How Neurons Communicate

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Across
  1. 2. When a cell becomes more positive or less negative.
  2. 4. The final end of the nerve cell that releases the electrical impulse.
  3. 6. A small electrical pulse by which neurons communicate.
  4. 7. The structure that maintains the membrane gradient. Hint: The sodium potassium _______.
  5. 8. The type of ion that is more abundant inside the cell.
  6. 11. The tree-like extension of the neuron cell that receives the message.
Down
  1. 1. The chemical released to communicate with other neurons.
  2. 3. What is the symbol for sodium?
  3. 4. The long thread-like part of the neuron that the message is sent down.
  4. 5. The outer layer of a cell that allows particles in and out of the cell.
  5. 9. A charged particle.
  6. 10. A tiny cell of the nervous system.