Psychology Chapter 6 Vocab

5. the expression of a particular trait in an organism
7. twins who comes from two different eggs fertilized by two different sperm
11. a chemical communication system, using hormones, by which messages are sent through the bloodstream
13. descended from ancestors with dissimilar genetics
15. the set of genes in an organism
16. twins who come from one fertilized egg; twins having the same heredity
17. _____ nervous system - nerves branching beyond the spinal cord into the body
18. the gap that exists between individual nerve cells
20. an imaging technique used to study the brain to pinpoint injuries and brain deterioration
23. nerves that run up and down the length of the back and transmit most messages between the body and brain
25. the genetic transmission of characteristics from parents to their offspring

1. a part of the brain that covers the brain's central core, responsible for sensory and motor control and the processing of thinking and language
2. the basic building blocks of heredity
3. chemical substances that carry messages through the body in blood
4. the chemicals released by neurons, which determine the rate at which other neurons fire
6. an imaging technique used to see which brain areas are being activated while performing tasks
8. _____ nervous system - the part of the peripheral nervous system that controls internal biological functions
9. a maching used to record the electrical activity of large portions of the brain
10. a part of the brain located at the rear base of the skull that is involved in the basic processes of life
12. a small part of the brain above the pons that arouses the brain, integrates sensory info, and relays it upward
14. the long, thin cell of nerve tissue along which messages travel to and from the brain
19. the center of control of the endocrine system that secretes a large number of hormones
21. _____ nervous system - the brain and spinal cord
22. the different regions into which the cerebral cortex is divided
23. _____ nervous system - the part of the peripheral nervous system that controls voluntary movement of skeletal muscles
24. a measuring technique used to study brain structure and activity