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