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nervous system
Term | Definition |
---|---|
central nervous system | - brain + spinal cord - integrative and control centers |
peripheral nervous system (PNS) | - cranial nerves + spinal nerves - communication lines btw the cns and rest of body |
sensory (afferent) division | - somatic and visceral sensory nerve fibers - conducts impulses fr. receptors to CNS |
motor (efferent) division | - motor nerve fibers - conducts impulses from the CNS to effectors (muscles + glands) |
somatic nervous system | - somatic (voluntary) motor nerve fibers - conducts impulses fr. the CNS to skeletal muscles |
autonomic nervous system (ANS) | - visceral (involuntary) motor nerve fibers - conducts impulses fr. the CNS to cardiac muscle, smooth muscle, and glands |
sympathetic division | mobilizes body systems during activity |
parasympathetic division | - conserves energy - promotes house keeping functions during rest (flight/freeze/fight) |