Across
- 3. an imaging technique used to study the brain to pinpoint injuries and brain deterioration
- 5. a measuring technique used to study brain structure and activity
- 7. the long, think cells of nerve tissue along which messages travel to and from the brain
- 9. the brain and spinal cord
- 13. the expressions of a particular trait in an organism
- 16. descended from ancestors with similar genetics
- 17. the genetic transmission of characteristics from parents to their offspring
- 18. chemical substances that carry messages through the body in blood
- 19. descended from ancestors with dissimilar genetics
- 21. a machine used to record the electrical activity of large portions of the brain
- 22. an imaging technique used to see which brain areas are being activated while performing tasks
- 23. twins who come from two different eggs fertilized by two different sperm
- 24. the part of the peripheral nervous system that controls internal biological functions
- 25. the chemicals released by neurons which determine the rate at which other neurons fire
Down
- 1. twins who come from one fertilized egg, same heredity
- 2. a part of the brains central core, responsible for sensory and motor control and the processing of thinking and language
- 4. the gap that exists between individual nerve cells
- 5. a small part of the brain above the pons that arouses the brain, integrates sensory info, and relays it upward
- 6. a part of the brain located at the rear base of the skull that is involved in the basic processes of life
- 8. the set of genes in an organism
- 10. the different regions into which the cerebral cortex is divided
- 11. nerves that run up and down the length of the back and transmit most messages between the body and brain
- 12. chemical communication system, using hormones, by which messages are sent through the bloodstream
- 13. the center of control of the endocrine system that secretes a large number of hormones
- 14. the basic building blocks of heredity
- 15. the part of the peripheral nervous system that controls voluntary movement of skeletal muscles
- 20. nerves branching beyond the spinal cord into the body