Unit 2A

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Across
  1. 3. neurotransmitter that promotes sleep and relaxation
  2. 4. gap between neurons
  3. 7. neurotransmitter that regulates sleep, mood, and appetite. Low levels can lead to depression
  4. 10. neuron's cell body
  5. 12. division of nervous system that controls non-voluntary functions
  6. 14. division of the nervous system that returns the body to a calm state after an emergency
Down
  1. 1. part of neuron that sends messages to other neurons, muscles, and glands
  2. 2. excess neurotransmitter is reabsorbed by the neuron that released it
  3. 3. study of variation and heredity in living organisms
  4. 5. division of nervous system that prepares the body for an emergency
  5. 6. protective layer that surrounds the axon
  6. 8. neurotransmitter associated with learning and memory
  7. 9. part of neuron that receives information
  8. 11. neurotransmitter that effects muscle control and happiness
  9. 13. division of nervous system that controls voluntary movement of skeletal muscles