chp 13 - Chapter 13 Introduction to Nervous System...

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Chapter 13 Introduction to Nervous System
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Functions of Nervous System Integration - control all body activities, store info. Sensory – detecting internal and external stimuli fullness of stomach or bee sting Motor – cause a response in muscles and glands (sweat and mucus glands)
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Nervous System Divisions Central nervous system (CNS) brain and spinal cord Peripheral nervous system (PNS) cranial and spinal nerves ganglia enteric plexus (root of neurons in the gut. Helps regulate digestion) sensory receptors
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Subdivisions of the PNS Somatic nervous system (SNS) (voluntary & reflex) neurons from receptors to CNS neurons sending info to skeletal muscle Autonomic nervous system (ANS) (involuntary) neurons from visceral organs to CNS neurons to smooth and cardiac muscle, organs and glands Enteric nervous system (ENS) (involuntary) neurons that control GI (gastrointestinal) tract function independently of brain
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Cells of nervous system Neurons Functional unit Excitable cells (it can generate action
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This note was uploaded on 05/28/2011 for the course BIO 331 taught by Professor Dr.burns during the Spring '10 term at N. Colorado.

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chp 13 - Chapter 13 Introduction to Nervous System...

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