Across
- 2. Twins from two eggs, share about 50% of DNA.
- 5. Focuses light onto retina.
- 7. Support, protect, and feed neurons.
- 8. Organ that controls thoughts, emotions, and body functions.
- 10. Hormone that regulates sleep.
- 11. Affects movement, pleasure, reward, and attention.
- 13. Long fiber that sends messages away from the cell body.
- 14. Traits and abilities passed down through genes.
- 16. nd of axon releases neurotransmitters.
- 18. Branches that receive incoming messages.
Down
- 1. carries signals from CNS to muscles.
- 3. Hormone that decreases hunger.
- 4. Nerve cell that sends and receives signals.
- 6. Pathway for signals between brain and body.
- 9. Twins from one egg, share 100% of DNA.
- 12. Natural painkillers that boost pleasure.
- 15. Hormone that increases hunger.
- 17. Minimum stimulation needed for firing.