The Nervous System

4. connects the central nervous system to the organs and limbs.
6. is the main functional unit of the nervous system that helps a person react to a stimulus.
7. the nerves that carry motor and sensory signals between the spinal cord and the body.
10. it maintains body functions and restores the body to normal or relaxed mode.
12. cylindrical bundles of fibers that start at the brain and central cord and branch out to every other part of the body
15. send signals to other cells through thin fibers called axons
18. an organ located within the skull that functions as organizer and distributor of information for the body
19. a combination of an electrical charge and a chemical reaction.
20. large, upper part of the brain that controls activity and thought.

1. it is activated when the body is in a dynamic role or stress
2. has a cell body containing the nucleus.
3. carry impulses away from the cell body.
5. the nerve fibers that carry information into and out of the brain stem
8. the part that connects the brain to the spinal cord and controls automatic functions such as breathing, digestion, heart rate, and blood pressure.
9. a complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body
11. this serves as a channel for signals between the brain and the rest of the body, and controls simple musculoskeletal reflexes without input from the brain.
13. the part under the cerebrum that controls posture, balance, and coordination.
14. this system is associated with the voluntary control of body movements
16. carry impulses towards the cell body.
17. this system is associated with the involuntary control of body movements