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MT Ch. 9
Essentials of Medical Terminology - Ch. 9
Question | Answer |
---|---|
2 parts to the nervous system | central nervous systems (CNS) & peripheral nervous system (PNS) |
CNS | consists spinal cord (body info superhighway) & the brain (information-processing center |
PNS | consists of sensory & motor nerves |
neurons | cells of the nerves |
sensory neurons | detect external & internal environmental influences and carry sensory impulses about those influences to the brain |
motor impulses | motor neurons carry messages from the brain to various part of the body |
nervous system | has sensory, integrative, & motor functions |
sensory function | work of sensory neurons |
integrative function | analytical process is very complex |
motor function | takes over when the brain has decided that a response is needed |
brain receives a sensory impulse | det. what sort of reaction is needed |
motor impulses | is sent thru the motor neurons to the skeletal muscles, or to an organ (heart), or to a gland |
nervous tissue consists | neurons & neuroglia |