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12 Cards in this Set
- Front
- Back
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Functions of the nervous system |
• Sensory input • Intergration • Motor output |
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Sensory input - gathering information |
• to monitor changes occuring inside and outside the body • changes = stimuli |
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Intergration |
• to process and interpret sensory input and decide if action is needed |
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Motor output |
• a response to intergrated stimuli • the response activates muscle or glands |
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Divisions of the nervous system |
• Central nervous system ( CNS) • Peripheral nervous system (PNS) |
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Central nervous system |
•brain •spinal cord •functions • Intergration; command center • interpret incoming sensory information • issues outgoing instructions |
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Peripheral nervous system |
• nerves extending from the brain and spinal cord •spinal nerves • cranial nerves •functions • serve as communication lines among sensory organs, the brain and the spinal cord, and glands or muscles |
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Fucntional classification of the peripheral nervous system |
•sensory (afferent) division •motor (efferent) division |
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Sensory (afferent) division |
Nerve fibers that carry information to the central nervous system |
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Motor (efferent) division |
Nerve fibers that carry impulses away from the central nervous system |
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Functional classification of the peripheral nervous system |
Motor (efferent ) division • two subdivisions • somatic nervous system = voluntary • consciously controls skeletal muscles • autonomic nervous system • automatically controls smooth and cardiac muscles and glands • further divided into the sympathetic and parasympathetic nervous systems |
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Nervous system - supportive cells |
• types of glial cells •CNS •astrocytes - maintain external environment •ependymal cells - forms the choroid plexus and blood vessels • microglia- removes debri • oligodendrocytes - produce myelin •PNS •satellite cells - supports cells • neurolemmocytes (aka schwann cells) - produce myelin |
