term1 Definition1term2 Definition2term3 Definition3
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nervous system
the master controlling and communicating system of the body
1. sensory input
2. integration
3. motor output
3 overlapping functions of the nervous system
sensory input
the information gathered by the millions of sensory receptors of the nervous system, monitoring changes inside and outside of the body
integration
the nervous system processes and interprets sensory input and decides what should be done at each moment
motor output
the nervous system activates effector organs (the muscles and glands) to cause a response
1. central nervous system (CNS)
2. peripheral nervous system (PNS)
2 principal parts of the nervous system
central nervous system (CNS)
the integrating and control center of the nervous system; the brain and spinal cord
peripheral nervous system (PNS)
the part of the nervous system outside the CNS; consists mainly of nerves that extend from the brain and spinal cord
1. sensory division (afferent)
2. motor division (efferent)
2 functional subdivisions of the PNS
sensory division (afferent division)
PNS subdivision consisting of nerve fibers (axons) carrying impulses to the CNS from sensory receptors throughout the body
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