nervous system organization

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Last updated 1:44 AM on 9/14/26
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10 Terms

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CNS (Central NS)

Brain and spinal cord, integrative and control centers

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PNS (Peripheral NS)

Cranial nerves, communication between CNS and the body

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sensory (AFFERENT=TOWARD) division

Somatic and visceral sensory fibers, conducts impulses from receptor to CNS

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motor (EFFERENT=AWAY) division

conducts impulses from CNS to efectors (muscles and body)

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somatic

voluntary (ex:Deciding to kick a soccer ball.)

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Visceral

involuntary (ex: stomach churning)

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Somatic NS

somatic motor nerve fibers, conducts impulses from CNS to skeletal muscles

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Autonomic NS (ANS)

visceral motor nerves, conducts impulses from CNS to cardiac muscle, smooth muscle, and glands

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Sympathetic

mobolizes body system during activity, fight or flight

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Parasympathetic

conserves energy, promotes housekeeping functions, rest and digest