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Lecture 5: cognitive functioning and decline: [sorry for the bad formatting] Primary regulator, provides communication between all of the systems and proved homoeostasis. The nervous system is what permits us to voluntarily nmove and it underlies all of our cognitive processes. Components of the n. s: brain, spinal cord, and nerves. Within our peripheral nervous system we have 2 key systems: Participate in the organism"s relationship with its external environment send information to the brain from the body"s various sensory detectors. The automatic nervous system: more involved in regulating vital internal functions help maintain internal equilibrium by coordinating such activities as digestion, respiration, blood circulation, excretion, and the secretion of hormones. Responsible for monitoring and controlling blood pressure and digestion, respiration, and others as well. Is further divided into the sympathetic & parasympathetic nervous system. 18 inches long, made up of vertebrae, its flexible but some of the vertebrae on the bottom become fused together on their own.

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