Nervous System and Neurons

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Across
  1. 3. The junction or connection point where nerve impulses pass from one neuron to another
  2. 5. Specialized cell that serves as the building block of the nervous system, transmitting signals throughout the body
  3. 6. (Three words no space) Consists of all the nerves and ganglia outside the brain and spinal cord
  4. 7. Long, slender projection of a neuron that conducts electrical impulses away from the cell body
  5. 10. (Three words no space) Division of the PNS that regulates involuntary bodily functions automatically
  6. 13. (Two words no space) The body's communication network consisting of nerves, neurons, and specialized cells
  7. 15. (Three words no space) Branch of the autonomic nervous system responsible for promoting relaxation and restoring a calm state
  8. 16. (Three words no space) Branch of the autonomic nervous system responsible for activating the body's fight or flight response
Down
  1. 1. Chemical messengers that neurons use to transmit signals across a synapse
  2. 2. (Two words no space) A protective, fatty-protein layer wrapping around the axon to speed up signal transmission
  3. 4. (Three words no space) Consists of the brain and spinal cord, serving as the command center of the body
  4. 8. Contains the cell's genetic material (DNA) and directs overall cellular activity
  5. 9. (Three words no space)Division of the PNS responsible for controlling voluntary movements and relaying sensory information
  6. 11. Branch-like extensions of a neuron that act as receiving antennas to pick up signals
  7. 12. (Two words no space) Extensions at the far end of a neuron's axon that pass electrical signals on to other cells
  8. 14. Body The central part of a nerve cell that contains the nucleus and controls metabolic activities