BIO 309D S08 Lec7 - The Nervous System The nervous system...

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The Nervous System
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The nervous system integrates
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The Nervous System Central Nervous System (CNS) receives and processes information; initiates action Brain receives and processes sensory information; initiates responses; stores memories; generates thoughts and emotions Spinal Cord conducts signals to and from the brain; controls reflex activities Perifpheral Nervous System (PNS) transmits signals between the CNS and the rest of the body Motor Neurons carry signals from the CNS that control the activities of muscles and glands Sensory Neurons carry signals to the CNS from sensory organs Somatic Nervous System controls voluntary movements by activating skeletal muscles Autonomic Nervous System controls involuntary responses by influencing organs, glands, and smooth muscle Sympathetic Division prepares the body for stressful or energetic activity; “fight or flight” Parasympathetic Division dominates during times of “rest and rumination”; directs maintenance activities This is a diff organization of the Nervous system from the book. USE THIS ONE!
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The Central Nervous System The brain and spinal cord Integrates incoming information and coordinates all voluntary and involuntary responses
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The CNS is well protected Bone, membranes, and fluid protect CNS Meninges Cerebrospinal fluid Blood-brain barrier
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CNS protection - bone Bone Skull encases brain Vertebral column encloses spinal cord Protect from physical trauma
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CNS protection: Meninges Three connective tissue membrane layers Dura mater, arachnoid mater, pia mater (don’t need to know these for test - just for future knowledge) Stabilize and protect Meningitis: inflammation of meninges - typically from bacterial infection of the meninges
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This note was uploaded on 03/25/2008 for the course BIO 309D taught by Professor Jessicawandelt during the Spring '08 term at University of Texas at Austin.

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BIO 309D S08 Lec7 - The Nervous System The nervous system...

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