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ICSE Nervous System Notes 2018 : Biology (St. Xaviers School, Belguma, Purulia)

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Antareep Maji
St. Xavier's School, Belguma, Purulia
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Name________________________________Block_____Date______________________ Ch 7 The Nervous System Notes Lisa Peck I. Organization of the Nervous System (pp 222-224) Nervous system- the master controlling and communicating system of the body 3 functions: 1. sensory receptors to monitor changes occurring inside & outside body stimuli- changes sensory input- gathered information 2. processes and interprets the sensory input integration- nervous system makes decisions about what should be done 3. effects a response by activating muscles or glands (effectors) via motor output Regulating and Maintaining Homeostasis nervous system - fast-acting control via electrical impulses endocrine system- slow-acting control via hormones release into the blood Structural Classification (p 223) 2 subdivisions: Central Nervous System Peripheral Nervous System 1. Central Nervous System (CNS) consists of: brain spinal cord functions: integrating center.........interpret incoming sensory information command center..........issue instructions based on past experience & current conditions 2. Peripheral Nervous System (PNS) consists of: nerves 2 types: cranial nerves- carry impulses to and from the brain spinal nerves- carry impulses to and from the spinal cord ganglia- groups of nerve cell bodies function: communication lines, linking all parts of the body

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