that deal with connecting the central nervous system
  8. 14. broken down into two systems that deal with both skeletal responses and involuntary functions
  9. 16. chemical of drug that can bind to receptors in order to decrease the neurotransmitter's abilities
  10. 18. regulates the involuntary functions within the body