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Cards In This Set
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What is the purpose of the organization of the nervous system?
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1)to detect changes (stimuli) in the internal and external environment.
2) evaluate that information and possibly respond by initiating changes in muscles or glands.
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How is the nervous system subdivided?
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It is subdivided into smaller systems and divisions.
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How is the nervous system subdivided?
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The nervous system is subdivided into Central Nervous System (cns) and Peripheral Nervous System (PNS).
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What makes up the CNS?
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It is made up of the brain and spinal cord. It is the structural and functional center of the nervous system.
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What does the cns do?
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It integras incoming pieces of sensory information, evaluates the information and initiates an outgoing response.
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What is the PNS?
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The peripheral nervous system is made up of the nerve tissues that lie in the periphery, or outer regions of the nervous system.
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What could nerve cell extensions be called if they extend from the cell body toward the cns?
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They may be called central fibers.
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What could nerve cell extensions be called if they extend from the cell body away from the cns?
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They may be called peripheral fibers.
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What do the afferent (carry toward) division of the nervous system consist of?
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They consist of all the incoming sensory or afferent pathways.
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What do the efferent (carry away) division of the nervous system consis of?
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It consists of all the outgoing motor or efferent pathways.
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What do the pathways of the somatic nervous system do?
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They carry information to the somatic effectors, which are the skeletal muscles.
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Where do the pathways of the autonomic nervous system carry information?
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They carry information to the autonomic, or visceral, effectors, which are the smooth muscles, cardiac muscle, glands, adipose tissue, and other involuntary tissue.
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How can the efferent pathways of the Autonomic nervous system be divided?
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They can be divided into the syspathetic division and the parasympathetic division.
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What makes up the sympathetic division?
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It is made up of pathways that exit the middle portions of the spinal cord.
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What is the sympathetic division involved in?
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It is involved in preparing the body to deal with immediate threats to the internal environment. It produces the fight or flight response.
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