Human Body Nervous System

7. A portion of a nerve cell that carries nerve impulses away from the cell body
9. A branching figure resembling a tree
16. The part of the nervous system that slows the heart, dilates blood vessels, decreases pupil size, increases digestive juices, and relaxes muscles in the gastrointestinal tract
18. The place where neurons connect
21. A component of the peripheral nervous system that regulates involuntary physiologic processes
22. A long, tube-like band of tissue, It connects your brain to your lower back

1. Any of the bony or cartilaginous segments that make up the spinal column
2. an electrical signal that travels along a nerve fiber in response to a stimulus
3. The nervous system outside the brain and spinal cord.
4. The part of the nervous system that increases heart rate, blood pressure, breathing rate, and pupil size
5. The ends of axons which transmit messages to other cells
6. The structure that connects the cerebrum of the brain to the spinal cord and cerebellum
8. A chemical substance that is released at the end of a nerve fiber
10. A whitish fiber or bundle of fibers that transmits impulses of sensation to the brain or spinal cord
11. The change in electrical potential associated with the passage of an impulse along the membrane of a muscle cell or nerve cell.
12. The organ inside the head that controls all body functions of a human being
13. The central nervous system is the brain and spinal cord
14. The largest part of the brain
15. A transport pump that trades sodium ions for potassium ions
17. The electrical potential of a neuron to its surroundings when not stimulated
19. A major structure of the hindbrain that is located near the brainstem
20. An atom or a group of atoms that has an electric charge