Bio1201-Lab13 - The Nervous System !"#...

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Unformatted text preview: The Nervous System !"# %&%()*+ %,-./"01 &% 2*3*0* 4#5*6 789 :;#5*<=":>:?=8@=A0>@?BA C%D(&E(FGEG Organization of the Nervous System All animals except sponges have a NS. What distinguishes NS of different animal groups is how neurons are organized into circuits. IN VERTEBRATES: Central Nervous System (CNS) highest concentration of neurons (brain & spinal cord) Peripheral Nervous System nerves and neurons outside the CNS. Two divisions: Somatic (voluntary), autonomic (involuntary) Neurons cells of the N.S. that relay electrochemical impulses Ganglion ( pl. ganglia ) a cluster of neurons Sensory neurons relay impulses TO the CNS via afferent nerves Motor neurons relay impulses AWAY from the CNS via efferent nerves effectors can be muscle, gland, or other neurons Interneurons cells of the CNS, b/w the sensory and motor neurons, that process and integrate incoming signals and initiate outgoing impulses Organization of the Nervous System Nervous systems process information in three stages: sensory input, integration, and motor output Information Processing...
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Bio1201-Lab13 - The Nervous System !"#...

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