Chapter 6

4. a part of the brain located at the rear of the skull that is involved in the basic processes of life
5. the part of the peripheral nervous system that controls voluntary movement of skeletal muscles
6. nerves branching out from the spinal cord
9. the long thin cells of nerve tissue along which messages travel to and from the brain
10. the part of the peripheral nervous system that controls internal biological functions
13. chemical substances that carry messages through the body in blood
14. a part of the brain that covers the central core
15. twins who come from one fertilized egg; twins having the same heredity
16. an imaging techique used to study the brain to pinpoint injuries and brain deterioration
17. an imaging technique used to study brain structure and activity
22. the center of control of the endocrine system that secretes a large number of hormones
23. the genetic transmission of characteristics from parents to their offspring

1. the chemicals released by neurons which determines the rate at which other neurons fire
2. an imaging technique used to see which brain areas are being activated while performing tasks
3. the gap that occurs between individual nerve cells
7. a machine used to record the electrical activity of large portions of the brain
8. twins who come from two different eggs and two different sperms
11. the different regions into which the cerebral cortex is divided
12. brain and spinal cord
18. a chemical communication system, using hormones by which messages are sent through the bloodstream
19. a small part of the brain above the pons that integrates sensory information and relays it upward
20. the basic building blocks of heredity
21. nerves that run down the length of the back and transmit most messages between the body and the brain