Lecture 7 - Announcements • Reading Chapter 8 Chapter 9 pages 153-55 • Homework#3 • Extra Credit due Wednesday • Presentation The Nervous

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Unformatted text preview: Announcements • Reading: Chapter 8, Chapter 9 pages 153-55 • Homework #3 • Extra Credit due Wednesday • Presentation The Nervous System Outline • Synaptic transmission • Central Nervous system • Brain structure and function 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 Efferent Afferent The Central Nervous System • The brain and spinal cord • Integrates incoming information and coordinates all voluntary and involuntary responses The CNS is well protected • Bone, membranes, and fluid protect CNS • Bone – Skull encases brain – Vertebral column encloses spinal cord – Protect from physical trauma • Meninges – Three connective tissue membrane layers – Dura mater, arachnoid mater, pia mater – Stabilize and protect The CNS is well protected...
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This note was uploaded on 04/07/2008 for the course BIO 309D taught by Professor Jessicawandelt during the Spring '08 term at University of Texas at Austin.

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Lecture 7 - Announcements • Reading Chapter 8 Chapter 9 pages 153-55 • Homework#3 • Extra Credit due Wednesday • Presentation The Nervous

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