Nervous System Vocabulary

3. nervous system branch of the nervous system that controls involuntary body functions
5. nerves sensory transmitters that send impulses from receptors in the skin, muscles, and joints to the central nervous system
7. sheath the fatty bands of insulation surrounding axon fibers
8. cells glial cells that serve as cushioning support cells within the PNS
12. cells glial cells that form a protective covering around the spinal cord and central cavities within the brain
14. cells glial cells that wrap around the axons of some neurons in the PNS, providing them with a myelin sheath that speeds up their rate of transmission
15. nervous system (PNS) all parts of the nervous system external to the brain and spinal cord
18. glial cells that link neurons to capillaries and control the chemical environment to protect the neurons from any harmful substances in the blood
19. the processes through which the CNS receives and processes sensory input from the PNS and coordinates outgoing motor input

1. glial cells that wrap around nerve fibers and produce a fatty insulating material called myelin to insulate some neurons
2. chemicals that act as messengers between an axon of one neuron and a dendrite on another, or between an axon and a muscle fiber
4. nervous system (CNS) the brain and spinal cord
6. nerves motor transmitters that carry impulses from the central nervous system out to the muscles and glands
9. nervous system branch of the nervous system that stimulates the skeletal muscles
10. the intersection between a neuron and another neuron, a muscle, a gland, or a sensory receptor
11. non-neural tissue that forms the interstitial or supporting elements of the CNS; also known as glial cells
13. branches of a neuron that collect stimuli and transport them to the cell body
16. neurons that form bridges to transmit nerve impulses between afferent and efferent neurons
17. glial cells that absorb and dispose of dead cells and bacteria