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